constraints on primordial black holes and particle dark matter
Abstract
The International Gamma-Ray Astrophysics Laboratory (INTEGRAL) satellite has yielded unprecedented measurements of the soft gamma-ray spectrum of our Galaxy. Here we use those measurements to set constraints on dark matter (DM) that decays or annihilates into photons with energies E ≈ 0.02–2 MeV. First, we revisit the constraints on particle DM that decays or annihilates to photon pairs. In particular, for decaying DM, we find that previous limits were overstated by roughly an order of magnitude. Our new, conservative analysis finds that the DM lifetime must satisfy τ ≳ 5 × 1026 s × (mχ/MeV)–1 for DM masses mχ = 0.054–3.6 MeV. For MeV-scale DM that annihilates into photons INTEGRAL sets the strongest constraints to date. Second, we target ultralight primordial black holes (PBHs) through their Hawking radiation. This makes them appear as decaying DM with a photon spectrum peaking at E ≈ 5.77/(8πGMPBH), for a PBH of mass MPBH. We use the INTEGRAL data to demonstrate that, at 95% C.L., PBHs with masses less than 1.2 × 1017 g cannot comprise all of the DM, setting the tightest bound to date on ultralight PBHs.
- Publication Date:
- Research Org.:
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1633464
- Alternate Identifier(s):
- OSTI ID: 1712443
- Grant/Contract Number:
- SC00012567; SC0013999; SC0012567
- Resource Type:
- Published Article
- Journal Name:
- Physical Review. D.
- Additional Journal Information:
- Journal Name: Physical Review. D. Journal Volume: 101 Journal Issue: 12; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; Cosmology; Dark matter; Gamma ray astronomy; Particle dark matter
Citation Formats
Laha, Ranjan, Muñoz, Julian B., and Slatyer, Tracy R. I N T E G R A L constraints on primordial black holes and particle dark matter. United States: N. p., 2020.
Web. doi:10.1103/PhysRevD.101.123514.
Laha, Ranjan, Muñoz, Julian B., & Slatyer, Tracy R. I N T E G R A L constraints on primordial black holes and particle dark matter. United States. https://doi.org/10.1103/PhysRevD.101.123514
Laha, Ranjan, Muñoz, Julian B., and Slatyer, Tracy R. Mon .
"I N T E G R A L constraints on primordial black holes and particle dark matter". United States. https://doi.org/10.1103/PhysRevD.101.123514.
@article{osti_1633464,
title = {I N T E G R A L constraints on primordial black holes and particle dark matter},
author = {Laha, Ranjan and Muñoz, Julian B. and Slatyer, Tracy R.},
abstractNote = {The International Gamma-Ray Astrophysics Laboratory (INTEGRAL) satellite has yielded unprecedented measurements of the soft gamma-ray spectrum of our Galaxy. Here we use those measurements to set constraints on dark matter (DM) that decays or annihilates into photons with energies E ≈ 0.02–2 MeV. First, we revisit the constraints on particle DM that decays or annihilates to photon pairs. In particular, for decaying DM, we find that previous limits were overstated by roughly an order of magnitude. Our new, conservative analysis finds that the DM lifetime must satisfy τ ≳ 5 × 1026 s × (mχ/MeV)–1 for DM masses mχ = 0.054–3.6 MeV. For MeV-scale DM that annihilates into photons INTEGRAL sets the strongest constraints to date. Second, we target ultralight primordial black holes (PBHs) through their Hawking radiation. This makes them appear as decaying DM with a photon spectrum peaking at E ≈ 5.77/(8πGMPBH), for a PBH of mass MPBH. We use the INTEGRAL data to demonstrate that, at 95% C.L., PBHs with masses less than 1.2 × 1017 g cannot comprise all of the DM, setting the tightest bound to date on ultralight PBHs.},
doi = {10.1103/PhysRevD.101.123514},
journal = {Physical Review. D.},
number = 12,
volume = 101,
place = {United States},
year = {Mon Jun 15 00:00:00 EDT 2020},
month = {Mon Jun 15 00:00:00 EDT 2020}
}
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https://doi.org/10.1103/PhysRevD.101.123514
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