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

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

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

Identifying signatures of dark matter at indirect-detection experiments is generally more challenging for scenarios involving nonminimal 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 nonminimal dark sectors such as DDM which can overcome these issues and potentially be observed at gamma-ray telescopes operating in the MeV range. 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 nonminimal dark sectors at future gamma-ray facilities.

Original languageEnglish (US)
Article number095027
JournalPhysical Review D
Volume94
Issue number9
DOIs
StatePublished - Nov 30 2016

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Fingerprint Dive into the research topics of 'Lines and boxes: Unmasking Dynamical Dark Matter through correlations in the MeV gamma-ray spectrum'. Together they form a unique fingerprint.

  • Cite this