511&nbsp;keV excess and primordial black holes

Keith, Celeste; Hooper, Dan

doi:10.1103/physrevd.104.063033

511 keV excess and primordial black holes

Journal Article · Tue Sep 21 00:00:00 EDT 2021 · Physical Review D

DOI:https://doi.org/10.1103/physrevd.104.063033· OSTI ID:1831484

Keith, Celeste ^[1]; ^[2]

Univ. of Chicago, IL (United States). Kavli Inst. for Cosmological Physics (KICP); Univ. of Chicago, IL (United States)
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Univ. of Chicago, IL (United States). Kavli Inst. for Cosmological Physics (KICP); Univ. of Chicago, IL (United States)

An excess of 511 keV photons has been detected from the central region of the Milky Way. It has been suggested that the positrons responsible for this signal might be produced through the Hawking evaporation of primordial black holes. After evaluating the constraints from INTEGRAL, COMPTEL, and Voyager 1, we find that black holes in mass range of

~ (1 - 4) \times 10^{16} g

could potentially produce this signal if they make up a small fraction of the total dark matter density. Proposed MeV-scale gamma-ray telescopes such as AMEGO or e-ASTROGAM should be able to test this class of scenarios by measuring the diffuse gamma ray emission from the Milky Way’s inner halo.

View Accepted Manuscript (DOE)

Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Grant/Contract Number:: AC02-07CH11359

OSTI ID:: 1831484

Report Number(s):: FERMILAB-PUB-21-088-T; arXiv:2103.08611; oai:inspirehep.net:1851917

Journal Information:: Physical Review D, Journal Name: Physical Review D Journal Issue: 6 Vol. 104; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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511 keV excess and primordial black holes

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