Abstract
Abstract
FASER, the ForwArd Search ExpeRiment, is a currently operating experiment at the Large Hadron Collider (LHC) that can detect light long-lived particles produced in the forward region of the LHC interacting point. In this paper, we study the prospect of detecting light CP-even and CP-odd scalars at FASER and FASER 2. Considering a model-independent framework describing the most general interactions between a CP-even or CP-odd scalar and SM particles using the notation of coupling modifiers in the effective Lagrangian, we develop the general formalism for the scalar production and decay. We then analyze the FASER and FASER 2 reaches of light scalars in the large tan β region of the Type-I two Higgs double model as a case study, in which light scalars with relatively long lifetime could be accommodated. In the two benchmark scenarios we considered, the light (pseudo)scalar decay length varies in (10−8, 105) meters. Both FASER and FASER 2 can probe a large part of the parameter space in the large tan β region up to 107, extending beyond the constraints of the other existing experiments.
Publisher
Springer Science and Business Media LLC
Subject
Nuclear and High Energy Physics
Reference202 articles.
1. Y. Gershtein, CMS Hardware Track Trigger: New Opportunities for Long-Lived Particle Searches at the HL-LHC, Phys. Rev. D 96 (2017) 035027 [arXiv:1705.04321] [INSPIRE].
2. J. Liu, Z. Liu and L.-T. Wang, Enhancing Long-Lived Particles Searches at the LHC with Precision Timing Information, Phys. Rev. Lett. 122 (2019) 131801 [arXiv:1805.05957] [INSPIRE].
3. L. Lee, C. Ohm, A. Soffer and T.-T. Yu, Collider Searches for Long-Lived Particles Beyond the Standard Model, Prog. Part. Nucl. Phys. 106 (2019) 210 [Erratum ibid. 122 (2022) 103912] [arXiv:1810.12602] [INSPIRE].
4. J. Alimena et al., Searching for long-lived particles beyond the Standard Model at the Large Hadron Collider, J. Phys. G 47 (2020) 090501 [arXiv:1903.04497] [INSPIRE].
5. J. Liu, Z. Liu, L.-T. Wang and X.-P. Wang, Seeking for sterile neutrinos with displaced leptons at the LHC, JHEP 07 (2019) 159 [arXiv:1904.01020] [INSPIRE].
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