Optimizing energetic light dark matter searches in dark matter and neutrino experiments
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Springer
Received: March 31, 2020 Accepted: June 16, 2020 Published: July 8, 2020
Optimizing energetic light dark matter searches in dark matter and neutrino experiments a
Mitchell Institute for Fundamental Physics and Astronomy, Department of Physics and Astronomy, Texas A&M University, College Station, TX 77843, U.S.A. b Department of Physics, University of Arizona, Tucson, AZ 85721, U.S.A. c Theory Department, Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510, U.S.A. d Department of Physics and Institute of Quantum Systems (IQS), Chungnam National University, Daejeon 34134, Republic of Korea e Enrico Fermi Institute, University of Chicago, Chicago, IL 60637, U.S.A. f Department of Physics, Jeonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea
E-mail: [email protected], [email protected], [email protected], [email protected] Abstract: Neutrino and dark matter experiments with large-volume (& 1 ton) detectors can provide excellent sensitivity to signals induced by energetic light dark matter coming from the present universe. Taking boosted dark matter as a concrete example of energetic light dark matter, we scrutinize two representative search channels, electron scattering and proton scattering including deep inelastic scattering processes, in the context of elastic and inelastic boosted dark matter, in a completely detector-independent manner. In this work, a dark gauge boson is adopted as the particle to mediate the interactions between the Standard Model particles and boosted dark matter. We find that the signal sensitivity of the two channels highly depends on the (mass-)parameter region to probe, so search strategies and channels should be designed sensibly especially at the earlier stage of experiments. In particular, the contribution from the boosted-dark-matter-initiated deep inelastic scattering can be subleading (important) compared to the quasi-elastic proton scattering, if the mass of the mediator is below (above) O(GeV). We demonstrate how to practically perform searches and relevant analyses, employing example detectors such as DarkSide-20k, DUNE, Hyper-Kamiokande, and DeepCore, with their respective detector specifications taken into consideration. For other potential detectors we provide a summary table, collecting relevant information, from which similar studies can be fulfilled readily. Keywords: Beyond Standard Model, Neutrino Physics ArXiv ePrint: 2003.07369
c The Authors. Open Access, Article funded by SCOAP3 .
https://doi.org/10.1007/JHEP07(2020)057
JHEP07(2020)057
Doojin Kim,a,b Pedro A.N. Machado,c Jong-Chul Parkd and Seodong Shine,f
Contents 1
2 Benchmark models and detectors 2.1 Dark matter models and experimental signatures 2.2 Benchmark detectors
4 4 8
3 Signal cross sections 3.1 p-scattering vs. DIS 3.2 e-scattering vs. p-scattering: basic considerations 3.3 e-scattering vs. p-scattering with realistic effects
11 11 14 18
4 Example data analysis 4.1 DarkSide-20k vs. DUNE 4.2 DUNE vs. HK 4.3 HK vs. DeepCore
23 24 28 30
5 Conclusions
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