Lines and boxes: Unmasking Dynamical Dark Matter through correlations in the MeV gamma-ray spectrum
Abstract
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.
- Authors:
-
- 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)
- Publication Date:
- Research Org.:
- Univ. of Hawaii, Honolulu, HI (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF); National Research Foundation of Korea (NRF)
- OSTI Identifier:
- 1598646
- Alternate Identifier(s):
- OSTI ID: 1333979
- Grant/Contract Number:
- SC0010504; SC0010296; FG02-13ER41976; PHY-1250573; NRF-2013R1A1A2061561; FG02-13ER4197
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review D
- Additional Journal Information:
- Journal Volume: 94; Journal Issue: 9; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 79 ASTRONOMY AND ASTROPHYSICS; Particle dark matter; Weakly interacting massive particles
Citation Formats
Boddy, Kimberly K., Dienes, Keith R., Kim, Doojin, Kumar, Jason, Park, Jong-Chul, and Thomas, Brooks. Lines and boxes: Unmasking Dynamical Dark Matter through correlations in the MeV gamma-ray spectrum. United States: N. p., 2016.
Web. doi:10.1103/PhysRevD.94.095027.
Boddy, Kimberly K., Dienes, Keith R., Kim, Doojin, Kumar, Jason, Park, Jong-Chul, & Thomas, Brooks. Lines and boxes: Unmasking Dynamical Dark Matter through correlations in the MeV gamma-ray spectrum. United States. https://doi.org/10.1103/PhysRevD.94.095027
Boddy, Kimberly K., Dienes, Keith R., Kim, Doojin, Kumar, Jason, Park, Jong-Chul, and Thomas, Brooks. Wed .
"Lines and boxes: Unmasking Dynamical Dark Matter through correlations in the MeV gamma-ray spectrum". United States. https://doi.org/10.1103/PhysRevD.94.095027. https://www.osti.gov/servlets/purl/1598646.
@article{osti_1598646,
title = {Lines and boxes: Unmasking Dynamical Dark Matter through correlations in the MeV gamma-ray spectrum},
author = {Boddy, Kimberly K. and Dienes, Keith R. and Kim, Doojin and Kumar, Jason and Park, Jong-Chul and Thomas, Brooks},
abstractNote = {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.},
doi = {10.1103/PhysRevD.94.095027},
journal = {Physical Review D},
number = 9,
volume = 94,
place = {United States},
year = {Wed Nov 30 00:00:00 EST 2016},
month = {Wed Nov 30 00:00:00 EST 2016}
}
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