Model agnostic probes of dark sectors at neutrino experiments

Costa, Marco; Mishra, Rashmish K.; Verma, Sonali

doi:10.1103/physrevd.108.035041

Phys. Rev. D

2023

DOI: 10.1103/physrevd.108.035041

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Model agnostic probes of dark sectors at neutrino experiments

Marco Costa,

Rashmish K. Mishra,

Sonali Verma

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2024

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Cited by 2 publications

References 128 publications

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Long-lived neutral fermions at the DUNE near detector

Günther,

de Vries,

Dreiner

et al. 2024

J. High Energ. Phys.

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At the Deep Underground Neutrino Experiment (DUNE), a proton beam hits a fixed target leading to large production rates of mesons. These mesons can decay and potentially provide a source of long-lived neutral fermions. Examples of such long-lived fermions are heavy neutral leptons which can mix with the standard-model active neutrinos, and the bino-like lightest neutralino in R-parity-violating supersymmetry. We show that the Standard Model Effective Field Theory extended with right-handed singlet neutrinos can simultaneously describe heavy neutral leptons and bino-like neutralinos in a unified manner. We use the effective-field-theory framework to determine the sensitivity reach of the DUNE near detector in probing various scenarios of long-lived neutral fermions.

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Long-lived neutral fermions at the DUNE near detector

Günther,

de Vries,

Dreiner

et al. 2024

J. High Energ. Phys.

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Discovering long-lived particles at DUNE

Coloma,

Martín-Albo,

Urrea

2024

Phys. Rev. D

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Long-lived particles (LLPs) arise in many theories beyond the Standard Model. These may be copiously produced from meson decays (or through their mixing with the LLPs) at neutrino facilities and leave a visible decay signal in nearby neutrino detectors. We compute the expected sensitivity of the DUNE liquid argon (LAr) and gaseous argon near detectors (NDs) to light LLP decays. In doing so, we determine the expected backgrounds for both detectors, which have been largely overlooked in the literature, taking into account their angular and energy resolution. We show that searches for LLP decays into muon pairs, or into three pions, would be extremely clean. Conversely, decays into two photons would be affected by large backgrounds from neutrino interactions for both near detectors; finally, the reduced signal efficiency for e+e− pairs leads to a reduced sensitivity for ND-LAr. Our results are first presented in a model-independent way, as a function of the mass of the new state and its lifetime. We also provide detailed calculations for several phenomenological models with axionlike particles (coupled to gluons, electroweak bosons, or quark currents). Some of our results may also be of interest for other neutrino facilities using a similar detector technology (e.g., MicroBooNE, SBND, ICARUS, or the T2K near detector). Published by the American Physical Society 2024

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Model agnostic probes of dark sectors at neutrino experiments

Cited by 2 publications

References 128 publications

Long-lived neutral fermions at the DUNE near detector

Long-lived neutral fermions at the DUNE near detector

Discovering long-lived particles at DUNE

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