Journal
PHYSICS LETTERS B
Volume 718, Issue 4-5, Pages 1425-1429Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2012.12.041
Keywords
Fermi-LAT; Gamma-ray; Dark matter decay; Scalar dark matter; Dimension 6 operator
Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology [2010-0009021]
- Korea Institute for Advanced Study (KIAS)
- Korea government (MEST)
- National Research Foundation of Korea [2010-0009021, 2013-PG033002] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The 130 GeV gamma-ray line based on tentative analyses on the Fermi-LAT data is hard to be understood with dark matter annihilation in the conventional framework of the MSSM. We point out that it can be nicely explained with two body decay of a scalar dark matter ((phi) over tilde -> gamma gamma) by the dimension 6 operator suppressed with the mass of the grand unification scale (similar to 10(16) GeV), L superset of vertical bar(phi) over tilde (DM)vertical bar(2) F mu nu F mu nu/M-GUT(2), in which the scalar dark matter (phi) over tilde (DM) develops a TeV scale vacuum expectation value. We propose a viable model explaining the 130 GeV gamma-ray line. (C) 2012 Elsevier B.V. All rights reserved.
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