A Letter of Intent for MATHUSLA: a dedicated displaced vertex detector above ATLAS or CMS.

Alpigiani, C.; Ball, A. H.; Barak, L.; Beacham, J. B.; Benhammo, Yan; Cao, T.; Camarri, P.; Cardarelli, R.; Rodrı́guez-Cahuantzi, Mario; Chou, J. P.; Curtin, David; Diamond, M.; Sciascio, G. Di; Drewes, Marco; Eno, S. C.; Etzion, E.; Essig, Rouven; Evans, J.A.; Fischer, Oliver; Giagu, S.; Gomes, Brandon; Haas, A.; Heng, Y. K.; Iaselli, G.; Johns, K.; Karagöz, M.; Kasper, Luke; Kvam, A. K.; Lazic, D.; Li, Liang; Liberti, B.; Liu, Zhen; Lubatti, H. J.; Marsella, G.; McCullough, Matthew; McKeen, David; Meade, Patrick; Mizrachi, Gilad; Morrissey, David E.; Moshe, M.; Caballero-Mora, K. S.; Mamani, Piter A. Paye; Policicchio, A.; Proffitt, M. L.; Reggiani-Guzzo, M.; Rothberg, J.; Santonico, R.; Schioppa, M.; Shelton, Jessie; Shuve, Brian; Vásquez, M. A. Subieta; Stolarski, Daniel; Roeck, A. De; Téllez, A. Fernández; Muñoz, G. Tejeda; Hernández, Mario Iván Martínez; Silver, Y.; Thayil, S. A.; Torro, Emma; Tsai, Y. T.; Arteaga‐Velázquez, J. C.; Watts, G.; Young, C.; Zurita, José

doi:10.2172/1493061

Cited by 36 publications

(49 citation statements)

References 286 publications

(564 reference statements)

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“…Our proposal is driven by the approach to fully exploit the discovery potential of the existing detectors to make optimal use of CERN's resources and infrastructure. This approach is complementary to proposals that aim to improve the sensitivity of the LHC to LLPs by adding new detectors, including the recently approved FASER experiment [12] and other dedicated detectors, such as MATHUSLA [13][14][15], CODEX-b [16] and Al3X [17]. A summary of our main results is presented in reference [18].…”

Section: Introductionmentioning

confidence: 83%

New long-lived particle searches in heavy-ion collisions at the LHC

et al. 2020

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We show that heavy ion collisions at the LHC provide a promising environment to search for signatures with displaced vertices in well-motivated New Physics scenarios. Compared to proton collisions, they offer several advantages, i) the number of parton level interactions per collision is larger, ii) there is no pile-up, iii) the lower instantaneous luminosity compared to proton collisions allows to operate the LHC experiments with very loose triggers, and iv) there are new production mechanisms that are absent in proton collisions. In the present work we focus on the third point and show that the modification of the triggers alone can increase the number of observable events by orders of magnitude if the long lived particles are predominantly produced with low transverse momentum. Our results show that collisions of ions lighter than lead are well-motivated from the viewpoint of searches for New Physics. We illustrate this for the example of heavy neutrinos in the Neutrino Minimal Standard Model.

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Section: Introductionmentioning

confidence: 83%

New long-lived particle searches in heavy-ion collisions at the LHC

et al. 2020

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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.

101

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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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“…1. However, it may be interesting to check the detectability in the other future experiment such as MATHUSLA [44,45], CODEX-b [46] and FASER [47,48] or in the search for long-lived particles through displaced [49] or delayed [50] tracks in the LHC experiments.…”

Section: Alpino In the Fixed Target Experimentsmentioning

confidence: 99%

Searching for axino-like particle at fixed target experiments

Choi

Inami

Kadota

et al. 2020

Physics of the Dark Universe

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We investigate the detectability of axino-like particle, which is defined as a supersymmetric partner of axion-like particle and can be a good candidate for dark matter in our Universe. Especially, we consider the fixed target experiments to search for the light axino-like particle with a neutralino as the next-to-lightest supersymmetric particle. We calculate the production and decay rate of neutralinos and the consequent number of events (such as photons and charged leptons) that are produced when the neutralinos decay to the axino-like particles.

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A Letter of Intent for MATHUSLA: a dedicated displaced vertex detector above ATLAS or CMS.

Cited by 36 publications

References 286 publications

New long-lived particle searches in heavy-ion collisions at the LHC

New long-lived particle searches in heavy-ion collisions at the LHC

Direct detection and complementary constraints for sub-GeV dark matter

Searching for axino-like particle at fixed target experiments

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