Indirect detection constraints on s- and t-channel simplified models of dark matter
Abstract
Recent Fermi-LAT observations of dwarf spheroidal galaxies in the Milky Way have placed strong limits on the gamma-ray flux from dark matter annihilation. In order to produce the strongest limit on the dark matter annihilation cross-section, the observations of each dwarf galaxy have typically been "stacked" in a joint-likelihood analysis, utilizing optical observations to constrain the dark matter density profile in each dwarf. These limits have normally been computed only for singular annihilation final states, such as $$b\bar{b}$$ or $$\tau^+\tau^-$$. In this paper, we generalize this approach by producing an independent joint-likelihood analysis to set constraints on models where the dark matter particle annihilates to multiple final state fermions. We interpret these results in the context of the most popular simplified models, including those with s- and t-channel dark matter annihilation through scalar and vector mediators. We introduce our findings as constraints on the minimum dark matter mass and the mediator sector parameters. Additionally, we compare our simplified model results to those of Effective Field Theory contact interactions in the high-mass limit.
- Authors:
-
- The Ohio State Univ., Columbus, OH (United States)
- Publication Date:
- Research Org.:
- The Ohio State Univ., Columbus, OH (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP); National Aeronautics and Space Administration
- OSTI Identifier:
- 1602506
- Alternate Identifier(s):
- OSTI ID: 1325844
- Grant/Contract Number:
- SC0011726; PF3-140110; SC0013529
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Physical Review D
- Additional Journal Information:
- Journal Volume: 94; Journal Issue: 5; 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
Citation Formats
Carpenter, Linda M., Colburn, Russell, Goodman, Jessica, and Linden, Tim. Indirect detection constraints on s- and t-channel simplified models of dark matter. United States: N. p., 2016.
Web. doi:10.1103/PhysRevD.94.055027.
Carpenter, Linda M., Colburn, Russell, Goodman, Jessica, & Linden, Tim. Indirect detection constraints on s- and t-channel simplified models of dark matter. United States. https://doi.org/10.1103/PhysRevD.94.055027
Carpenter, Linda M., Colburn, Russell, Goodman, Jessica, and Linden, Tim. 2016.
"Indirect detection constraints on s- and t-channel simplified models of dark matter". United States. https://doi.org/10.1103/PhysRevD.94.055027. https://www.osti.gov/servlets/purl/1602506.
@article{osti_1602506,
title = {Indirect detection constraints on s- and t-channel simplified models of dark matter},
author = {Carpenter, Linda M. and Colburn, Russell and Goodman, Jessica and Linden, Tim},
abstractNote = {Recent Fermi-LAT observations of dwarf spheroidal galaxies in the Milky Way have placed strong limits on the gamma-ray flux from dark matter annihilation. In order to produce the strongest limit on the dark matter annihilation cross-section, the observations of each dwarf galaxy have typically been "stacked" in a joint-likelihood analysis, utilizing optical observations to constrain the dark matter density profile in each dwarf. These limits have normally been computed only for singular annihilation final states, such as $b\bar{b}$ or $\tau^+\tau^-$. In this paper, we generalize this approach by producing an independent joint-likelihood analysis to set constraints on models where the dark matter particle annihilates to multiple final state fermions. We interpret these results in the context of the most popular simplified models, including those with s- and t-channel dark matter annihilation through scalar and vector mediators. We introduce our findings as constraints on the minimum dark matter mass and the mediator sector parameters. Additionally, we compare our simplified model results to those of Effective Field Theory contact interactions in the high-mass limit.},
doi = {10.1103/PhysRevD.94.055027},
url = {https://www.osti.gov/biblio/1602506},
journal = {Physical Review D},
issn = {2470-0010},
number = 5,
volume = 94,
place = {United States},
year = {Wed Sep 21 00:00:00 EDT 2016},
month = {Wed Sep 21 00:00:00 EDT 2016}
}
Web of Science
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