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NMSSM Interpretation of the Galactic Center Excess

Cheung, Clifford and Papucci, Michele and Sanford, David and Shah, Nausheen R. and Zurek, Kathryn M. (2014) NMSSM Interpretation of the Galactic Center Excess. Physical Review D, 90 (7). Art. No. 075011. ISSN 1550-7998. doi:10.1103/PhysRevD.90.075011.

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We explore models for the GeV Galactic Center Excess (GCE) observed by the Fermi Telescope, focusing on χχ→ƒƒ(bar) annihilation processes in the Z3 NMSSM. We begin by examining the requirements for a simplified model (parametrized by the couplings and masses of dark matter (DM) and mediator particles) to reproduce the GCE via χχ→ƒƒ^bar, while simultaneously thermally producing the observed relic abundance. We apply the results of our simplified model to the Z_3 NMSSM for Singlino/Higgsino~(S/H) or Bino/Higgsino~(B/H) DM. In the case of S/H DM, we find that the DM must be be very close to a pseudoscalar resonance to be viable, and large tan β and positive values of μ are preferred for evading direct detection constraints while simultaneously obtaining the observed Higgs mass. In the case of B/H DM, by contrast, the situation is much less tuned: annihilation generally occurs off-resonance, and for large tan β direct detection constraints are easily satisfied by choosing μ sufficiently large and negative. The B/H model generally has a light, largely MSSM-like pseudoscalar with no accompanying charged Higgs, which could be searched for at the LHC.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Papucci, Michele0000-0003-0810-0017
Zurek, Kathryn M.0000-0002-2629-337X
Additional Information:© 2014 American Physical Society. Received 4 August 2014; published 15 October 2014. We thank Tracy Slatyer for collaboration in the early stages of this work. NRS also thanks C. Wagner and T. Liu for useful discussion. This work was supported in part by the National Science Foundation under Grant No. PHYS-1066293 and the hospitality of the Aspen Center for Physics. Work at KITP is supported by the National Science Foundation under Grant No. NSF PHY11-25915. NRS is supported by the DOE grant No. DE-SC0007859 and by the Michigan Center for Theoretical Physics. KZ is supported by the DOE and by NSF CAREER award PHY 1049896. DS is supported in part by U.S. Department of Energy grant DEFG0292ER40701 and by the Gordon and Betty Moore Foundation through Grant No. 776 to the Caltech Moore Center for Theoretical Cosmology and Physics. CC is supported by a DOE Early Career Award DE-SC0010255.
Group:Caltech Theory, Walter Burke Institute for Theoretical Physics, Moore Center for Theoretical Cosmology and Physics
Funding AgencyGrant Number
Department of Energy (DOE)DE-SC0007859
Michigan Center for Theoretical PhysicsUNSPECIFIED
Department of Energy (DOE)DE-FG02-92ER40701
Gordon and Betty Moore Foundation776
Department of Energy (DOE)DE-SC0010255
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Other Numbering System NameOther Numbering System ID
Issue or Number:7
Classification Code:PACS: 95.35.+d, 14.80.Ly
Record Number:CaltechAUTHORS:20140714-090925327
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Official Citation:NMSSM interpretation of the Galactic Center excess Clifford Cheung, Michele Papucci, David Sanford, Nausheen R. Shah, and Kathryn M. Zurek Phys. Rev. D 90, 075011 (2014) – Published 15 October 2014
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:47159
Deposited By: Ruth Sustaita
Deposited On:14 Jul 2014 18:57
Last Modified:10 Nov 2021 17:35

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