Abstract
FASER is one of the promising experiments which search for long-lived particles beyond the Standard Model. In this paper, we focus on dark photon associating with an additional U(1) gauge symmetry, and also a scalar boson breaking this U(1) gauge symmetry. We study the sensitivity to the dark photon originated from U(1)-breaking scalar decays. We find that a sizable number of dark photon signatures can be expected in wider parameter space than previous studies.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
Change history
14 June 2021
An Erratum to this paper has been published: https://doi.org/10.1007/JHEP06(2021)087
References
J.L. Feng, I. Galon, F. Kling and S. Trojanowski, ForwArd Search ExpeRiment at the LHC, Phys. Rev. D 97 (2018) 035001 [arXiv:1708.09389] [INSPIRE].
FASER collaboration, Technical Proposal for FASER: ForwArd Search ExpeRiment at the LHC, arXiv:1812.09139 [INSPIRE].
FASER collaboration, FASER: ForwArd Search ExpeRiment at the LHC, arXiv:1901.04468 [INSPIRE].
FASER collaboration, FASER’s physics reach for long-lived particles, Phys. Rev. D 99 (2019) 095011 [arXiv:1811.12522] [INSPIRE].
J.L. Feng, I. Galon, F. Kling and S. Trojanowski, Dark Higgs bosons at the ForwArd Search ExpeRiment, Phys. Rev. D 97 (2018) 055034 [arXiv:1710.09387] [INSPIRE].
I. Boiarska, K. Bondarenko, A. Boyarsky, M. Ovchynnikov, O. Ruchayskiy and A. Sokolenko, Light scalar production from Higgs bosons and FASER 2, JHEP 05 (2020) 049 [arXiv:1908.04635] [INSPIRE].
J.L. Feng, I. Galon, F. Kling and S. Trojanowski, Axionlike particles at FASER: The LHC as a photon beam dump, Phys. Rev. D 98 (2018) 055021 [arXiv:1806.02348] [INSPIRE].
N. Okada and D. Raut, Hunting Inflaton at FASER, arXiv:1910.09663 [INSPIRE].
F. Kling and S. Trojanowski, Heavy Neutral Leptons at FASER, Phys. Rev. D 97 (2018) 095016 [arXiv:1801.08947] [INSPIRE].
F. Kling and S. Trojanowski, Looking forward to test the KOTO anomaly with FASER, Phys. Rev. D 102 (2020) 015032 [arXiv:2006.10630] [INSPIRE].
L.B. Okun, Limits of electrodynamics: paraphotons?, Sov. Phys. JETP 56 (1982) 502 [INSPIRE].
P. Galison and A. Manohar, Two Z’s or not two Z’s?, Phys. Lett. B 136 (1984) 279 [INSPIRE].
B. Holdom, Two U(1)’s and Epsilon Charge Shifts, Phys. Lett. B 166 (1986) 196 [INSPIRE].
R. Foot and X.-G. He, Comment on ZZ′ in extended gauge theories, Phys. Lett. B 267 (1991) 509 [INSPIRE].
K.S. Babu, C.F. Kolda and J. March-Russell, Implications of generalized Z − Z′ mixing, Phys. Rev. D 57 (1998) 6788 [hep-ph/9710441] [INSPIRE].
C. Boehm and P. Fayet, Scalar dark matter candidates, Nucl. Phys. B 683 (2004) 219 [hep-ph/0305261] [INSPIRE].
M. Pospelov, Secluded U(1) below the weak scale, Phys. Rev. D 80 (2009) 095002 [arXiv:0811.1030] [INSPIRE].
M. Fabbrichesi, E. Gabrielli and G. Lanfranchi, The Dark Photon, arXiv:2005.01515 [INSPIRE].
K. Jodłowski, F. Kling, L. Roszkowski and S. Trojanowski, Extending the reach of FASER, MATHUSLA, and SHiP towards smaller lifetimes using secondary particle production, Phys. Rev. D 101 (2020) 095020 [arXiv:1911.11346] [INSPIRE].
LHCb collaboration, Search for hidden-sector bosons in B0 → K*0μ+μ− decays, Phys. Rev. Lett. 115 (2015) 161802 [arXiv:1508.04094] [INSPIRE].
LHCb collaboration, Search for long-lived scalar particles in B+ → K+χ(μ+μ−) decays, Phys. Rev. D 95 (2017) 071101 [arXiv:1612.07818] [INSPIRE].
F. Bezrukov and D. Gorbunov, Light inflaton after LHC8 and WMAP9 results, JHEP 07 (2013) 140 [arXiv:1303.4395] [INSPIRE].
M.W. Winkler, Decay and detection of a light scalar boson mixing with the Higgs boson, Phys. Rev. D 99 (2019) 015018 [arXiv:1809.01876] [INSPIRE].
M. Buschmann, J. Kopp, J. Liu and P.A.N. Machado, Lepton Jets from Radiating Dark Matter, JHEP 07 (2015) 045 [arXiv:1505.07459] [INSPIRE].
M. Bauer, P. Foldenauer and J. Jaeckel, Hunting All the Hidden Photons, JHEP 18 (2020) 094 [arXiv:1803.05466] [INSPIRE].
F. Campabadal et al., Beam tests of ATLAS SCT silicon strip detector modules, Nucl. Instrum. Meth. A 538 (2005) 384 [INSPIRE].
FASER collaboration, Letter of Intent for FASER: ForwArd Search ExpeRiment at the LHC, arXiv:1811.10243 [INSPIRE].
W.F. Kling, private communication.
T. Pierog, I. Karpenko, J.M. Katzy, E. Yatsenko and K. Werner, EPOS LHC: Test of collective hadronization with data measured at the CERN Large Hadron Collider, Phys. Rev. C 92 (2015) 034906 [arXiv:1306.0121] [INSPIRE].
C. Baus, T. Pierog and R. Ulrich, Cosmic Ray Monte Carlo (CRMC), https://web.ikp.kit.edu/rulrich/crmc.html.
T. Sjöstrand, S. Mrenna and P.Z. Skands, PYTHIA 6.4 Physics and Manual, JHEP 05 (2006) 026 [hep-ph/0603175] [INSPIRE].
T. Sjöstrand, S. Mrenna and P.Z. Skands, A Brief Introduction to PYTHIA 8.1, Comput. Phys. Commun. 178 (2008) 852 [arXiv:0710.3820] [INSPIRE].
P. Skands, S. Carrazza and J. Rojo, Tuning pythia 8.1: the monash 2013 tune, Eur. Phys. J. C 74 (2014) 3024.
J.H. Chang, R. Essig and S.D. McDermott, Revisiting Supernova 1987A Constraints on Dark Photons, JHEP 01 (2017) 107 [arXiv:1611.03864] [INSPIRE].
F. Kling and S. Trojanowski, private communication and discussion.
BaBar collaboration, Search for a Dark Photon in e+e− Collisions at BaBar, Phys. Rev. Lett. 113 (2014) 201801 [arXiv:1406.2980] [INSPIRE].
NA48/2 collaboration, Search for the dark photon in π0 decays, Phys. Lett. B 746 (2015) 178 [arXiv:1504.00607] [INSPIRE].
NA64 and Physics Beyond Collider Conventional Beams working group collaborations, Status and Plans for the NA64 Experiment, J. Phys. Conf. Ser. 1468 (2020) 012023 [INSPIRE].
KLOE-2 collaboration, Limit on the production of a new vector boson in e+e− → Uγ, U → π+π− with the KLOE experiment, Phys. Lett. B 757 (2016) 356 [arXiv:1603.06086] [INSPIRE].
LHCb collaboration, Search for A′ → μ+μ− Decays, Phys. Rev. Lett. 124 (2020) 041801 [arXiv:1910.06926] [INSPIRE].
E.M. Riordan et al., A Search for Short Lived Axions in an Electron Beam Dump Experiment, Phys. Rev. Lett. 59 (1987) 755 [INSPIRE].
L. Marsicano et al., Dark photon production through positron annihilation in beam-dump experiments, Phys. Rev. D 98 (2018) 015031 [arXiv:1802.03794] [INSPIRE].
J. Blümlein and J. Brunner, New Exclusion Limits on Dark Gauge Forces from Proton Bremsstrahlung in Beam-Dump Data, Phys. Lett. B 731 (2014) 320 [arXiv:1311.3870] [INSPIRE].
Author information
Authors and Affiliations
Corresponding author
Additional information
Publisher’s Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
ArXiv ePrint: 2008.12765
Rights and permissions
Open Access . This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
About this article
Cite this article
Araki, T., Asai, K., Otono, H. et al. Dark photon from light scalar boson decays at FASER. J. High Energ. Phys. 2021, 72 (2021). https://doi.org/10.1007/JHEP03(2021)072
Received:
Revised:
Accepted:
Published:
DOI: https://doi.org/10.1007/JHEP03(2021)072