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순수물리이론 연구단
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Dark Photon and Muon g-2 Inspired Inelastic Dark Matter Models at the High-Energy Intensity Frontier

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Title
Dark Photon and Muon g-2 Inspired Inelastic Dark Matter Models at the High-Energy Intensity Frontier
Author(s)
Yu-Dai Tsai; Patrick deNiverville; Ming Xiong Liu
Subject
VECTOR GAUGE BOSON, ; PHI-MESON DECAYS, ; PARTICLE-PRODUCTION, ; EXCLUSION LIMITS, ; SEARCH, ; CONSTRAINTS, ; CALIBRATION, ; FORCES, ; PI(0), ; MASS
Publication Date
2021-05-03
Journal
PHYSICAL REVIEW LETTERS, v.126, no.18, pp.181801-1 - 181801-10
Publisher
AMER PHYSICAL SOC
Abstract
We study hidden-sector particles at past (CERN-Hamburg-Amsterdam-Rome-Moscow Collaboration and NuCal), present (NA62, SeaQuest, and DarkQuest), and future (LongQuest) experiments at the high-energy intensity frontier. We focus on exploring the minimal vector portal and the next-to-minimal models in which the productions and decays are decoupled. These next-to-minimal models have mostly been devised to explain experimental anomalies while avoiding existing constraints. We demonstrate that proton fixed-target experiments provide one of the most powerful probes for the MeV to few GeV mass range of these models, using inelastic dark matter (iDM) as an example. We consider an iDM model with a small mass splitting that yields the observed dark matter relic abundance, and a scenario with a sizable mass splitting that can also explain the muon g - 2 anomaly. We set strong limits based on the CERN-Hamburg-Amsterdam-Rome-Moscow Collaboration and NuCal experiments, which come close to excluding iDM as a full-abundance thermal dark matter candidate in the MeV to GeV mass range. We also make projections based on NA62, SeaQuest, and DarkQuest and update the constraints of the minimal dark photon parameter space. We find that NuCal sets the only existing constraint in epsilon similar to 10(-8)-10(-4) regime, reaching similar to 800 MeV in dark photon mass due to the resonant enhancement of proton bremsstrahlung production. These studies also motivate LongQuest, a three-stage retooling of the SeaQuest experiment with short (less than or similar to 5 m), medium (similar to 5 m), and long (greater than or similar to 35 m) baseline tracking stations and detectors as a multipurpose machine to explore new physics.
URI
https://pr.ibs.re.kr/handle/8788114/9735
DOI
10.1103/PhysRevLett.126.181801
ISSN
0031-9007
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > 1. Journal Papers (저널논문)
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