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Title: Return of the WIMP: Missing energy signals and the Galactic Center excess

Abstract

In a recent work, we emphasized that an excess in tri-lepton events plus missing energy observed by the ATLAS experiment at the LHC could be interpreted as a signal of low energy supersymmetry. In such a scenario the lightest neutralino mass is approximately $$m_\chi \simeq 60$$ GeV and the direct Dark Matter detection cross section is naturally below the current bound. In this work we present simple extensions of this scenario that lead to an explanation of the gamma ray excess at the center of the galaxy observed by Fermi-LAT, as well as the anti-proton excess observed by AMS-02. These extensions include the addition of a small CP violating phase in the neutralino sector or the addition of a light CP-odd Higgs scalar. Our study is of special relevance in view of a recent analysis that casts doubt on the previously accepted preference for mili-second pulsars as the origin of the galactic center excess.

Authors:
 [1];  [2]; ORCiD logo [2];  [3]
  1. Fermilab
  2. Wayne State U.
  3. Chicago U., KICP
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1560292
Alternate Identifier(s):
OSTI ID: 1545085
Report Number(s):
arXiv:1905.03768; FERMILAB-PUB-19-199-T; EFI-19-8; WSU-HEP-1904
1733999
Grant/Contract Number:  
AC02-07CH11359; AC02-06CH11357; DESC0007983; FG02-13ER41958
Resource Type:
Published Article
Journal Name:
Phys.Rev.
Additional Journal Information:
Journal Volume: D100; Journal Issue: 5
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Carena, Marcela, Osborne, James, Shah, Nausheen R., and Wagner, Carlos E.M. Return of the WIMP: Missing energy signals and the Galactic Center excess. United States: N. p., 2019. Web. doi:10.1103/PhysRevD.100.055002.
Carena, Marcela, Osborne, James, Shah, Nausheen R., & Wagner, Carlos E.M. Return of the WIMP: Missing energy signals and the Galactic Center excess. United States. doi:10.1103/PhysRevD.100.055002.
Carena, Marcela, Osborne, James, Shah, Nausheen R., and Wagner, Carlos E.M. Wed . "Return of the WIMP: Missing energy signals and the Galactic Center excess". United States. doi:10.1103/PhysRevD.100.055002.
@article{osti_1560292,
title = {Return of the WIMP: Missing energy signals and the Galactic Center excess},
author = {Carena, Marcela and Osborne, James and Shah, Nausheen R. and Wagner, Carlos E.M.},
abstractNote = {In a recent work, we emphasized that an excess in tri-lepton events plus missing energy observed by the ATLAS experiment at the LHC could be interpreted as a signal of low energy supersymmetry. In such a scenario the lightest neutralino mass is approximately $m_\chi \simeq 60$ GeV and the direct Dark Matter detection cross section is naturally below the current bound. In this work we present simple extensions of this scenario that lead to an explanation of the gamma ray excess at the center of the galaxy observed by Fermi-LAT, as well as the anti-proton excess observed by AMS-02. These extensions include the addition of a small CP violating phase in the neutralino sector or the addition of a light CP-odd Higgs scalar. Our study is of special relevance in view of a recent analysis that casts doubt on the previously accepted preference for mili-second pulsars as the origin of the galactic center excess.},
doi = {10.1103/PhysRevD.100.055002},
journal = {Phys.Rev.},
number = 5,
volume = D100,
place = {United States},
year = {2019},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevD.100.055002

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