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Article
Report number arXiv:1612.04723 ; CERN-EP-2016-310
Title Searches for lepton number violation and resonances in $K^{\pm} \rightarrow \pi\mu\mu$ decays
Author(s)

Batley, J.R. (Cambridge U.) ; Kalmus, G. (Cambridge U.) ; Lazzeroni, C. (Cambridge U. ; Birmingham U.) ; Munday, D.J. (Cambridge U.) ; Slater, M.W. (Cambridge U. ; Birmingham U.) ; Wotton, S.A. (Cambridge U.) ; Arcidiacono, R. (CERN ; Piemonte Orientale U., Novara ; INFN, Turin) ; Bocquet, G. (CERN) ; Cabibbo, N. (CERN) ; Ceccucci, A. (CERN) ; Cundy, D. (CERN ; Turin, Cosmo-Geofisica Lab) ; Falaleev, V. (CERN) ; Fidecaro, M. (CERN) ; Gatignon, L. (CERN) ; Gonidec, A. (CERN) ; Kubischta, W. (CERN) ; Maier, A. (CERN) ; Massri, K. (CERN) ; Norton, A. (CERN ; Ferrara U.) ; Patel, M. (CERN ; Imperial Coll., London) ; Peters, A. (CERN) ; Balev, S. (Dubna, JINR) ; Frabetti, P.L. (Dubna, JINR) ; Gersabeck, E. (Dubna, JINR ; Heidelberg U.) ; Goudzovski, E. (Dubna, JINR ; Birmingham U.) ; Hristov, P. (Dubna, JINR ; CERN) ; Kekelidze, V. (Dubna, JINR) ; Kozhuharov, V. (Dubna, JINR ; Frascati ; Sofiya U.) ; Litov, L. (Dubna, JINR) ; Madigozhin, D. (Dubna, JINR) ; Molokanova, N. (Dubna, JINR) ; Polenkevich, I. (Dubna, JINR) ; Potrebenikov, Yu. (Dubna, JINR) ; Stoynev, S. (Dubna, JINR ; Fermilab) ; Zinchenko, A. (Dubna, JINR) ; Monnier, E. (Chicago U., EFI ; Marseille, CPPM) ; Swallow, E. (Chicago U., EFI) ; Winston, R. (Chicago U., EFI ; UC, Merced) ; Rubin, P. (Edinburgh U. ; George Mason U., SPACS) ; Walker, A. (Edinburgh U.) ; Baldini, W. (Ferrara U.) ; Cotta Ramusino, A. (Ferrara U.) ; Dalpiaz, P. (Ferrara U.) ; Damiani, C. (Ferrara U.) ; Fiorini, M. (Ferrara U.) ; Gianoli, A. (Ferrara U.) ; Martini, M. (Ferrara U.) ; Petrucci, F. (Ferrara U.) ; Savrié, M. (Ferrara U.) ; Scarpa, M. (Ferrara U.) ; Wahl, H. (Ferrara U.) ; Bizzeti, A. (INFN, Florence ; Modena U.) ; Lenti, M. (INFN, Florence) ; Veltri, M. (INFN, Florence ; Urbino U.) ; Calvetti, M. (Florence U.) ; Celeghini, E. (Florence U.) ; Iacopini, E. (Florence U.) ; Ruggiero, G. (Florence U. ; Liverpool U.) ; Behler, M. (Mainz U., Inst. Phys.) ; Eppard, K. (Mainz U., Inst. Phys.) ; Kleinknecht, K. (Mainz U., Inst. Phys.) ; Marouelli, P. (Mainz U., Inst. Phys.) ; Masetti, L. (Mainz U., Inst. Phys.) ; Moosbrugger, U. (Mainz U., Inst. Phys.) ; Morales Morales, C. (Mainz U., Inst. Phys. ; Helmholtz Inst., Mainz) ; Renk, B. (Mainz U., Inst. Phys.) ; Wache, M. (Mainz U., Inst. Phys.) ; Wanke, R. (Mainz U., Inst. Phys.) ; Winhart, A. (Mainz U., Inst. Phys. ; Birmingham U.) ; Coward, D. (Northwestern U. ; SLAC) ; Dabrowski, A. (Northwestern U. ; CERN) ; Fonseca Martin, T. (Northwestern U.) ; Shieh, M. (Northwestern U.) ; Szleper, M. (Northwestern U. ; NCBJ, Swierk) ; Velasco, M. (Northwestern U.) ; Wood, M.D. (Northwestern U. ; SLAC) ; Cenci, P. (INFN, Perugia) ; Pepe, M. (INFN, Perugia) ; Petrucci, M.C. (INFN, Perugia) ; Anzivino, G. (Perugia U.) ; Imbergamo, E. (Perugia U.) ; Nappi, A. (Perugia U.) ; Piccini, M. (Perugia U.) ; Raggi, M. (Perugia U. ; U. Rome La Sapienza (main)) ; Valdata-Nappi, M. (Perugia U.) ; Cerri, C. (INFN, Pisa) ; Fantechi, R. (INFN, Pisa) ; Collazuol, G. (INFN, Pisa ; Pisa, Scuola Normale Superiore ; Padua U. ; INFN, Padua) ; DiLella, L. (INFN, Pisa ; Pisa, Scuola Normale Superiore ; Pisa U.) ; Lamanna, G. (INFN, Pisa ; Pisa, Scuola Normale Superiore ; Pisa U.) ; Mannelli, I. (INFN, Pisa ; Pisa, Scuola Normale Superiore) ; Michetti, A. (INFN, Pisa ; Pisa, Scuola Normale Superiore) ; Costantini, F. (Pisa U.) ; Doble, N. (Pisa U.) ; Fiorini, L. (Pisa U. ; Valencia U., IFIC) ; Giudici, S. (Pisa U.) ; Pierazzini, G. (Pisa U.) ; Sozzi, M. (Pisa U.) ; Venditti, S. (Pisa U.) ; Bloch-Devaux, B. (IRFU, Saclay ; Turin U.) ; Cheshkov, C. (IRFU, Saclay ; Lyon, IPN) ; Chèze, J.B. (IRFU, Saclay) ; De Beer, M. (IRFU, Saclay) ; Derré, J. (IRFU, Saclay) ; Marel, G. (IRFU, Saclay) ; Mazzucato, E. (IRFU, Saclay) ; Peyaud, B. (IRFU, Saclay) ; Vallage, B. (IRFU, Saclay) ; Holder, M. (Siegen U.) ; Ziolkowski, M. (Siegen U.) ; Biino, C. (INFN, Turin) ; Cartiglia, N. (INFN, Turin) ; Marchetto, F. (INFN, Turin) ; Bifani, S. (INFN, Turin ; Turin U. ; Birmingham U.) ; Clemencic, M. (INFN, Turin ; Turin U. ; CERN) ; Goy Lopez, S. (INFN, Turin ; Turin U. ; Madrid, CIEMAT) ; Dibon, H. (Vienna, OAW) ; Jeitler, M. (Vienna, OAW) ; Markytan, M. (Vienna, OAW) ; Mikulec, I. (Vienna, OAW) ; Neuhofer, G. (Vienna, OAW) ; Widhalm, L. (Vienna, OAW)

Publication 2017-06-10
Imprint 14 Dec 2016
Number of pages 10
Note 15 pages, accepted for publication in Physics Letters B
In: Phys. Lett. B 769 (2017) 67-76
DOI 10.1016/j.physletb.2017.03.029
Subject category hep-ex ; Particle Physics - Experiment
Accelerator/Facility, Experiment CERN SPS ; NA48/2
Free keywords electroweak interaction ; flavor physics ; exotics ; rare decay ; particle and resonance production ; conservation law tests ; experimental results ; Lepton number violation ; Heavy neutral lepton ; Inflaton
Abstract The NA48/2 experiment at CERN collected a large sample of charged kaon decays to final states with multiple charged particles in 2003--2004. A new upper limit on the rate of the lepton number violating decay $K^{\pm}\to\pi^{\mp}\mu^{\pm}\mu^{\pm}$ is reported: $\mathcal{B}(K^{\pm}\to\pi^{\mp}\mu^{\pm}\mu^{\pm})<8.6 \times 10^{-11}$ at 90% CL. Searches for two-body resonances $X$ in $K^{\pm}\to\pi\mu\mu$ decays (such as heavy neutral leptons $N_4$ and inflatons $\chi$) are also presented. In the absence of signals, upper limits are set on the products of branching fractions $\mathcal{B}(K^{\pm}\to\mu^{\pm}N_4)\mathcal{B}(N_4\to\pi\mu)$ and $\mathcal{B}(K^{\pm}\to\pi^{\pm}X)\mathcal{B}(X\to\mu^+\mu^-)$ for ranges of assumed resonance masses and lifetimes. The limits are in the $(10^{-11},10^{-9})$ range for resonance lifetimes below 100 ps.
Copyright/License arXiv nonexclusive-distrib. 1.0
preprint: © 2016-2024 CERN (License: CC-BY-4.0)
publication: © 2017-2024 The Author(s) (License: CC-BY-4.0), sponsored by SCOAP³



Corresponding record in: Inspire
Email contact: brigitte.bloch-devaux@cern.ch


 Datensatz erzeugt am 2016-12-17, letzte Änderung am 2023-08-03


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arXiv:1612.04723 - Volltext herunterladenPDF
fermilab-pub-16-700-td - Volltext herunterladenPDF