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Title: Towards a supersymmetric description of the Fermi Galactic center excess

Abstract

We attempt to build a model that describes the Fermi galactic gamma-ray excess (FGCE) within a UV-complete Supersymmetric framework; we find this to be highly non-trivial. At the very least a successful Supersymmetric explanation must have several important ingredients in order to fit the data and satisfy other theoretical and experimental constraints. Under the assumption that a single annihilation mediator is responsible for both the observed relic density as well as the FGCE, we show that the requirements are not easily satisfied in many TeV-scale SUSY models, but can be met with some model building effort in the general NMSSM with ~ 10 parameters beyond the MSSM. We find that the data selects a particular region of the parameter space with a mostly singlino lightest Supersymmetric particle and a relatively light CP-odd Higgs boson that acts as the mediator for dark matter annihilation. We study the predictions for various observables within this parameter space, and find that searches for this light CP-odd state at the LHC, as well as searches for the direct detection of dark matter, are likely to be quite challenging. It is possible that a signature could be observed in the flavor sector; however, indirect detection remainsmore » the best probe of this scenario.« less

Authors:
 [1];  [2];  [1];  [1]
  1. SLAC National Accelerator Laboratory, Menlo Park, CA (United States)
  2. Univ. of Florida, Gainesville, FL (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1213910
Grant/Contract Number:
AC03-76SF00515
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2015; Journal Issue: 2; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Supersymmetry Phenomenology

Citation Formats

Cahill-Rowley, M., Gainer, J. S., Hewett, J. L., and Rizzo, T. G.. Towards a supersymmetric description of the Fermi Galactic center excess. United States: N. p., 2015. Web. doi:10.1007/JHEP02(2015)057.
Cahill-Rowley, M., Gainer, J. S., Hewett, J. L., & Rizzo, T. G.. Towards a supersymmetric description of the Fermi Galactic center excess. United States. doi:10.1007/JHEP02(2015)057.
Cahill-Rowley, M., Gainer, J. S., Hewett, J. L., and Rizzo, T. G.. Tue . "Towards a supersymmetric description of the Fermi Galactic center excess". United States. doi:10.1007/JHEP02(2015)057. https://www.osti.gov/servlets/purl/1213910.
@article{osti_1213910,
title = {Towards a supersymmetric description of the Fermi Galactic center excess},
author = {Cahill-Rowley, M. and Gainer, J. S. and Hewett, J. L. and Rizzo, T. G.},
abstractNote = {We attempt to build a model that describes the Fermi galactic gamma-ray excess (FGCE) within a UV-complete Supersymmetric framework; we find this to be highly non-trivial. At the very least a successful Supersymmetric explanation must have several important ingredients in order to fit the data and satisfy other theoretical and experimental constraints. Under the assumption that a single annihilation mediator is responsible for both the observed relic density as well as the FGCE, we show that the requirements are not easily satisfied in many TeV-scale SUSY models, but can be met with some model building effort in the general NMSSM with ~ 10 parameters beyond the MSSM. We find that the data selects a particular region of the parameter space with a mostly singlino lightest Supersymmetric particle and a relatively light CP-odd Higgs boson that acts as the mediator for dark matter annihilation. We study the predictions for various observables within this parameter space, and find that searches for this light CP-odd state at the LHC, as well as searches for the direct detection of dark matter, are likely to be quite challenging. It is possible that a signature could be observed in the flavor sector; however, indirect detection remains the best probe of this scenario.},
doi = {10.1007/JHEP02(2015)057},
journal = {Journal of High Energy Physics (Online)},
number = 2,
volume = 2015,
place = {United States},
year = {Tue Feb 10 00:00:00 EST 2015},
month = {Tue Feb 10 00:00:00 EST 2015}
}

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Cited by: 36 works
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