Detecting hidden particles with MATHUSLA

Evans, J.A.

doi:10.1103/physrevd.97.055046

Cited by 66 publications

(102 citation statements)

References 56 publications

(68 reference statements)

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“…The region of parameter space probed by the single and pair production processes are complementary: for currently viable values of λ, there are regions of the ðm ϕ ; θÞ parameter space that can produce pair production signals without single production signals, and vice versa. In this way, FASER is similar to MATHUSLA, which is sensitive to dark Higgs bosons from meson decay and also from pair production in h → ϕϕ [14]. We note, however, that, because the regions of sensitivity to single and double production have significant overlap, if a signal is seen, more detailed work is required to determine its origin or bound particular sources.…”

Section: B Trilinear Coupling Reachmentioning

confidence: 99%

“…The projected reaches [14] of NA62 [10] and the proposed SHiP [11], MATHUSLA [12], and CODEX-b [15] experiments are shown in the bottom right panel of Fig. 5.…”

Section: Mixing Reachmentioning

confidence: 99%

“…In addition, the trilinear scalar coupling hϕϕ, where h is the SM Higgs boson and ϕ is the dark Higgs bosons, can be probed both at FASER, through the double dark Higgs process b → sh Ã → sϕϕ, and through searches for the exotic SM Higgs decays h → ϕϕ. We will evaluate FASER's sensitivity to both ϕ-h mixing and the hϕϕ coupling, and compare them to other current and proposed experiments, such as NA62 [10], SHiP [11], MATHUSLA [12][13][14], and CODEX-b [15]. Throughout this study, we consider FASER in the high luminosity era and assume an integrated luminosity of 3 ab −1 at the 13 TeV LHC.…”

Section: Introductionmentioning

confidence: 99%

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Dark Higgs bosons at the ForwArd Search ExpeRiment

et al. 2018

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FASER, ForwArd Search ExpeRiment at the LHC, has been proposed as a small, very far forward detector to discover new, light, weakly-coupled particles. Previous work showed that with a total volume of just ∼0.1-1 m 3 , FASER can discover dark photons in a large swath of currently unconstrained parameter space, extending the discovery reach of the LHC program. Here we explore FASER's discovery prospects for dark Higgs bosons. These scalar particles are an interesting foil for dark photons, as they probe a different renormalizable portal interaction and are produced dominantly through B and K meson decays, rather than pion decays, leading to less collimated signals. Nevertheless, we find that FASER is also a highly sensitive probe of dark Higgs bosons with significant discovery prospects that are comparable to, and complementary to, much larger proposed experiments.

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Section: B Trilinear Coupling Reachmentioning

confidence: 99%

“…The projected reaches [14] of NA62 [10] and the proposed SHiP [11], MATHUSLA [12], and CODEX-b [15] experiments are shown in the bottom right panel of Fig. 5.…”

Section: Mixing Reachmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dark Higgs bosons at the ForwArd Search ExpeRiment

et al. 2018

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“…(i) A simple estimate shows that the experiments we consider should not be able to improve upon existing limits [57] in the low mass region, see also [10]. And (ii) for Kaons the sensitivity of the experiments will depend strongly on the threshold of the detectors [58], which is currently not well-known. Also, in this subsection we will present our estimates in the particular parameter plane branching ratio versus cτ .…”

Section: Sensitivities For Different Production Modesmentioning

confidence: 99%

Heavy neutral fermions at the high-luminosity LHC

Helo

Hirsch

Wang³

2018

J. High Energ. Phys.

102

109

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Long-lived light particles (LLLPs) appear in many extensions of the standard model. LLLPs are usually motivated by the observed small neutrino masses, by dark matter or both. Typical examples for fermionic LLLPs (a.k.a. heavy neutral fermions, HNFs) are sterile neutrinos or the lightest neutralino in R-parity violating supersymmetry. The high luminosity LHC is expected to deliver up to 3/ab of data. Searches for LLLPs in dedicated experiments at the LHC could then probe the parameter space of LLLP models with unprecedented sensitivity. Here, we compare the prospects of several recent experimental proposals, FASER, CODEX-b and MATHUSLA, to search for HNFs and discuss their relative merits.s

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“…The searches for displaced vertices and long-lived particles at the high energy frontier, i.e. the LHC and proposed dedicated experiments such as MATHUSLA [79,80], and the high intensity experiments like SHiP [11] and DUNE [81] provide excellent motivations to study the light scalars.…”

Section: Jhep03(2018)122mentioning

confidence: 99%

Leptogenesis constraints on B − L breaking Higgs boson in TeV scale seesaw models

Dev¹,

Mohapatra

2018

J. High Energ. Phys.

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In the type-I seesaw mechanism for neutrino masses, there exists a B − L symmetry, whose breaking leads to the lepton number violating mass of the heavy Majorana neutrinos. This would imply the existence of a new neutral scalar associated with the B −L symmetry breaking, analogous to the Higgs boson of the Standard Model. If in such models, the heavy neutrino decays are also responsible for the observed baryon asymmetry of the universe via the leptogenesis mechanism, the new seesaw scalar interactions with the heavy neutrinos will induce additional dilution terms for the heavy neutrino and lepton number densities. We make a detailed study of this dilution effect on the lepton asymmetry in three generic classes of seesaw models with TeV-scale B − L symmetry breaking, namely, in an effective theory framework and in scenarios with global or local U(1) B−L symmetry. We find that requiring successful leptogenesis imposes stringent constraints on the mass and couplings of the new scalar in all three cases, especially when it is lighter than the heavy neutrinos. We also discuss the implications of these new constraints and prospects of testing leptogenesis in presence of seesaw scalars at colliders.

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Detecting hidden particles with MATHUSLA

Cited by 66 publications

References 56 publications

Dark Higgs bosons at the ForwArd Search ExpeRiment

Dark Higgs bosons at the ForwArd Search ExpeRiment

Heavy neutral fermions at the high-luminosity LHC

Leptogenesis constraints on B − L breaking Higgs boson in TeV scale seesaw models

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