Analysis of long-lived particle decays with the MATHUSLA detector

Curtin, David; Peskin, Michael E.

doi:10.1103/physrevd.97.015006

Cited by 62 publications

(113 citation statements)

References 87 publications

(107 reference statements)

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“…[18,19] for detailed simulations for SHiP and Refs. [22,23,100,101] for MATHUSLA). In reality, it is very difficult however to completely exclude the possibility of residual background events to take place in the detector.…”

Section: Invisible Higgs Decay and Signal Strengthmentioning

confidence: 99%

Direct detection and complementary constraints for sub-GeV dark matter

Bondarenko

Boyarsky

Bringmann

et al. 2020

J. High Energ. Phys.

100

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Traditional direct searches for dark matter, looking for nuclear recoils in deep underground detectors, are challenged by an almost complete loss of sensitivity for light dark matter particles. Consequently, there is a significant effort in the community to devise new methods and experiments to overcome these difficulties, constantly pushing the limits of the lowest dark matter mass that can be probed this way. From a model-building perspective, the scattering of sub-GeV dark matter on nucleons essentially must proceed via new light mediator particles, given that collider searches place extremely stringent bounds on contact-type interactions. Here we present an updated compilation of relevant limits for the case of a scalar mediator, including a new estimate of the near-future sensitivity of the NA62 experiment as well as a detailed evaluation of limits from Big Bang nucleosynthesis. We also derive updated and more general limits on DM particles upscattered by cosmic rays, applicable to arbitrary energy-and momentum dependences of the scattering cross section. Finally we stress that dark matter self-interactions place stringent limits independently of the dark matter production mechanism. These are, for the relevant parameter space, generically comparable to those that apply in the commonly studied freeze-out case. We conclude that the combination of existing (or expected) constraints from accelerators and astrophysics, combined with cosmological requirements, puts robust limits on the maximally possible nuclear scattering rate. In most regions of parameter space these are at least competitive with the best projected limits from currently planned direct detection experiments.arXiv:1909.08632v2 [hep-ph]

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Section: Invisible Higgs Decay and Signal Strengthmentioning

confidence: 99%

Direct detection and complementary constraints for sub-GeV dark matter

Bondarenko

Boyarsky

Bringmann

et al. 2020

J. High Energ. Phys.

100

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“…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%

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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“…With the current preliminary design [21,35], it is unclear whether MATHUSLA would have sufficient sensitivity to the E X ∼ Oð100 MeVÞ particles coming from soft kaon decay products to uncover new physics there. However, it is worth considering potential design modifications, such as additional tracking, calorimetry, or small magnetic fields, that would augment both low-energy sensitivity and the ability to discriminate backgrounds in this region.…”

Section: Discussionmentioning

confidence: 99%

Detecting hidden particles with MATHUSLA

Evans

2018

Phys. Rev. D

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A hidden sector containing light long-lived particles provides a well-motivated place to find new physics. The recently proposed MATHUSLA experiment has the potential to be extremely sensitive to light particles originating from rare meson decays in the very long lifetime region. In this work, we illustrate this strength with the specific example of a light scalar mixed with the standard model-like Higgs boson, a model where MATHUSLA can further probe unexplored parameter space from exotic Higgs decays. Design augmentations should be considered in order to maximize the ability of MATHUSLA to discover very light hidden sector particles.

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Analysis of long-lived particle decays with the MATHUSLA detector

Cited by 62 publications

References 87 publications

Direct detection and complementary constraints for sub-GeV dark matter

Direct detection and complementary constraints for sub-GeV dark matter

Dark Higgs bosons at the ForwArd Search ExpeRiment

Detecting hidden particles with MATHUSLA

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