CERN Accelerating science

002839661 001__ 2839661
002839661 005__ 20230317042835.0
002839661 0248_ $$aoai:cds.cern.ch:2839661$$pcerncds:FULLTEXT$$pcerncds:CERN:FULLTEXT$$pcerncds:CERN
002839661 035__ $$9arXiv$$aoai:arXiv.org:2211.16586
002839661 035__ $$9Inspire$$a2605876
002839661 037__ $$9arXiv$$aarXiv:2211.16586$$chep-ex
002839661 037__ $$9arXiv:reportnumber$$aCERN-SPSC-2022-031
002839661 037__ $$9arXiv:reportnumber$$aSPSC-I-257
002839661 041__ $$aeng
002839661 088__ $$aSPSC-I-257
002839661 100__ $$aCortina Gil, E.$$uLouvain U., CP3$$vUniversité Catholique de Louvain,B-1348 Louvain-La-Neuve,Belgium
002839661 245__ $$aHIKE, High Intensity Kaon Experiments at the CERN SPS: Letter of Intent
002839661 260__ $$c2022
002839661 269__ $$aGeneva$$bCERN$$c07 Nov 2022
002839661 270__ $$mcristina.lazzeroni@cern.ch
002839661 270__ $$mAugusto.Ceccucci@cern.ch
002839661 300__ $$a114 p
002839661 490__ $$aLetter of Intent
002839661 500__ $$9arXiv$$aLetter of Intent submitted to CERN SPSC. Address all correspondence
 to hike-eb@cern.ch
002839661 520__ $$9arXiv$$aA timely and long-term programme of kaon decay measurements at a new level of precision is presented, leveraging the capabilities of the CERN Super Proton Synchrotron (SPS). The proposed programme is firmly anchored on the experience built up studying kaon decays at the SPS over the past four decades, and includes rare processes, CP violation, dark sectors, symmetry tests and other tests of the Standard Model. The experimental programme is based on a staged approach involving experiments with charged and neutral kaon beams, as well as operation in beam-dump mode. The various phases will rely on a common infrastructure and set of detectors.
002839661 540__ $$3preprint$$aCC BY 4.0$$uhttp://creativecommons.org/licenses/by/4.0/
002839661 595__ $$aSPSC
002839661 595__ $$aCERN EDS
002839661 595__ $$agiva a faire
002839661 65017 $$2SzGeCERN$$aDetectors and Experimental Techniques
002839661 65017 $$2SzGeCERN$$aParticle Physics - Experiment
002839661 693__ $$aCERN SPS$$eHIKE
002839661 690C_ $$aCERN
002839661 690C_ $$aSCICOM
002839661 690C_ $$aPUBLSPSC
002839661 700__ $$aJerhot, J.$$uLouvain U., CP3$$vUniversité Catholique de Louvain,B-1348 Louvain-La-Neuve,Belgium
002839661 700__ $$aLurkin, N.$$uLouvain U., CP3$$vUniversité Catholique de Louvain,B-1348 Louvain-La-Neuve,Belgium
002839661 700__ $$aNumao, T.$$uTRIUMF$$vTRIUMF,Vancouver,British Columbia,V6T 2A3,Canada
002839661 700__ $$aVelghe, B.$$uTRIUMF$$vTRIUMF,Vancouver,British Columbia,V6T 2A3,Canada
002839661 700__ $$aWong, V.W.S.$$uTRIUMF$$vTRIUMF,Vancouver,British Columbia,V6T 2A3,Canada
002839661 700__ $$aBryman, D.$$uBritish Columbia U.$$vUniversity of British Columbia,Vancouver,British Columbia,V6T 1Z4,Canada
002839661 700__ $$aBician, L.$$uCharles U.$$vCharles University,116 36 Prague 1,Czech Republic
002839661 700__ $$aHives, Z.$$uCharles U.$$vCharles University,116 36 Prague 1,Czech Republic
002839661 700__ $$aHusek, T.$$uCharles U.$$vCharles University,116 36 Prague 1,Czech Republic
002839661 700__ $$aKampf, K.$$uCharles U.$$vCharles University,116 36 Prague 1,Czech Republic
002839661 700__ $$aKoval, M.$$uCharles U.$$vCharles University,116 36 Prague 1,Czech Republic
002839661 700__ $$aAkmete, A.T.$$uMainz U.$$vJohannes Gutenberg Universität Mainz,D-55099 Mainz,Germany
002839661 700__ $$aAliberti, R.$$uMainz U.$$vJohannes Gutenberg Universität Mainz,D-55099 Mainz,Germany
002839661 700__ $$aBüscher, V.$$uMainz U.$$vJohannes Gutenberg Universität Mainz,D-55099 Mainz,Germany
002839661 700__ $$aDi Lella, L.$$uMainz U.$$vJohannes Gutenberg Universität Mainz,D-55099 Mainz,Germany
002839661 700__ $$aDoble, N.$$uMainz U.$$vJohannes Gutenberg Universität Mainz,D-55099 Mainz,Germany
002839661 700__ $$aPeruzzo, L.$$uMainz U.$$vJohannes Gutenberg Universität Mainz,D-55099 Mainz,Germany
002839661 700__ $$aSchott, M.$$uMainz U.$$vJohannes Gutenberg Universität Mainz,D-55099 Mainz,Germany
002839661 700__ $$aWahl, H.$$uMainz U.$$vJohannes Gutenberg Universität Mainz,D-55099 Mainz,Germany
002839661 700__ $$aWanke, R.$$uMainz U.$$vJohannes Gutenberg Universität Mainz,D-55099 Mainz,Germany
002839661 700__ $$aDöbrich, B.$$uMunich, Max Planck Inst.$$vMax-Planck-Institut für Physik (Werner-Heisenberg-Institut),D-80805 München,Germany
002839661 700__ $$aMontalto, L.$$uAncona, Politech. U. delle Marche$$vDipartimento di Scienze e Ingegneria della Materia,dell'Ambiente ed Urbanistica,Università Politecnica delle Marche,I-60131 Ancona,Italy
002839661 700__ $$aRinaldi, D.$$uAncona, Politech. U. delle Marche$$vDipartimento di Scienze e Ingegneria della Materia,dell'Ambiente ed Urbanistica,Università Politecnica delle Marche,I-60131 Ancona,Italy
002839661 700__ $$aDettori, F.$$uCagliari U.$$uINFN, Cagliari$$vDipartimento di Fisica dell'Università$$vINFN,Sezione di Cagliari,I-09042 Cagliari,Italy
002839661 700__ $$aCardini, A.$$uINFN, Cagliari$$vINFN,Sezione di Cagliari,I-09042 Cagliari,Italy
002839661 700__ $$aLai, A.$$uINFN, Cagliari$$vINFN,Sezione di Cagliari,I-09042 Cagliari,Italy
002839661 700__ $$aBomben, L.$$uINFN, Milan Bicocca$$uMilan Bicocca U.$$vUniversità degli Studi dell'Insubria,22100,Como and INFN Sezione Milano Bicocca,I-20126 Milano,Italy
002839661 700__ $$aCarsi, S.$$uINFN, Milan Bicocca$$uMilan Bicocca U.$$vUniversità degli Studi dell'Insubria,22100,Como and INFN Sezione Milano Bicocca,I-20126 Milano,Italy
002839661 700__ $$aPrest, M.$$uINFN, Milan Bicocca$$uMilan Bicocca U.$$vUniversità degli Studi dell'Insubria,22100,Como and INFN Sezione Milano Bicocca,I-20126 Milano,Italy
002839661 700__ $$aSelmi, A.$$uINFN, Milan Bicocca$$uMilan Bicocca U.$$vUniversità degli Studi dell'Insubria,22100,Como and INFN Sezione Milano Bicocca,I-20126 Milano,Italy
002839661 700__ $$aLezzani, G.$$uInsubria U., Varese$$vDipartimento di Scienza e Alta Tecnologia,Università degli Studi dell'Insubria,I-22100,Como,Italy
002839661 700__ $$aMonti-Guarnieri, P.$$uInsubria U., Varese$$vDipartimento di Scienza e Alta Tecnologia,Università degli Studi dell'Insubria,I-22100,Como,Italy
002839661 700__ $$aPerna, L.$$uInsubria U., Varese$$vDipartimento di Scienza e Alta Tecnologia,Università degli Studi dell'Insubria,I-22100,Como,Italy
002839661 700__ $$aDalpiaz, P.$$uFerrara U.$$uINFN, Ferrara$$vDipartimento di Fisica e Scienze della Terra dell'Università$$vINFN,Sezione di Ferrara,I-44122 Ferrara,Italy
002839661 700__ $$aGuidi, V.$$uFerrara U.$$uINFN, Ferrara$$vDipartimento di Fisica e Scienze della Terra dell'Università$$vINFN,Sezione di Ferrara,I-44122 Ferrara,Italy
002839661 700__ $$aMazzolari, A.$$uFerrara U.$$uINFN, Ferrara$$vDipartimento di Fisica e Scienze della Terra dell'Università$$vINFN,Sezione di Ferrara,I-44122 Ferrara,Italy
002839661 700__ $$aNeri, I.$$uFerrara U.$$uINFN, Ferrara$$vDipartimento di Fisica e Scienze della Terra dell'Università$$vINFN,Sezione di Ferrara,I-44122 Ferrara,Italy
002839661 700__ $$aPetrucci, F.$$uFerrara U.$$uINFN, Ferrara$$vDipartimento di Fisica e Scienze della Terra dell'Università$$vINFN,Sezione di Ferrara,I-44122 Ferrara,Italy
002839661 700__ $$aSoldani, M.$$uFerrara U.$$uINFN, Ferrara$$vDipartimento di Fisica e Scienze della Terra dell'Università$$vINFN,Sezione di Ferrara,I-44122 Ferrara,Italy
002839661 700__ $$aBandiera, L.$$uINFN, Ferrara$$vINFN,Sezione di Ferrara,I-44122 Ferrara,Italy
002839661 700__ $$aCotta Ramusino, A.$$uINFN, Ferrara$$vINFN,Sezione di Ferrara,I-44122 Ferrara,Italy
002839661 700__ $$aGianoli, A.$$uINFN, Ferrara$$vINFN,Sezione di Ferrara,I-44122 Ferrara,Italy
002839661 700__ $$aRomagnoni, M.$$uINFN, Ferrara$$vINFN,Sezione di Ferrara,I-44122 Ferrara,Italy
002839661 700__ $$aSytov, A.$$uINFN, Ferrara$$vINFN,Sezione di Ferrara,I-44122 Ferrara,Italy
002839661 700__ $$aLenti, M.$$uINFN, Florence$$uFlorence U.$$vDipartimento di Fisica e Astronomia dell’Università, I-50019 Sesto Fiorentino, Italy$$vINFN,Sezione di Firenze,I-50019 Sesto Fiorentino,Italy
002839661 700__ $$aPanichi, I.$$uFlorence U.$$uINFN, Florence$$vDipartimento di Fisica e Astronomia dell'Università$$vINFN,Sezione di Firenze,I-50019 Sesto Fiorentino,Italy
002839661 700__ $$aRuggiero, G.$$uFlorence U.$$uINFN, Florence$$vDipartimento di Fisica e Astronomia dell'Università$$vINFN,Sezione di Firenze,I-50019 Sesto Fiorentino,Italy
002839661 700__ $$aBizzeti, A.$$uINFN, Florence$$vINFN,Sezione di Firenze,I-50019 Sesto Fiorentino,Italy
002839661 700__ $$aBucci, F.$$uINFN, Florence$$vINFN,Sezione di Firenze,I-50019 Sesto Fiorentino,Italy
002839661 700__ $$aAntonelli, A.$$uFrascati$$vINFN Laboratori Nazionali di Frascati,I-00044 Frascati,Italy
002839661 700__ $$aDi Meco, E.$$uFrascati$$uRome U., Tor Vergata$$vINFN Laboratori Nazionali di Frascati,I-00044 Frascati,Italy$$vDipartimento di Fisica,Università degli Studi di Roma Tor Vergata,I-00133 Roma,Italy
002839661 700__ $$aLanfranchi, G.$$uFrascati$$vINFN Laboratori Nazionali di Frascati,I-00044 Frascati,Italy
002839661 700__ $$aMartellotti, S.$$uFrascati$$vINFN Laboratori Nazionali di Frascati,I-00044 Frascati,Italy
002839661 700__ $$aMartini, M.$$uFrascati$$uGuglielmo Marconi U.$$vINFN Laboratori Nazionali di Frascati,I-00044 Frascati,Italy$$vDipartimento di Scienze Ingegneristiche,Università degli Studi Guglielmo Marconi,I-00193 Roma,Italy
002839661 700__ $$aMoulson, M.$$uFrascati$$vINFN Laboratori Nazionali di Frascati,I-00044 Frascati,Italy
002839661 700__ $$aPaesani, D.$$uFrascati$$uRome U., Tor Vergata$$vINFN Laboratori Nazionali di Frascati,I-00044 Frascati,Italy$$vDipartimento di Fisica,Università degli Studi di Roma Tor Vergata,I-00133 Roma,Italy
002839661 700__ $$aSarra, I.$$uFrascati$$vINFN Laboratori Nazionali di Frascati,I-00044 Frascati,Italy
002839661 700__ $$aSpadaro, T.$$uFrascati$$vINFN Laboratori Nazionali di Frascati,I-00044 Frascati,Italy
002839661 700__ $$aTinti, G.$$uFrascati$$vINFN Laboratori Nazionali di Frascati,I-00044 Frascati,Italy
002839661 700__ $$aVallazza, E.$$uINFN, Milan Bicocca$$vINFN Sezione di Milano Bicocca,I-20126 Milano,Italy
002839661 700__ $$aAmbrosino, F.$$uNaples U.$$uINFN, Naples$$vDipartimento di Fisica "Ettore Pancini" dell'Università degli Studi di Napoli Federico II$$vINFN,Sezione di Napoli,I-80126 Napoli,Italy
002839661 700__ $$aGiordano, R.$$uNaples U.$$uINFN, Naples$$vDipartimento di Fisica "Ettore Pancini" dell'Università degli Studi di Napoli Federico II$$vINFN,Sezione di Napoli,I-80126 Napoli,Italy
002839661 700__ $$aMassarotti, P.$$uNaples U.$$uINFN, Naples$$vDipartimento di Fisica "Ettore Pancini" dell'Università degli Studi di Napoli Federico II$$vINFN,Sezione di Napoli,I-80126 Napoli,Italy
002839661 700__ $$aNapolitano, M.$$uNaples U.$$uINFN, Naples$$vDipartimento di Fisica "Ettore Pancini" dell'Università degli Studi di Napoli Federico II$$vINFN,Sezione di Napoli,I-80126 Napoli,Italy
002839661 700__ $$aSaracino, G.$$uNaples U.$$uINFN, Naples$$vDipartimento di Fisica "Ettore Pancini" dell'Università degli Studi di Napoli Federico II$$vINFN,Sezione di Napoli,I-80126 Napoli,Italy
002839661 700__ $$aDi Donato, C.$$uNaples U.$$uINFN, Naples$$vDipartimento di Ingegneria,Università degli Studi di Napoli Parthenope,I-80143 Napoli$$vINFN,Sezione di Napoli,I-80126 Napoli,Italy
002839661 700__ $$aD'Ambrosio, G.$$uINFN, Naples$$vINFN,Sezione di Napoli,I-80126 Napoli,Italy
002839661 700__ $$aD'Errico, M.$$uINFN, Naples$$vINFN,Sezione di Napoli,I-80126 Napoli,Italy
002839661 700__ $$aMirra, M.$$uINFN, Naples$$vINFN,Sezione di Napoli,I-80126 Napoli,Italy
002839661 700__ $$aNeshatpour, S.$$uINFN, Naples$$vINFN,Sezione di Napoli,I-80126 Napoli,Italy
002839661 700__ $$aFiorenza, R.$$uSSM, Naples$$uINFN, Naples$$vScuola Superiore Meridionale e INFN,Sezione di Napoli,I-80138 Napoli,Italy
002839661 700__ $$aRosa, I.$$uINFN, Naples$$uSSM, Naples$$vScuola Superiore Meridionale e INFN,Sezione di Napoli,I-80138 Napoli,Italy
002839661 700__ $$aDe Salvador, D.$$uINFN, Legnaro$$uPadua U.$$vDipartimento di Fisica e Astronomia dell' Università degli Studi di Padova,I-35131 Padova e INFN Laboratori Nazionali di Legnaro,I-35020 Legnaro,Italy
002839661 700__ $$aSgarbossa, F.$$uINFN, Legnaro$$uPadua U.$$vDipartimento di Fisica e Astronomia dell' Università degli Studi di Padova,I-35131 Padova e INFN Laboratori Nazionali di Legnaro,I-35020 Legnaro,Italy
002839661 700__ $$aAnzivino, G.$$uINFN, Perugia$$uPerugia U.$$vDipartimento di Fisica e Geologia dell'Università$$vINFN,Sezione di Perugia,I-06100 Perugia,Italy
002839661 700__ $$aGermani, S.$$uINFN, Perugia$$uPerugia U.$$vDipartimento di Fisica e Geologia dell'Università$$vINFN,Sezione di Perugia,I-06100 Perugia,Italy
002839661 700__ $$aVolpe, R.$$uINFN, Perugia$$uPerugia U.$$vDipartimento di Fisica e Geologia dell'Università$$vINFN,Sezione di Perugia,I-06100 Perugia,Italy
002839661 700__ $$aCenci, P.$$uINFN, Perugia$$vINFN,Sezione di Perugia,I-06100 Perugia,Italy
002839661 700__ $$aCutini, S.$$uINFN, Perugia$$vINFN,Sezione di Perugia,I-06100 Perugia,Italy
002839661 700__ $$aDuk, V.$$uINFN, Perugia$$vINFN,Sezione di Perugia,I-06100 Perugia,Italy
002839661 700__ $$aLubrano, P.$$uINFN, Perugia$$vINFN,Sezione di Perugia,I-06100 Perugia,Italy
002839661 700__ $$aPepe, M.$$uINFN, Perugia$$vINFN,Sezione di Perugia,I-06100 Perugia,Italy
002839661 700__ $$aPiccini, M.$$uINFN, Perugia$$vINFN,Sezione di Perugia,I-06100 Perugia,Italy
002839661 700__ $$aCostantini, F.$$uPisa U.$$uINFN, Pisa$$vDipartimento di Fisica dell'Università$$vINFN,Sezione di Pisa,I-56100 Pisa,Italy
002839661 700__ $$aDonati, S.$$uPisa U.$$uINFN, Pisa$$vDipartimento di Fisica dell'Università$$vINFN,Sezione di Pisa,I-56100 Pisa,Italy
002839661 700__ $$aGiorgi, M.$$uPisa U.$$uINFN, Pisa$$vDipartimento di Fisica dell'Università$$vINFN,Sezione di Pisa,I-56100 Pisa,Italy
002839661 700__ $$aGiudici, S.$$uPisa U.$$uINFN, Pisa$$vDipartimento di Fisica dell'Università$$vINFN,Sezione di Pisa,I-56100 Pisa,Italy
002839661 700__ $$aLamanna, G.$$uPisa U.$$uINFN, Pisa$$vDipartimento di Fisica dell'Università$$vINFN,Sezione di Pisa,I-56100 Pisa,Italy
002839661 700__ $$aPedreschi, E.$$uPisa U.$$uINFN, Pisa$$vDipartimento di Fisica dell'Università$$vINFN,Sezione di Pisa,I-56100 Pisa,Italy
002839661 700__ $$aPinzino, J.$$uPisa U.$$uINFN, Pisa$$vDipartimento di Fisica dell'Università$$vINFN,Sezione di Pisa,I-56100 Pisa,Italy
002839661 700__ $$aSozzi, M.$$uPisa U.$$uINFN, Pisa$$vDipartimento di Fisica dell'Università$$vINFN,Sezione di Pisa,I-56100 Pisa,Italy
002839661 700__ $$aFantechi, R.$$uINFN, Pisa$$vINFN,Sezione di Pisa,I-56100 Pisa,Italy
002839661 700__ $$aGiusti, V.$$uINFN, Pisa$$vINFN,Sezione di Pisa,I-56100 Pisa,Italy
002839661 700__ $$aSpinella, F.$$uINFN, Pisa$$vINFN,Sezione di Pisa,I-56100 Pisa,Italy
002839661 700__ $$aMannelli, I.$$uINFN, Pisa$$uPisa, Scuola Normale Superiore$$vScuola Normale Superiore e INFN,Sezione di Pisa,I-56100 Pisa,Italy
002839661 700__ $$aRaggi, M.$$uRome U.$$uINFN, Rome$$vDipartimento di Fisica,Sapienza Università di Roma$$vINFN,Sezione di Roma I,I-00185 Roma,Italy
002839661 700__ $$aBiagioni, A.$$uINFN, Rome$$vINFN,Sezione di Roma I,I-00185 Roma,Italy
002839661 700__ $$aCretaro, P.$$uINFN, Rome$$vINFN,Sezione di Roma I,I-00185 Roma,Italy
002839661 700__ $$aFrezza, O.$$uINFN, Rome$$vINFN,Sezione di Roma I,I-00185 Roma,Italy
002839661 700__ $$aLo Cicero, F.$$uINFN, Rome$$vINFN,Sezione di Roma I,I-00185 Roma,Italy
002839661 700__ $$aLonardo, A.$$uINFN, Rome$$vINFN,Sezione di Roma I,I-00185 Roma,Italy
002839661 700__ $$aTurisini, M.$$uINFN, Rome$$vINFN,Sezione di Roma I,I-00185 Roma,Italy
002839661 700__ $$aVicini, P.$$uINFN, Rome$$vINFN,Sezione di Roma I,I-00185 Roma,Italy
002839661 700__ $$aAmmendola, R.$$uRome U., Tor Vergata$$vDipartimento di Fisica,Università degli Studi di Roma Tor Vergata,I-00133 Roma,Italy
002839661 700__ $$aBonaiuto, V.$$uRome U., Tor Vergata$$vDipartimento di Fisica,Università degli Studi di Roma Tor Vergata,I-00133 Roma,Italy
002839661 700__ $$aFucci, A.$$uRome U., Tor Vergata$$vDipartimento di Fisica,Università degli Studi di Roma Tor Vergata,I-00133 Roma,Italy
002839661 700__ $$aSalamon, A.$$uRome U., Tor Vergata$$vDipartimento di Fisica,Università degli Studi di Roma Tor Vergata,I-00133 Roma,Italy
002839661 700__ $$aSargeni, F.$$uRome U., Tor Vergata$$vDipartimento di Fisica,Università degli Studi di Roma Tor Vergata,I-00133 Roma,Italy
002839661 700__ $$aArcidiacono, R.$$uTurin U.$$uINFN, Turin$$vDipartimento di Fisica dell'Università$$vINFN,Sezione di Torino,I-10125 Torino,Italy
002839661 700__ $$aBloch-Devaux, B.$$uTurin U.$$vDipartimento di Fisica dell’Università, I-10125 Torino, Italy
002839661 700__ $$aMenichetti, E.$$uTurin U.$$uINFN, Turin$$vDipartimento di Fisica dell'Università$$vINFN,Sezione di Torino,I-10125 Torino,Italy
002839661 700__ $$aMigliore, E.$$uTurin U.$$uINFN, Turin$$vDipartimento di Fisica dell'Università$$vINFN,Sezione di Torino,I-10125 Torino,Italy
002839661 700__ $$aBiino, C.$$uINFN, Turin$$vINFN,Sezione di Torino,I-10125 Torino,Italy
002839661 700__ $$aMarchetto, F.$$uINFN, Turin$$vINFN,Sezione di Torino,I-10125 Torino,Italy
002839661 700__ $$aBaigarashev, D.$$uInst. Nucl. Phys., Almaty$$vInstitute of Nuclear Physics,050032 Almaty,Kazakhstan
002839661 700__ $$aKambar, Y.$$uInst. Nucl. Phys., Almaty$$vInstitute of Nuclear Physics,050032 Almaty,Kazakhstan
002839661 700__ $$aKereibay, D.$$uInst. Nucl. Phys., Almaty$$vInstitute of Nuclear Physics,050032 Almaty,Kazakhstan
002839661 700__ $$aMukhamejanov, Y.$$uInst. Nucl. Phys., Almaty$$vInstitute of Nuclear Physics,050032 Almaty,Kazakhstan
002839661 700__ $$aSakhiyev, S.$$uInst. Nucl. Phys., Almaty$$vInstitute of Nuclear Physics,050032 Almaty,Kazakhstan
002839661 700__ $$aOlvera, A. Briano$$uSan Luis Potosi U.$$vInstituto de Física,Universidad Autónoma de San Luis Potosí,78240 San Luis Potosí,Mexico
002839661 700__ $$aEngelfried, J.$$uSan Luis Potosi U.$$vInstituto de Física,Universidad Autónoma de San Luis Potosí,78240 San Luis Potosí,Mexico
002839661 700__ $$aEstrada-Tristan, N.$$uSan Luis Potosi U.$$vInstituto de Física,Universidad Autónoma de San Luis Potosí,78240 San Luis Potosí,Mexico
002839661 700__ $$aPiandani, R.$$uSan Luis Potosi U.$$vInstituto de Física,Universidad Autónoma de San Luis Potosí,78240 San Luis Potosí,Mexico
002839661 700__ $$aSantos, M.A. Reyes$$uSan Luis Potosi U.$$vInstituto de Física,Universidad Autónoma de San Luis Potosí,78240 San Luis Potosí,Mexico
002839661 700__ $$aRivera, K.A. Rodriguez$$uSan Luis Potosi U.$$vInstituto de Física,Universidad Autónoma de San Luis Potosí,78240 San Luis Potosí,Mexico
002839661 700__ $$aBoboc, P.C.$$uBucharest, IFIN-HH$$vHoria Hulubei National Institute for R&D in Physics and Nuclear Engineering,077125 Bucharest-Magurele,Romania
002839661 700__ $$aBragadireanu, A.M.$$uBucharest, IFIN-HH$$vHoria Hulubei National Institute for R&D in Physics and Nuclear Engineering,077125 Bucharest-Magurele,Romania
002839661 700__ $$aGhinescu, S.A.$$uBucharest, IFIN-HH$$vHoria Hulubei National Institute for R&D in Physics and Nuclear Engineering,077125 Bucharest-Magurele,Romania
002839661 700__ $$aHutanu, O.E.$$uBucharest, IFIN-HH$$vHoria Hulubei National Institute for R&D in Physics and Nuclear Engineering,077125 Bucharest-Magurele,Romania
002839661 700__ $$aBlazek, T.$$uComenius U.$$vFaculty of Mathematics,Physics and Informatics,Comenius University,842 48,Bratislava,Slovakia
002839661 700__ $$aCerny, V.$$uComenius U.$$vFaculty of Mathematics,Physics and Informatics,Comenius University,842 48,Bratislava,Slovakia
002839661 700__ $$aKleimenova, A.$$uComenius U.$$vFaculty of Mathematics,Physics and Informatics,Comenius University,842 48,Bratislava,Slovakia
002839661 700__ $$aKucerova, Z.$$uComenius U.$$vFaculty of Mathematics,Physics and Informatics,Comenius University,842 48,Bratislava,Slovakia
002839661 700__ $$aMartinez Santos, D.$$uSantiago de Compostela U., IGFAE$$vAxencia Galega de Innovacion,Conselleria de Economia e Industria,Xunta de Galicia,15704 Santiago de Compostela,Spain
002839661 700__ $$aProuve, C.$$uSantiago de Compostela U., IGFAE$$vInstituto Galego de Física de Altas Enerxías (IGFAE),Universidade de Santiago de Compostela,15782 Santiago de Compostela,Spain
002839661 700__ $$aBoretto, M.$$uCERN$$vCERN,European Organization for Nuclear Research,CH-1211 Geneva 23,Switzerland
002839661 700__ $$aBrizioli, F.$$uCERN$$vCERN,European Organization for Nuclear Research,CH-1211 Geneva 23,Switzerland
002839661 700__ $$aCeccucci, A.$$uCERN$$vCERN,European Organization for Nuclear Research,CH-1211 Geneva 23,Switzerland
002839661 700__ $$aCorvino, M.$$uCERN$$vCERN,European Organization for Nuclear Research,CH-1211 Geneva 23,Switzerland
002839661 700__ $$aDanielsson, H.$$uCERN$$vCERN,European Organization for Nuclear Research,CH-1211 Geneva 23,Switzerland
002839661 700__ $$aDuval, F.$$uCERN$$vCERN,European Organization for Nuclear Research,CH-1211 Geneva 23,Switzerland
002839661 700__ $$aGamberini, E.$$uCERN$$vCERN,European Organization for Nuclear Research,CH-1211 Geneva 23,Switzerland
002839661 700__ $$aGuida, R.$$uCERN$$vCERN,European Organization for Nuclear Research,CH-1211 Geneva 23,Switzerland
002839661 700__ $$aHolzer, E.B.$$uCERN$$vCERN,European Organization for Nuclear Research,CH-1211 Geneva 23,Switzerland
002839661 700__ $$aJenninger, B.$$uCERN$$vCERN,European Organization for Nuclear Research,CH-1211 Geneva 23,Switzerland
002839661 700__ $$aLehmann Miotto, G.$$uCERN$$vCERN,European Organization for Nuclear Research,CH-1211 Geneva 23,Switzerland
002839661 700__ $$aLichard, P.$$uCERN$$vCERN,European Organization for Nuclear Research,CH-1211 Geneva 23,Switzerland
002839661 700__ $$aMassri, K.$$uCERN$$vCERN,European Organization for Nuclear Research,CH-1211 Geneva 23,Switzerland
002839661 700__ $$aMinucci, E.$$uCERN$$vCERN,European Organization for Nuclear Research,CH-1211 Geneva 23,Switzerland
002839661 700__ $$aPerrin-Terrin, M.$$uCERN$$vCERN,European Organization for Nuclear Research,CH-1211 Geneva 23,Switzerland
002839661 700__ $$aRyjov, V.$$uCERN$$vCERN,European Organization for Nuclear Research,CH-1211 Geneva 23,Switzerland
002839661 700__ $$aSwallow, J.$$uCERN$$vCERN,European Organization for Nuclear Research,CH-1211 Geneva 23,Switzerland
002839661 700__ $$aVan Dijk, M.$$uCERN$$vCERN,European Organization for Nuclear Research,CH-1211 Geneva 23,Switzerland
002839661 700__ $$aZamkovsky, M.$$uCERN$$vCERN,European Organization for Nuclear Research,CH-1211 Geneva 23,Switzerland
002839661 700__ $$aMarchevski, R.$$uEcole Polytechnique, Lausanne$$vEcole polytechnique fédérale de Lausanne (EPFL),CH-1015 Lausanne,Switzerland
002839661 700__ $$aGerbershagen, A.$$uGroningen, KVI$$vPARTREC,UMCG,University of Groningen,9747 AA Groningen,The Netherlands
002839661 700__ $$aFry, J.R.$$uBirmingham U.$$vSchool of Physics and Astronomy,University of Birmingham,Edgbaston,Birmingham,B15 2TT,UK
002839661 700__ $$aGonnella, F.$$uBirmingham U.$$vSchool of Physics and Astronomy,University of Birmingham,Edgbaston,Birmingham,B15 2TT,UK
002839661 700__ $$aGoudzovski, E.$$uBirmingham U.$$vSchool of Physics and Astronomy,University of Birmingham,Edgbaston,Birmingham,B15 2TT,UK
002839661 700__ $$aHenshaw, J.$$uBirmingham U.$$vSchool of Physics and Astronomy,University of Birmingham,Edgbaston,Birmingham,B15 2TT,UK
002839661 700__ $$aKenworthy, C.$$uBirmingham U.$$vSchool of Physics and Astronomy,University of Birmingham,Edgbaston,Birmingham,B15 2TT,UK
002839661 700__ $$aLazzeroni, C.$$uBirmingham U.$$vSchool of Physics and Astronomy,University of Birmingham,Edgbaston,Birmingham,B15 2TT,UK
002839661 700__ $$aParkinson, C.$$uBirmingham U.$$vSchool of Physics and Astronomy,University of Birmingham,Edgbaston,Birmingham,B15 2TT,UK
002839661 700__ $$aRomano, A.$$uBirmingham U.$$vSchool of Physics and Astronomy,University of Birmingham,Edgbaston,Birmingham,B15 2TT,UK
002839661 700__ $$aSanders, J.$$uBirmingham U.$$vSchool of Physics and Astronomy,University of Birmingham,Edgbaston,Birmingham,B15 2TT,UK
002839661 700__ $$aShaikhiev, A.$$uBirmingham U.$$vSchool of Physics and Astronomy,University of Birmingham,Edgbaston,Birmingham,B15 2TT,UK
002839661 700__ $$aTomczak, A.$$uBirmingham U.$$vSchool of Physics and Astronomy,University of Birmingham,Edgbaston,Birmingham,B15 2TT,UK
002839661 700__ $$aHeath, H.$$uBristol U.$$vSchool of Physics,University of Bristol,Bristol,BS8 1TH,UK
002839661 700__ $$aBritton, D.$$uGlasgow U.$$vSchool of Physics and Astronomy,University of Glasgow,Glasgow,G12 8QQ,UK
002839661 700__ $$aNorton, A.$$uGlasgow U.$$vSchool of Physics and Astronomy,University of Glasgow,Glasgow,G12 8QQ,UK
002839661 700__ $$aProtopopescu, D.$$uGlasgow U.$$vSchool of Physics and Astronomy,University of Glasgow,Glasgow,G12 8QQ,UK
002839661 700__ $$aDainton, J.B.$$uLancaster U.$$vFaculty of Science and Technology,University of Lancaster,Lancaster,LA1 4YW,UK
002839661 700__ $$aJones, R.W.L.$$uLancaster U.$$vFaculty of Science and Technology,University of Lancaster,Lancaster,LA1 4YW,UK
002839661 700__ $$aDe Santo, A.$$uSussex U.$$vDepartment of Physics and Astronomy,University of Sussex,Brighton,BN1 4GE,UK
002839661 700__ $$aSalvatore, F.$$uSussex U.$$vDepartment of Physics and Astronomy,University of Sussex,Brighton,BN1 4GE,UK
002839661 700__ $$aCooper, P.$$uGeorge Mason U.$$vPhysics and Astronomy Department,George Mason University,Fairfax,VA 22030,USA
002839661 700__ $$aCoward, D.$$uGeorge Mason U.$$vPhysics and Astronomy Department,George Mason University,Fairfax,VA 22030,USA
002839661 700__ $$aRubin, P.$$uGeorge Mason U.$$vPhysics and Astronomy Department,George Mason University,Fairfax,VA 22030,USA
002839661 710__ $$gHIKE Collaboration
002839661 710__ $$aCERN. Geneva. SPS and PS Experiments Committee
002839661 710__ $$aSPSC
002839661 710__ $$5PH
002839661 859__ $$fcristina.lazzeroni@cern.ch
002839661 8564_ $$82405164$$s25052884$$uhttp://cds.cern.ch/record/2839661/files/SPSC-I-257.pdf$$yFulltext
002839661 8564_ $$82424209$$s75221$$uhttp://cds.cern.ch/record/2839661/files/HIKE-HNL.png$$y00023 Summary of the upper limits at 90\% CL of the HNL mixing parameters $|U_{e4}|^2$ and $|U_{\mu4}|^2$ obtained from production searches, and HIKE Phase~1 sensitivity with $K^+\to\ell^+N$ decays. HIKE projection for $|U_{\mu4}|^2$ assumes data collection with a highly-downscaled control trigger, and may improve by an order of magnitude in case a software trigger is employed.
002839661 8564_ $$82424210$$s84265$$uhttp://cds.cern.ch/record/2839661/files/klever_kl_flux.png$$y00013 Momentum distributions for $K_L$ mesons (top), photons (bottom left), and neutrons (bottom right) in the neutral beam at various points along the neutral beamline.
002839661 8564_ $$82424211$$s362310$$uhttp://cds.cern.ch/record/2839661/files/HIKE_FinalLoISketches_KLPhase2_Annotated_v2.png$$y00024 HIKE Phase~2 layout, with an aspect ratio of 1:10.
002839661 8564_ $$82424212$$s42333$$uhttp://cds.cern.ch/record/2839661/files/Screenshot2Page1-3spills.png$$y00003 The spill configuration used on 22 October 2022, as seen from SPS Page~1.
002839661 8564_ $$82424213$$s415765$$uhttp://cds.cern.ch/record/2839661/files/HIKE_FinalLoISketches_KplusPhase1_Annotated_v3.png$$y00017 HIKE Phase~1 layout, with an aspect ratio of 1:10.
002839661 8564_ $$82424214$$s149639$$uhttp://cds.cern.ch/record/2839661/files/lambda_kl_prod_vs_ang.png$$y00009 Left: neutral beam fluxes per POT per $\mu$sr of acceptance for $K_L$ (blue) and $\Lambda$ (red) vs beam production angle. Right: ratios of $\gamma$ (green), $n$ (red), and $\Lambda$ (blue) to $K_L$ fluxes vs beam production angle. FLUKA (Geant4) results are shown with squares (circles), with solid (dashed) curves from fits.
002839661 8564_ $$82424215$$s108932$$uhttp://cds.cern.ch/record/2839661/files/lambda_kl_080.png$$y00012 $K_L$ (blue) and $\Lambda$ (red) beam momentum spectrum (number of particles in beam per POT per $\mu$sr of neutral beam acceptance) for production angles of 2.4~mrad (left) and 8~mrad (right). The solid curves show a parameterisation~\cite{Malensek:1981em} of FLUKA results at production; dashed curves show the momentum spectra for particles decaying in an indicative fiducial volume of the experiment extending from 135~m to 195~m downstream of the target.
002839661 8564_ $$82424216$$s107717$$uhttp://cds.cern.ch/record/2839661/files/PnnSMvsLNVstudies_SignalMCDistribution_MCTruthNoSel_LNV_SRs.png$$y00020 Simulated distributions of the squared missing mass $m_{\rm miss}^{2}=(P_{K^+}-P_{\pi^+})^2$ vs pion momentum in the laboratory frame for the SM $K^+\to\pi^+\nu\bar\nu$ decay with a vector nature (left) and the LNV $K^+\to\pi^+\nu\nu$ decay with a scalar nature (right). Black boxes indicate the signal regions for which experimental sensitivity is highest.
002839661 8564_ $$82424217$$s18217$$uhttp://cds.cern.ch/record/2839661/files/HIKE_Yukawa_comparison_v3.png$$y00038 Exclusion limits at 90\% CL obtained with the \texttt{ALPINIST} framework for an axion-like particle $a$. Current exclusion limits are shown with filled and future projections with empty contours. In the BC10 scenario (left), we assume HIKE sensitivity to ALP production from $B$ meson decays and to the ALP decays $a \to ee$ and $a \to \mu\mu$. In the BC11 scenario (right), we assume HIKE sensitivity to $a \to \gamma\gamma$ decays (dashed contour) and also to the hadronic decays $a \to \pi^+\pi^-\gamma$, $3\pi$, $2\pi\eta$, etc. (full contour).
002839661 8564_ $$82424218$$s81132$$uhttp://cds.cern.ch/record/2839661/files/peak_mom_vs_ang.png$$y00008 Mean (left) and peak (right) momentum for $K_L$ (red) and $\Lambda$ (blue) components vs beam production angle, from FLUKA (squares) and Geant4 (circles), with solid (dashed) curves from fits to the form in Ref.~\cite{Malensek:1981em}.
002839661 8564_ $$82424219$$s62276$$uhttp://cds.cern.ch/record/2839661/files/HIKEProjections_Kmu2RV__Projections_RVeff_vs_IfineMHz_LOI_E3_WithNA62_Final.png$$y00018 Expected HIKE Phase~1 random veto efficiency $\varepsilon_{\rm RV}$ for the $K^+\to\pi^+\nu\bar\nu$ analysis as a function of instantaneous beam intensity: the total effect (grey band) and the contributions from the individual photon/multiplicity veto conditions. The NA62 graph is also shown for comparison: the lower $\varepsilon_{\rm RV}$ values with respect to HIKE Phase~1 are due to the worse time resolution.
002839661 8564_ $$82424220$$s251027$$uhttp://cds.cern.ch/record/2839661/files/HNL_ue2_100_90CL_geom_only_1e19_5e19.png$$y00035 HIKE 90\% CL exclusion limits for BC6 (top-left), BC7 (top-centre) and BC8 (bottom) scenarios in the beam-dump mode, assuming sensitivity to two-track final states and NA62 geometrical acceptance. The currently excluded areas of parameter space are shown in grey.
002839661 8564_ $$82424221$$s47447$$uhttp://cds.cern.ch/record/2839661/files/klever_halo_mec.png$$y00028 Radial distribution of particle fluxes at the MEC for KLEVER, from FLUKA beamline simulation.
002839661 8564_ $$82424222$$s105390$$uhttp://cds.cern.ch/record/2839661/files/lambda_kl_024.png$$y00011 $K_L$ (blue) and $\Lambda$ (red) beam momentum spectrum (number of particles in beam per POT per $\mu$sr of neutral beam acceptance) for production angles of 2.4~mrad (left) and 8~mrad (right). The solid curves show a parameterisation~\cite{Malensek:1981em} of FLUKA results at production; dashed curves show the momentum spectra for particles decaying in an indicative fiducial volume of the experiment extending from 135~m to 195~m downstream of the target.
002839661 8564_ $$82424223$$s34619$$uhttp://cds.cern.ch/record/2839661/files/sens_lambda_loi.png$$y00031 Distribution of $\Lambda\to n\pi^0$ events in the $(z_{\rm rec}, p_\perp)$ plane from fast MC simulation of the configuration with beamline extension, for all events with two photons on the MEC (left), and after $r_{\rm min}$, $E_{\rm min}$, and preshower cuts (right).
002839661 8564_ $$82424224$$s115533$$uhttp://cds.cern.ch/record/2839661/files/kaon_flavour.png$$y00001 Relation between kaon rare decay modes and the parameters $\rho$ and $\eta$ of the unitary triangle (UT). The direct link between decay modes and the UT indicates short distance terms dependent on $\rho$ or $\eta$ contributing to the corresponding decay amplitudes. Decays not directly connected to the UT are relevant to interpret the experimental results of the decay modes to which they are related.
002839661 8564_ $$82424225$$s107421$$uhttp://cds.cern.ch/record/2839661/files/klever_target_photons.png$$y00016 Photon fluxes (for $E>5$~GeV) at the SAC as functions of photon converter thickness for beryllium, copper, and lead targets. The dotted line indicates the flux corresponding to a rate of 40~MHz, considered to be the maximum tolerable rate for high-energy photons on the SAC.
002839661 8564_ $$82424226$$s60312$$uhttp://cds.cern.ch/record/2839661/files/sens_sig_loi.png$$y00029 Distribution of $K_L\to\pi^0\nu\bar{\nu}$ events in the $(z_{\rm rec}, p_\perp)$ plane, from fast MC simulation of the configuration with beamline extension, for all events with two photons on the MEC (left), and after $r_{\rm min}$, $E_{\rm min}$, and preshower cuts (right).
002839661 8564_ $$82424227$$s69917$$uhttp://cds.cern.ch/record/2839661/files/HIKE_LoILogo_JS_FINAL_NewPenguins.png$$y00000 figs/HIKE_LoILogo_JS_FINAL_NewPenguins.pdf
002839661 8564_ $$82424228$$s95753$$uhttp://cds.cern.ch/record/2839661/files/PnnSMvsLNVstudies_SignalMCDistribution_MCTruthNoSel_SM_SRs.png$$y00019 Simulated distributions of the squared missing mass $m_{\rm miss}^{2}=(P_{K^+}-P_{\pi^+})^2$ vs pion momentum in the laboratory frame for the SM $K^+\to\pi^+\nu\bar\nu$ decay with a vector nature (left) and the LNV $K^+\to\pi^+\nu\nu$ decay with a scalar nature (right). Black boxes indicate the signal regions for which experimental sensitivity is highest.
002839661 8564_ $$82424229$$s66938$$uhttp://cds.cern.ch/record/2839661/files/KL_hybrid_P.png$$y00026 Acceptances for rare $K_L$ decays for HIKE Phase~2, in bins of the decay vertex longitudinal coordinate (left) and $K_L$ momentum (right). Momentum distribution of the $K_L$ mesons decaying in the decay volume is shown by a continuous curve in the right panel.
002839661 8564_ $$82424230$$s234805$$uhttp://cds.cern.ch/record/2839661/files/HNL_umu2_010_90CL_geom_only_1e19_5e19.png$$y00036 HIKE 90\% CL exclusion limits for BC6 (top-left), BC7 (top-centre) and BC8 (bottom) scenarios in the beam-dump mode, assuming sensitivity to two-track final states and NA62 geometrical acceptance. The currently excluded areas of parameter space are shown in grey.
002839661 8564_ $$82424231$$s83114$$uhttp://cds.cern.ch/record/2839661/files/mean_mom_vs_ang.png$$y00007 Mean (left) and peak (right) momentum for $K_L$ (red) and $\Lambda$ (blue) components vs beam production angle, from FLUKA (squares) and Geant4 (circles), with solid (dashed) curves from fits to the form in Ref.~\cite{Malensek:1981em}.
002839661 8564_ $$82424232$$s37370$$uhttp://cds.cern.ch/record/2839661/files/KL_hybrid_Z.png$$y00025 Acceptances for rare $K_L$ decays for HIKE Phase~2, in bins of the decay vertex longitudinal coordinate (left) and $K_L$ momentum (right). Momentum distribution of the $K_L$ mesons decaying in the decay volume is shown by a continuous curve in the right panel.
002839661 8564_ $$82424233$$s55867$$uhttp://cds.cern.ch/record/2839661/files/PBCAxionModel_forKpiX_all_v5.png$$y00022 Left: excluded regions at 90\% CL of the $(m_S,\sin^2\theta)$ parameter space for a dark scalar, $S$, of the BC4 model~\cite{Beacham:2019nyx}. Right: excluded regions of the parameter space $(m_{a},g_{Y})$ for an ALP, $a$, of the BC10 model~\cite{Beacham:2019nyx}. The exclusion bound from analysis of NA62 Run~1 data~\cite{NA62:2020xlg,NA62:2020pwi,NA62:2021zjw} is shown in purple; the projected exclusion for HIKE Phase~1 and Phase~3 (KLEVER, assuming invisible $S$ or $a$ and updated from Ref.~\cite{Beacham:2019nyx}) is shown in red and light blue, respectively. Other exclusion bounds are shown in grey, including results from E949~\cite{BNL-E949:2009dza}, CHARM~\cite{Winkler:2018qyg,CHARM:1985anb}, NA48/2~\cite{NA482:2016sfh}, LHCb~\cite{LHCb:2016awg,LHCb:2015nkv}, Belle~\cite{Belle:2009zue}, $K_{\mu2}$ experiment~\cite{Yamazaki:1984vg}, CLEO~\cite{CLEO:2001acz}, KTEV~\cite{KTEV:2000ngj}, MicroBooNE~\cite{MicroBooNE:2021usw}.
002839661 8564_ $$82424234$$s33805$$uhttp://cds.cern.ch/record/2839661/files/dAmbrosioEtAl2022_Fig10.png$$y00002 Global fit to current data (purple, labelled as ``current fit'' in the legend) and the results of two projections discussed in Ref.~\cite{DAmbrosio:2022kvb}: A, light-red, where central values of observables currently only constrained with upper bounds are set to the SM predictions; B, dark-red, where central values for all of the observables are best-fit projections from existing data. The SM and best-fit point with the current data are indicated with black and purple crosses, respectively. The two figures represent the two possible signs of the long-distance contribution to the $K_L\to\mu^+\mu^-$ process; the sign ambiguity may be resolved with future data.
002839661 8564_ $$82424235$$s60062$$uhttp://cds.cern.ch/record/2839661/files/PBCScalarModel_forKpiX_all_v5.png$$y00021 Left: excluded regions at 90\% CL of the $(m_S,\sin^2\theta)$ parameter space for a dark scalar, $S$, of the BC4 model~\cite{Beacham:2019nyx}. Right: excluded regions of the parameter space $(m_{a},g_{Y})$ for an ALP, $a$, of the BC10 model~\cite{Beacham:2019nyx}. The exclusion bound from analysis of NA62 Run~1 data~\cite{NA62:2020xlg,NA62:2020pwi,NA62:2021zjw} is shown in purple; the projected exclusion for HIKE Phase~1 and Phase~3 (KLEVER, assuming invisible $S$ or $a$ and updated from Ref.~\cite{Beacham:2019nyx}) is shown in red and light blue, respectively. Other exclusion bounds are shown in grey, including results from E949~\cite{BNL-E949:2009dza}, CHARM~\cite{Winkler:2018qyg,CHARM:1985anb}, NA48/2~\cite{NA482:2016sfh}, LHCb~\cite{LHCb:2016awg,LHCb:2015nkv}, Belle~\cite{Belle:2009zue}, $K_{\mu2}$ experiment~\cite{Yamazaki:1984vg}, CLEO~\cite{CLEO:2001acz}, KTEV~\cite{KTEV:2000ngj}, MicroBooNE~\cite{MicroBooNE:2021usw}.
002839661 8564_ $$82424236$$s15666$$uhttp://cds.cern.ch/record/2839661/files/HIKE_DS_comparison_v3.png$$y00033 90\% CL exclusion limits obtained in simulations using the \texttt{ALPINIST} framework with the selection criteria described in~\cite{Jerhot:2022chi}. Current exclusion limits are shown with filled and future projections with empty contours. Left: Search for a dark scalar $S$ in the BC4 scenario. For HIKE, production from $B \to K^{(\ast)} S$ decays and sensitivity to $S\to ee,\mu\mu, \pi\pi, KK$ decays are considered. The $S$ hadronic decay widths derived in~\cite{Winkler:2018qyg} have been used. Exclusions from LHCb~\cite{LHCb:2016awg,LHCb:2015nkv}, NA62 Run 1~\cite{NA62:2021zjw,NA62:2020pwi}, E137, and CHARM measurements are separately shown. The E137 exclusion is obtained using the \texttt{ALPINIST} framework with data provided in~\cite{Dolan:2017osp}. Right: search for an axion-like particle $a$ in the BC9 scenario. HIKE sensitivity to $a\to \gamma\gamma$ decays is considered.
002839661 8564_ $$82424237$$s49198$$uhttp://cds.cern.ch/record/2839661/files/klever_beam.png$$y00006 Baseline design of neutral beamline for HIKE Phases~2 and 3.
002839661 8564_ $$82424238$$s229679$$uhttp://cds.cern.ch/record/2839661/files/K12_optics.png$$y00005 Beam optics for the K12 beamline. The red line depicts the local values of the R12 (horizontal) and R34 (vertical) beam transport matrix terms. The dotted black line shows the local dispersion terms R16 (horizontal) and R36 (vertical).
002839661 8564_ $$82424239$$s28253$$uhttp://cds.cern.ch/record/2839661/files/HIKE_GG_comparison_v3.png$$y00039 Exclusion limits at 90\% CL obtained with the \texttt{ALPINIST} framework for an axion-like particle $a$. Current exclusion limits are shown with filled and future projections with empty contours. In the BC10 scenario (left), we assume HIKE sensitivity to ALP production from $B$ meson decays and to the ALP decays $a \to ee$ and $a \to \mu\mu$. In the BC11 scenario (right), we assume HIKE sensitivity to $a \to \gamma\gamma$ decays (dashed contour) and also to the hadronic decays $a \to \pi^+\pi^-\gamma$, $3\pi$, $2\pi\eta$, etc. (full contour).
002839661 8564_ $$82424240$$s146076$$uhttp://cds.cern.ch/record/2839661/files/kl_ratio_vs_ang.png$$y00010 Left: neutral beam fluxes per POT per $\mu$sr of acceptance for $K_L$ (blue) and $\Lambda$ (red) vs beam production angle. Right: ratios of $\gamma$ (green), $n$ (red), and $\Lambda$ (blue) to $K_L$ fluxes vs beam production angle. FLUKA (Geant4) results are shown with squares (circles), with solid (dashed) curves from fits.
002839661 8564_ $$82424241$$s336370$$uhttp://cds.cern.ch/record/2839661/files/DP_90CL_geom_only_1e19_5e19.png$$y00032 Expected HIKE 90\% CL exclusion limits for the BC1 scenario ($A^\prime\to\ell^+\ell^-$). The currently excluded areas of parameter space are shown in grey.
002839661 8564_ $$82424242$$s78972$$uhttp://cds.cern.ch/record/2839661/files/klever_neutron_flux.png$$y00015 Momentum distributions for $K_L$ mesons (top), photons (bottom left), and neutrons (bottom right) in the neutral beam at various points along the neutral beamline.
002839661 8564_ $$82424243$$s119990$$uhttp://cds.cern.ch/record/2839661/files/sens_2p0_loi.png$$y00030 Distribution of $K_L\to\pi^0\pi^0$ events in the $(z_{\rm rec}, p_\perp)$ plane, from fast MC simulation of the configuration with beamline extension, for all events with two photons on the MEC (left column), and after $r_{\rm min}$ and $E_{\rm min}$ cuts (right column). The preshower cuts are not applied. From top to bottom, rows show events with the two photons from the same $\pi^0$ (even), with the two photos from different $\pi^0$'s (odd), and with at least one cluster containing overlapping photons (fused).
002839661 8564_ $$82424244$$s77430$$uhttp://cds.cern.ch/record/2839661/files/P42optics.png$$y00004 Beam optics for the P42 primary beam line, delivering protons from the T4 production target to the T10 kaon production target. The red line depicts the local values of the R12 (horizontal) and R34 (vertical) beam transport matrix terms. The dotted blue line shows the local dispersion terms R16 (horizontal) and R36 (vertical).
002839661 8564_ $$82424245$$s68849$$uhttp://cds.cern.ch/record/2839661/files/klever_photon_flux.png$$y00014 Momentum distributions for $K_L$ mesons (top), photons (bottom left), and neutrons (bottom right) in the neutral beam at various points along the neutral beamline.
002839661 8564_ $$82424246$$s18727$$uhttp://cds.cern.ch/record/2839661/files/HIKE_BB_comparison_v3.png$$y00034 90\% CL exclusion limits obtained in simulations using the \texttt{ALPINIST} framework with the selection criteria described in~\cite{Jerhot:2022chi}. Current exclusion limits are shown with filled and future projections with empty contours. Left: Search for a dark scalar $S$ in the BC4 scenario. For HIKE, production from $B \to K^{(\ast)} S$ decays and sensitivity to $S\to ee,\mu\mu, \pi\pi, KK$ decays are considered. The $S$ hadronic decay widths derived in~\cite{Winkler:2018qyg} have been used. Exclusions from LHCb~\cite{LHCb:2016awg,LHCb:2015nkv}, NA62 Run 1~\cite{NA62:2021zjw,NA62:2020pwi}, E137, and CHARM measurements are separately shown. The E137 exclusion is obtained using the \texttt{ALPINIST} framework with data provided in~\cite{Dolan:2017osp}. Right: search for an axion-like particle $a$ in the BC9 scenario. HIKE sensitivity to $a\to \gamma\gamma$ decays is considered.
002839661 8564_ $$82424247$$s24923016$$uhttp://cds.cern.ch/record/2839661/files/2211.16586.pdf$$yFulltext
002839661 8564_ $$82424248$$s196883$$uhttp://cds.cern.ch/record/2839661/files/HNL_utau2_001_90CL_geom_only_1e19_5e19.png$$y00037 HIKE 90\% CL exclusion limits for BC6 (top-left), BC7 (top-centre) and BC8 (bottom) scenarios in the beam-dump mode, assuming sensitivity to two-track final states and NA62 geometrical acceptance. The currently excluded areas of parameter space are shown in grey.
002839661 8564_ $$82424249$$s377577$$uhttp://cds.cern.ch/record/2839661/files/HIKE_FinalLoISketches_KLEVERPhase3_Annotated_v2.png$$y00027 HIKE Phase~3 (KLEVER) layout, with an aspect ratio of 1:10. The baseline configuration, without the extension of the beamline by 150 m is shown.
002839661 903__ $$spublic
002839661 906__ $$aCERN$$mAugusto.Ceccucci@cern.ch$$pCeccucci, Augusto
002839661 905__ $$aUniversity of Birmingham$$mcristina.lazzeroni@cern.ch$$pLazzeroni, Cristina
002839661 916__ $$sn$$w202245
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002839661 980__ $$aSCICOMMPUBLSPSC
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002839661 980__ $$aPREPRINT