Abstract
Lepton Flavor Violating (LFV) processes are clear signals of physics beyond the Standard Model. We investigate the possibility of measuring this kind of processes at present and foreseeable future muon-electron colliders, taking into account present day bounds from existing experiments. As a model of new physics we consider a Z’ boson with a U t(1) gauge symmetry and generic couplings. Processes that violate lepton flavor by two units seem to be particularly promising.
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N. Doble, L. Gatignon,G. von Holtey and F. Novokoltsev, The upgraded muon beam at the SPS, Nucl. Instrum. Meth. A 311 (1992) 351.
D. Denisov, V. Evdokimov, S. Lukíc and P. Ujíc, Muon Beam at the Fermilab Test Beam Area, arXiv:1608.03453 [INSPIRE].
Y. Miyake et al., J-PARC muon source, MUSE, Nucl. Instrum. Meth. A 600 (2009) 22 [INSPIRE].
M. Boscolo, J.-P. Delahaye and M. Palmer, The future prospects of muon colliders and neutrino factories, in Reviews of Accelerator Science and Technology: Volume 10: The Future of Accelerators, pp. 189–214 (2019), DOI [arXiv:1808.01858] [INSPIRE].
M.A. Palmer, Muon Accelerator Program (MAP), http://map.fnal.gov.
M.-H. Wang, Y. Nosochkov, Y. Cai and M. Palmer, Design of a 6 TeV Muon Collider, 2016 JINST 11 P09003 [INSPIRE].
M. Antonelli, M. Boscolo, R. Di Nardo and P. Raimondi, Novel proposal for a low emittance muon beam using positron beam on target, Nucl. Instrum. Meth. A 807 (2016) 101 [arXiv:1509.04454] [INSPIRE].
MICE collaboration, Demonstration of cooling by the Muon Ionization Cooling Experiment, Nature 578 (2020) 53 [arXiv:1907.08562] [INSPIRE].
D. Brandt, H. Burkhardt, M. Lamont, S. Myers and J. Wenninger, Accelerator physics at LEP, Rept. Prog. Phys. 63 (2000) 939 [INSPIRE].
ILC collaboration, The International Linear Collider Technical Design Report — Volume 3.II: Accelerator Baseline Design, arXiv:1306.6328 [INSPIRE].
FCC collaboration, FCC-ee: The Lepton Collider: Future Circular Collider Conceptual Design Report Volume 2, Eur. Phys. J. ST 228 (2019) 261 [INSPIRE].
CEPC Study Group collaboration, CEPC Conceptual Design Report: Volume 1 — Accelerator, arXiv:1809.00285 [INSPIRE].
W. Altmannshofer, C.-Y. Chen, P.S. Bhupal Dev and A. Soni, Lepton flavor violating Z’ explanation of the muon anomalous magnetic moment, Phys. Lett. B 762 (2016) 389 [arXiv:1607.06832] [INSPIRE].
A. De Gouvêa, W.-C. Huang, J. König and M. Sen, Accessible Lepton-Number-Violating Models and Negligible Neutrino Masses, Phys. Rev. D 100 (2019) 075033 [arXiv:1907.02541] [INSPIRE].
P.S.B. Dev, W. Rodejohann, X.-J. Xu and Y. Zhang, MUonE sensitivity to new physics explanations of the muon anomalous magnetic moment, JHEP 05 (2020) 053 [arXiv:2002.04822] [INSPIRE].
M. Lindner, M. Platscher and F.S. Queiroz, A Call for New Physics: The Muon Anomalous Magnetic Moment and Lepton Flavor Violation, Phys. Rept. 731 (2018) 1 [arXiv:1610.06587] [INSPIRE].
L. Calibbi and G. Signorelli, Charged Lepton Flavour Violation: An Experimental and Theoretical Introduction, Riv. Nuovo Cim. 41 (2018) 71 [arXiv:1709.00294] [INSPIRE].
LHCb collaboration, Search for lepton-universality violation in B+ → K + ℓ+ ℓ− decays, Phys. Rev. Lett. 122 (2019) 191801 [arXiv:1903.09252] [INSPIRE].
A. Crivellin, L. Hofer, J. Matias, U. Nierste, S. Pokorski and J. Rosiek, Lepton-flavour violating B decays in generic Z′ models, Phys. Rev. D 92 (2015) 054013 [arXiv:1504.07928] [INSPIRE].
G. Feinberg and S. Weinberg, Law of Conservation of Muons, Phys. Rev. Lett. 6 (1961) 381 [INSPIRE].
G. Feinberg and S. Weinberg, Conversion of Muonium into Antimuonium, Phys. Rev. 123 (1961) 1439 [INSPIRE].
A. Masiero, P. Paradisi and M. Passera, New physics at the MUonE experiment at CERN, arXiv:2002.05418 [INSPIRE].
L. Willmann et al., New bounds from searching for muonium to anti-muonium conversion, Phys. Rev. Lett. 82 (1999) 49 [hep-ex/9807011] [INSPIRE].
Particle Data Group collaboration, Review of Particle Physics, Phys. Rev. D 98 (2018) 030001 [INSPIRE].
G. Abbiendi, Letter of Intent: the MUonE project, Tech. Rep. CERN-SPSC-2019-026. SPSC-I-252, CERN, Geneva (Jun, 2019).
M. Koike, Y. Kuno, J. Sato and M. Yamanaka, A new idea to search for charged lepton flavor violation using a muonic atom, Phys. Rev. Lett. 105 (2010) 121601 [arXiv:1003.1578] [INSPIRE].
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Bossi, F., Ciafaloni, P. Lepton Flavor Violation at muon-electron colliders. J. High Energ. Phys. 2020, 33 (2020). https://doi.org/10.1007/JHEP10(2020)033
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DOI: https://doi.org/10.1007/JHEP10(2020)033