Lines and boxes: Unmasking Dynamical Dark Matter through correlations in the MeV gamma-ray spectrum

Boddy, Kimberly K.; Dienes, Keith R.; Kim, Doojin; Kumar, Jason; Park, Jong-Chul; Thomas, Brooks

doi:10.1103/PhysRevD.94.095027

Title: Lines and boxes: Unmasking Dynamical Dark Matter through correlations in the MeV gamma-ray spectrum

Journal Article · Wed Nov 30 00:00:00 EST 2016 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.94.095027· OSTI ID:1598646

Boddy, Kimberly K. ^[1]; Dienes, Keith R. ^[2]; Kim, Doojin ^[3]; Kumar, Jason ^[1]; Park, Jong-Chul ^[4]; Thomas, Brooks ^[5]

Univ. of Hawaii, Honolulu, HI (United States)
Univ. of Arizona, Tucson, AZ (United States); Univ. of Maryland, College Park, MD (United States)
Univ. of Florida, Gainesville, FL (United States)
Chungnam National Univ., Daejeon (Korea)
Colorado College, Colorado Springs, CO (United States); Lafayette College, Easton, PA (United States)

Identifying signatures of dark matter at indirect-detection experiments is generally more challenging for scenarios involving non-minimal dark sectors such as Dynamical Dark Matter (DDM) than for scenarios involving a single dark particle. This additional difficulty arises because the partitioning of the total dark-matter abundance across an ensemble of different constituent particles with different masses tends to "smear" the injection spectra of photons and other cosmic-ray particles that are produced via dark-matter annihilation or decay. As a result, the imprints of the dark sector on these cosmic-ray flux spectra typically take the form of continuum features rather than sharp peaks or lines. In this paper, however, we identify an unambiguous signature of non-minimal dark sectors such as DDM which can overcome these issues and potentially be observed at gamma-ray telescopes operating in the MeV range. Finally, we discuss the specific situations in which this signature can arise, and demonstrate that this signature can be exploited in order to significantly enhance our ability to resolve the unique spectral features of DDM and other non-minimal dark sectors at future gamma-ray facilities.

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Research Organization:: Univ. of Hawaii, Honolulu, HI (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF); National Research Foundation of Korea (NRF)

Grant/Contract Number:: SC0010504; SC0010296; FG02-13ER41976; PHY-1250573; NRF-2013R1A1A2061561; FG02-13ER4197

OSTI ID:: 1598646

Alternate ID(s):: OSTI ID: 1333979

Journal Information:: Physical Review D, Vol. 94, Issue 9; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 25 works

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Long-lived particles at the energy frontier: the MATHUSLA physics case Curtin, David; Drewes, Marco; McCullough, Matthew Reports on Progress in Physics, Vol. 82, Issue 11 https://doi.org/10.1088/1361-6633/ab28d6	journal	October 2019
Boxes, Boosts, and Energy Duality: Understanding the Galactic-Center Gamma-Ray Excess through Dynamical Dark Matter Boddy, Kimberly K.; Dienes, Keith R.; Kim, Doojin arXiv https://doi.org/10.48550/arxiv.1609.09104	text	January 2016
Dynamical Dark Matter from Strongly-Coupled Dark Sectors Dienes, Keith R.; Huang, Fei; Su, Shufang arXiv https://doi.org/10.48550/arxiv.1610.04112	text	January 2016
Long-Lived Particles at the Energy Frontier: The MATHUSLA Physics Case Curtin, David; Drewes, Marco; McCullough, Matthew arXiv https://doi.org/10.48550/arxiv.1806.07396	text	January 2018

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