TY  - JOUR
AU  - Coloma, P.
AU  - Martin-Albo, J.
AU  - Urrea, S.
PY  - 2024
DA  - 2024//
TI  - Discovering long-lived particles at DUNE
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 035013
EP  - 24pp
VL  - 109
IS  - 3
PB  - Amer Physical Soc
AB  - 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 thorn 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).
SN  - 2470-0010
UR  - https://arxiv.org/abs/2309.06492
UR  - https://doi.org/10.1103/PhysRevD.109.035013
DO  - 10.1103/PhysRevD.109.035013
LA  - English
N1  - WOS:001183262300002
ID  - Coloma_etal2024
ER  -