Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Galactic Gamma Ray Excess and Dark Matter Phenomenology in a
  $U(1)_{B-L}$ Model   In this work, we have considered a gauged $U(1)_{\rm B-L}$ extension of the
Standard Model (SM) with three right handed neutrinos for anomaly cancellation
and two additional SM singlet complex scalars with non-trivial B-L charges. One
of these is used to spontaneously break the $U(1)_{\rm B-L}$ 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)
$\gamma$-ray excess seen by Fermi-LAT. We show that for DM masses in the range
40-55 GeV and for a wide range of $U(1)_{\rm B-L}$ 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.

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The categories of this paper are: gr-qc
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The categories of this paper are: physics
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The categories of this paper are: math-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ex
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The categories of this paper are: chao-dyn
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The categories of this paper are: eess
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The categories of this paper are: nlin
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The categories of this paper are: nucl-th
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The categories of this paper are: alg-geom
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The categories of this paper are: adap-org
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The categories of this paper are: ao-sci
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The categories of this paper are: plasm-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: cmp-lg
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The categories of this paper are: mtrl-th