Multi-track Displaced Vertices at B-Factories

Acevedo, Mason; Blackburn, Albany; Blinov, Nikita; Shuve, Brian; Stone, Mavis

doi:10.48550/arxiv.2105.12744

Cited by 4 publications

(4 citation statements)

References 94 publications

(143 reference statements)

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“…Furthermore, such signatures could also appear in less simplified versions of the typical co-annihilation [56,57] and freeze-in dark matter [58,59] scenarios, involving a non-minimal dark sector with sizable couplings to leptons. Other examples include dark QCD sectors [60] and nonminimal dark photon models [61]. To interpret the upper limits in other frameworks, the efficiency maps are provided across masses and for different lifetimes of the scalar particles in Appendix B.…”

Section: Discussionmentioning

confidence: 99%

Following the muon track of hierarchical sectors at LHCb

Vidal,

Mombächer,

Ramos

et al. 2022

Preprint

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This paper reports a study of the experimental signatures of hierarchical sectors beyond the Standard Model characterized by a flavor-violating heavy vector and a set of light pseudo-Goldstone bosons a 1,2 , spanning a large range of lifetimes. The non-minimal scalar spectrum triggers novel B decays into multiple leptons that would have escaped the reach of current searches. Novel displaced vertex analyses at LHCb are therefore discussed to probe the hierarchical new physics, extending the scope of the tracking system of the detector. Additionally, the reach of the proposed CODEX-b experiment is studied as well. By exploiting the use of tracks only reconstructed in subsystems of the detector at the high-level LHCb trigger, B(B 0 s → a 1 a 2 ) < 10 −8 and B(B + → K + a 1 a 2 ) < 10 −9 could be reached in the muon channel across seven orders of magnitude in the lifetime of the Goldstone bosons. Correspondingly, heavy-light particle couplings of order 1 could be tested, potentially ruling out composite Higgs scenarios where the heavy and light sectors couple strongly.

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Section: Discussionmentioning

confidence: 99%

Following the muon track of hierarchical sectors at LHCb

Vidal,

Mombächer,

Ramos

et al. 2022

Preprint

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“…Besides the SBN program, there are number of existing and proposed experiments on the horizon that can probe the iDM model. In the near future, Belle-II [115] will significantly improve on the BaBar limits, particularly with dedicated searches for displaced decays [54,56,114,116].…”

Section: B Small Splitting Regionmentioning

confidence: 99%

Inelastic Dark Matter at the Fermilab Short Baseline Neutrino Program

Batell,

Berger,

Darmé

et al. 2021

Preprint

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We study the sensitivity of the Fermilab Short-Baseline Neutrino (SBN) experiments, Micro-BooNE, ICARUS, and SBND, to MeV-to GeV-scale inelastic dark matter interacting through a dark photon mediator. These models provide interesting scenarios of light thermal dark matter, which, while challenging to probe with direct and indirect detection experiments, are amenable to accelerator-based searches. We consider production of the dark sector states with both the Fermilab Booster 8 GeV and NuMI 120 GeV proton beams and study the signatures of scattering and decay of the heavy excited dark state in the SBN detectors. These distinct signatures probe complementary regions of parameter space. All three experiments will be able to cover new ground, with an excellent near-term opportunity to search for cosmologically motivated targets explaining the observed dark matter abundance.

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“…Signatures of directly detectable or escaping long-lived particles at B factories have also been discussed in Refs. [30,[44][45][46][47][48][49][50][51][52][53][54][55] This paper is organized as follows: section 2 contains the theoretical framework of the RPV scenario. This includes the effective Lagrangian with the RPV terms and the calculation of the matrix elements, which we estimate using an effective BNV Lagrangian.…”

mentioning

confidence: 99%

Probing $R$-parity violation in $B$-meson decays to a baryon and a light neutralino

Dib¹,

Helo²,

Lyubovitskij³

et al. 2022

Preprint

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We propose a search for B meson decays to a proton or a hyperon plus missing energy at the Belle II experiment to probe supersymmetry with a GeV-scale lightest neutralino χ01 and R-parity violation (RPV). We perform analytic computations of the signal branching fractions in the framework of effective field theory, with a single nonzero RPV operator λ 1j3 Ū c 1 Dc j Dc 3 , where j = 1, 2. The hadronic form factors are calculated using an SU(3) phenomenological Lagrangian approach. Since the decay of the neutralino is kinematically and CKM suppressed in this theoretical scenario, it decays outside the detector and appears experimentally only as missing energy. We detail the analysis techniques at the experimental level and estimate the background in the B + → p χ01 search using published results for B + → K + ν ν. Our final sensitivity plots are shown for both λ 113 versus the squark mass m q and λ 113 /m 2 q versus the neutralino mass m χ0 1 . We find that the search at Belle II could probe λ 113 /m 2 q down to the order of 10 −8 GeV −2 in the kinematically allowed m χ0 1 range. We also obtain current limits on B 0 → Λ 0 χ0 1 by recasting an existing search, and comment about searches for B + → Σ + χ01 and B 0 → Σ 0 χ0 1 . In closing, we briefly discuss potential searches at the LHCb and BESIII experiments.

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Multi-track Displaced Vertices at B-Factories

Cited by 4 publications

References 94 publications

Following the muon track of hierarchical sectors at LHCb

Following the muon track of hierarchical sectors at LHCb

Inelastic Dark Matter at the Fermilab Short Baseline Neutrino Program

Probing $R$-parity violation in $B$-meson decays to a baryon and a light neutralino

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