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Galactic gamma ray excess and dark matter phenomenology in a U(1)B−L model
KTH, School of Engineering Sciences (SCI), Theoretical Physics.ORCID iD: 0000-0002-6071-8546
2016 (English)In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, Vol. 2016, no 8, 114Article in journal (Refereed) Published
Abstract [en]

In this work, we have considered a gauged U(1)B−L extension of the Standard Model (SM) with three right handed neutrinos for anomaly cancellation and two additional SM singlet complex scalars with nontrivial B-L charges. One of these is used to spontaneously break the U(1)B−L gauge symmetry, leading to Majorana masses for the neutrinos through the standard Type I seesaw mechanism, while the other becomes the dark matter (DM) candidate in the model. We test the viability of the model to simultaneously explain the DM relic density observed in the CMB data as well as the Galactic Centre (GC) γ-ray excess seen by Fermi-LAT. We show that for DM masses in the range 40-55 GeV and for a wide range of U(1)B−L gauge boson masses, one can satisfy both these constraints if the additional neutral Higgs scalar has a mass around the resonance region. In studying the dark matter phenomenology and GC excess, we have taken into account theoretical as well as experimental constraints coming from vacuum stability condition, Planck bound on DM relic density, LHC and LUX and present allowed areas in the model parameter space consistent with all relevant data, calculate the predicted gamma ray flux from the GC and discuss the related phenomenology.

Place, publisher, year, edition, pages
Springer, 2016. Vol. 2016, no 8, 114
Keyword [en]
Beyond Standard Model, Cosmology of Theories beyond the SM
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:kth:diva-194994DOI: 10.1007/JHEP08(2016)114ISI: 000391752300001ScopusID: 2-s2.0-84983661439OAI: oai:DiVA.org:kth-194994DiVA: diva2:1044219
Note

QC 20161102

Available from: 2016-11-02 Created: 2016-11-01 Last updated: 2017-02-13Bibliographically approved

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CiteExportLink to record
Permanent link

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Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
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More languages
Output format
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