Indirect detection of the partial wave via the wave in the annihilation cross section of dark matter
Abstract
For many dark matter models, the annihilation cross section to two-body final states is difficult to probe with current experiments because the dominant annihilation channel is velocity or helicity suppressed. The inclusion of gauge boson radiation for three-body final states can lift the helicity suppression, allowing a velocity-independent cross section to dominate the annihilation process, and providing an avenue to constrain these models. Here we examine experimental constraints on dark matter that annihilates to two leptons plus a bremsstrahlung boson, ℓ¯ + ℓ + γ/W/Z. We consider experimental constraints on photon final states from Fermi-LAT using both diffuse photon data and data from dwarf spheroidal galaxies, and compare to the implied constraints from 21 cm measurements. Diffuse photon line searches are generally the strongest over the entire mass regime. We in particular highlight the model in which dark matter annihilates to two neutrinos and a photon, and show that these models are more strongly constrained through photon measurements than through existing neutrino bounds.
- Authors:
- Publication Date:
- Research Org.:
- Texas A & M Univ., College Station, TX (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC); National Science Foundation (NSF)
- OSTI Identifier:
- 1505881
- Alternate Identifier(s):
- OSTI ID: 1611535
- Grant/Contract Number:
- de-sc0010813; SC0010813; PHY-1820801
- Resource Type:
- Published Article
- Journal Name:
- Physical Review D
- Additional Journal Information:
- Journal Name: Physical Review D Journal Volume: 99 Journal Issue: 8; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; Astronomy & Astrophysics; Physics; Dark matter; Particle astrophysics
Citation Formats
Clark, Steven J., Dent, James B., Dutta, Bhaskar, and Strigari, Louis E. Indirect detection of the partial p wave via the s wave in the annihilation cross section of dark matter. United States: N. p., 2019.
Web. doi:10.1103/PhysRevD.99.083003.
Clark, Steven J., Dent, James B., Dutta, Bhaskar, & Strigari, Louis E. Indirect detection of the partial p wave via the s wave in the annihilation cross section of dark matter. United States. https://doi.org/10.1103/PhysRevD.99.083003
Clark, Steven J., Dent, James B., Dutta, Bhaskar, and Strigari, Louis E. Tue .
"Indirect detection of the partial p wave via the s wave in the annihilation cross section of dark matter". United States. https://doi.org/10.1103/PhysRevD.99.083003.
@article{osti_1505881,
title = {Indirect detection of the partial p wave via the s wave in the annihilation cross section of dark matter},
author = {Clark, Steven J. and Dent, James B. and Dutta, Bhaskar and Strigari, Louis E.},
abstractNote = {For many dark matter models, the annihilation cross section to two-body final states is difficult to probe with current experiments because the dominant annihilation channel is velocity or helicity suppressed. The inclusion of gauge boson radiation for three-body final states can lift the helicity suppression, allowing a velocity-independent cross section to dominate the annihilation process, and providing an avenue to constrain these models. Here we examine experimental constraints on dark matter that annihilates to two leptons plus a bremsstrahlung boson, ℓ¯ + ℓ + γ/W/Z. We consider experimental constraints on photon final states from Fermi-LAT using both diffuse photon data and data from dwarf spheroidal galaxies, and compare to the implied constraints from 21 cm measurements. Diffuse photon line searches are generally the strongest over the entire mass regime. We in particular highlight the model in which dark matter annihilates to two neutrinos and a photon, and show that these models are more strongly constrained through photon measurements than through existing neutrino bounds.},
doi = {10.1103/PhysRevD.99.083003},
journal = {Physical Review D},
number = 8,
volume = 99,
place = {United States},
year = {Tue Apr 09 00:00:00 EDT 2019},
month = {Tue Apr 09 00:00:00 EDT 2019}
}
https://doi.org/10.1103/PhysRevD.99.083003
Web of Science
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