| Article | |
| Report number | arXiv:2403.08982 ; DESY-24-034 |
| Title | Observation and differential cross section measurement of neutral current DIS events with an empty hemisphere in the Breit frame |
| Author(s) |
Andreev, V. (Unlisted) ; Arratia, M. (UC, Riverside) ; Baghdasaryan, A. (Yerevan Phys. Inst.) ; Baty, A. (Illinois U., Chicago) ; Begzsuren, K. (Ulaanbaatar U.) ; Bolz, A. (DESY, Zeuthen) ; Boudry, V. (Ecole Polytechnique) ; Brandt, G. (Gottingen U., II. Phys. Inst.) ; Britzger, D. (Munich, Max Planck Inst.) ; Buniatyan, A. (Birmingham U.) ; Bystritskaya, L. (Unlisted) ; Campbell, A.J. (DESY, Zeuthen) ; Cantun Avila, K.B. (Merida, IPN) ; Cerny, K. (Palacky U.) ; Chekelian, V. (Munich, Max Planck Inst.) ; Chen, Z. (Shandong U.) ; Contreras, J.G. (Merida, IPN) ; Cvach, J. (Prague, Inst. Phys.) ; Dainton, J.B. (Liverpool U.) ; Daum, K. (Wuppertal U.) ; Deshpande, A. (Stony Brook U. ; Brookhaven Natl. Lab.) ; Diaconu, C. (Marseille, CPPM) ; Drees, A. (Stony Brook U.) ; Eckerlin, G. (DESY, Zeuthen) ; Egli, S. (PSI, Villigen) ; Elsen, E. (DESY, Zeuthen) ; Favart, L. (Brussels U., IIHE) ; Fedotov, A. (Unlisted) ; Feltesse, J. (IRFU, Saclay) ; Fleischer, M. (DESY, Zeuthen) ; Fomenko, A. (Unlisted) ; Gal, C. (Stony Brook U.) ; Gayler, J. (DESY, Zeuthen) ; Goerlich, L. (Cracow, INP) ; Gogitidze, N. (DESY, Zeuthen) ; Gouzevitch, M. (Unlisted) ; Grab, C. (Zurich, ETH) ; Greenshaw, T. (Liverpool U.) ; Grindhammer, G. (Munich, Max Planck Inst.) ; Haidt, D. (DESY, Zeuthen) ; Henderson, R.C. W. (Lancaster U.) ; Hessler, J. (Munich, Max Planck Inst.) ; Hladký, J. (Prague, Inst. Phys.) ; Hoffmann, D. (Marseille, CPPM) ; Horisberger, R. (PSI, Villigen) ; Hreus, T. (Zurich U.) ; Huber, F. (Heidelberg U.) ; Jacobs, P.M. (LBL, Berkeley) ; Jacquet, M. (IJCLab, Orsay) ; Janssen, T. (Brussels U., IIHE) ; Jung, A.W. (Purdue U.) ; Katzy, J. (DESY, Zeuthen) ; Kiesling, C. (Munich, Max Planck Inst.) ; Klein, M. (Liverpool U.) ; Kleinwort, C. (DESY, Zeuthen) ; Klest, H.T. (Stony Brook U. ; Argonne, PHY) ; Kluth, S. (Munich, Max Planck Inst.) ; Kogler, R. (DESY, Zeuthen) ; Kostka, P. (Liverpool U.) ; Kretzschmar, J. (Liverpool U.) ; Krücker, D. (DESY, Zeuthen) ; Krüger, K. (DESY, Zeuthen) ; Landon, M.P. J. (Queen Mary, U. of London) ; Lange, W. (DESY, Zeuthen) ; Laycock, P. (Brookhaven Natl. Lab.) ; Lee, S.H. (Michigan U. ; Tennessee U.) ; Levonian, S. (DESY, Zeuthen) ; Li, W. (Rice U.) ; Lin, J. (Rice U.) ; Lipka, K. (DESY, Zeuthen) ; List, B. (DESY, Zeuthen) ; List, J. (DESY, Zeuthen) ; Lobodzinski, B. (Munich, Max Planck Inst.) ; Long, O.R. (UC, Riverside) ; Malinovski, E. (Unlisted) ; Martyn, H.-U. (RWTH Aachen U.) ; Maxfield, S.J. (Liverpool U.) ; Mehta, A. (Liverpool U.) ; Meyer, A.B. (DESY, Zeuthen) ; Meyer, J. (DESY, Zeuthen) ; Mikocki, S. (Cracow, INP) ; Mikuni, V.M. (LBL, Berkeley) ; Mondal, M.M. (NISER, Jatni) ; Müller, K. (Zurich U.) ; Nachman, B. (LBL, Berkeley) ; Naumann, Th. (DESY, Zeuthen) ; Newman, P.R. (Birmingham U.) ; Niebuhr, C. (DESY, Zeuthen) ; Nowak, G. (Cracow, INP) ; Olsson, J.E. (DESY, Zeuthen) ; Ozerov, D. (Unlisted) ; Park, S. (Stony Brook U.) ; Pascaud, C. (IJCLab, Orsay) ; Patel, G.D. (Liverpool U.) ; Perez, E. (CERN) ; Petrukhin, A. (Siegen U.) ; Picuric, I. (Montenegro U.) ; Pitzl, D. (DESY, Zeuthen) ; Polifka, R. (Charles U.) ; Preins, S. (UC, Riverside) ; Radescu, V. (Heidelberg U.) ; Raicevic, N. (Montenegro U.) ; Ravdandorj, T. (Ulaanbaatar U.) ; Reichelt, D. (Durham U., IPPP) ; Reimer, P. (Prague, Inst. Phys.) ; Rizvi, E. (Queen Mary, U. of London) ; Robmann, P. (Zurich U.) ; Roosen, R. (Brussels U., IIHE) ; Rostovtsev, A. (Unlisted) ; Rotaru, M. (Bucharest, IFIN-HH) ; Sankey, D.P. C. (Rutherford) ; Sauter, M. (Heidelberg U.) ; Sauvan, E. (Marseille, CPPM ; Annecy, LAPP) ; Schmitt, S. (DESY, Zeuthen) ; Schmookler, B.A. (Stony Brook U.) ; Schnell, G. (Basque U., Bilbao) ; Schoeffel, L. (IRFU, Saclay) ; Schöning, A. (Heidelberg U.) ; Schumann, S. (Gottingen U.) ; Sefkow, F. (DESY, Zeuthen) ; Shushkevich, S. (Munich, Max Planck Inst.) ; Soloviev, Y. (DESY, Zeuthen) ; Sopicki, P. (Cracow, INP) ; South, D. (DESY, Zeuthen) ; Specka, A. (Ecole Polytechnique) ; Steder, M. (DESY, Zeuthen) ; Stella, B. (Rome III U. ; INFN, Rome3) ; Stöcker, L. (Gottingen U.) ; Straumann, U. (Zurich U.) ; Sun, C. (Stony Brook U.) ; Sykora, T. (Charles U.) ; Thompson, P.D. (Birmingham U.) ; Acosta, F. Torales (LBL, Berkeley) ; Traynor, D. (Queen Mary, U. of London) ; Tseepeldorj, B. (Ulaanbaatar U.) ; Tu, Z. (Brookhaven Natl. Lab.) ; Tustin, G. (Stony Brook U.) ; Valkárová, A. (Charles U.) ; Vallée, C. (Marseille, CPPM) ; Van Mechelen, P. (Brussels U., IIHE) ; Wegener, D. (Dortmund U.) ; Wünsch, E. (DESY, Zeuthen) ; Žáček, J. (Charles U.) ; Zhang, J. (Shandong U.) ; Zhang, Z. (IJCLab, Orsay) ; Žlebčík, R. (Charles U.) ; Zohrabyan, H. (Yerevan Phys. Inst.) ; Zomer, F. (IJCLab, Orsay) |
| Publication | 2024-07-22 |
| Imprint | 2024-03-13 |
| Number of pages | 13 |
| Note | 13 pages, 5 figures, 2 Tables. This version as accepted for publication |
| In: | Eur. Phys. J. C 84 (2024) 720 |
| DOI | 10.1140/epjc/s10052-024-13003-1 |
| Subject category | nucl-ex ; Nuclear Physics - Experiment ; hep-ph ; Particle Physics - Phenomenology ; hep-ex ; Particle Physics - Experiment |
| Accelerator/Facility, Experiment | DESY HERA H1 |
| Abstract | The Breit frame provides a natural frame to analyze lepton-proton scattering events. In this reference frame, the parton model hard interactions between a quark and an exchanged boson defines the coordinate system such that the struck quark is back-scattered along the virtual photon momentum direction. In Quantum Chromodynamics (QCD), higher order perturbative or non-perturbative effects can change this picture drastically. As Bjorken-$x$ decreases below one half, a rather peculiar event signature is predicted with increasing probability, where no radiation is present in one of the two Breit-frame hemispheres and all emissions are to be found in the other hemisphere. At higher orders in $\alpha_s$ or in the presence of soft QCD effects, predictions of the rate of these events are far from trivial, and that motivates measurements with real data. We report on the first observation of the empty current hemisphere events in electron-proton collisions at the HERA collider using data recorded with the H1 detector at a center-of-mass energy of 319 GeV. The fraction of inclusive neutral-current DIS events with an empty hemisphere is found to be $0.0112 \pm 3.9\,\%_\text{stat} \pm 4.5\,\%_\text{syst} \pm 1.6\,\%_\text{mod}$ in the selected kinematic region of $150< Q^2<1500$ GeV$^2$ and inelasticity $0.14< y<0.7$. The data sample corresponds to an integrated luminosity of 351.1 pb$^{-1}$, sufficient to enable differential cross section measurements of these events. The results show an enhanced discriminating power at lower Bjorken-$x$ among different Monte Carlo event generator predictions. |
| Copyright/License | preprint: (License: arXiv nonexclusive-distrib 1.0) publication: © 2024 The Author(s) (License: CC-BY-4.0), sponsored by SCOAP³ |
Corresponding record in: Inspire
Journalen skapades 2024-03-21, och modifierades senast 2024-08-05