Anomalous X-ray galactic signal from 7.1 keV spin-3/2 dark matter decay

Journal Article · Mon Feb 01 00:00:00 EST 2016 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2016/02/016· OSTI ID:22525018

Dutta, Sukanta ^[1]; Goyal, Ashok; Kumar, Sanjeev ^[2]

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1. Department of Physics, SGTB Khalsa College, University of Delhi, New Delhi (India)
2. Department of Physics and Astrophysics, University of Delhi, New Delhi, 110007 India (India)

In order to explain the recently reported peak at 3.55 keV in the galactic X-ray spectrum, we propose a simple model. In this model, the Standard Model is extended by including a neutral spin-3/2 vector-like fermion that transforms like a singlet under SM gauge group. This 7.1 keV spin-3/2 fermion is considered to comprise a portion of the observed dark matter. Its decay into a neutrino and a photon with decay life commensurate with the observed data, fits the relic dark matter density and obeys the astrophysical constraints from the supernova cooling.

• OSTI ID: 22525018
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2016, Issue 02; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ASTROPHYSICS
COSMIC NEUTRINOS
COSMIC PHOTONS
COSMIC X-RAY SOURCES
DENSITY
GALAXIES
KEV RANGE
LIMITING VALUES
NONLUMINOUS MATTER
PARTICLE DECAY
SPIN
STANDARD MODEL
SUPERNOVAE
VECTORS
X RADIATION
X-RAY SPECTRA