Heavy concerns about the light axino explanation of the 3.5 keV X-ray line
An unidentified 3.5 keV line from X-ray observations of galaxy clusters has been reported recently. Although still under scrutiny, decaying dark matter could be responsible for this signal. We investigate whether an axino with a mass of 7 keV could explain the line, keeping the discussion as model i...
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doaj-2bf5f53eb1394df082b310eb6b84982b2020-11-24T21:57:24ZengElsevierPhysics Letters B0370-26931873-24452015-11-01750C10711110.1016/j.physletb.2015.09.009Heavy concerns about the light axino explanation of the 3.5 keV X-ray lineStefano Colucci0Herbi K. Dreiner1Florian Staub2Lorenzo Ubaldi3Physikalisches Institut der Universität Bonn, Bethe Center for Theoretical Physics, Nußallee 12, 53115 Bonn, GermanyPhysikalisches Institut der Universität Bonn, Bethe Center for Theoretical Physics, Nußallee 12, 53115 Bonn, GermanyTheory Division, CERN, 1211 Geneva 23, SwitzerlandRaymond and Beverly Sackler School of Physics and Astronomy, Tel-Aviv University, Tel-Aviv 69978, IsraelAn unidentified 3.5 keV line from X-ray observations of galaxy clusters has been reported recently. Although still under scrutiny, decaying dark matter could be responsible for this signal. We investigate whether an axino with a mass of 7 keV could explain the line, keeping the discussion as model independent as possible. We point out several obstacles, which were overlooked in the literature, and which make the axino an unlikely candidate. The only viable scenario predicts a light metastable neutralino, with a mass between 0.1 and 10 GeV and a lifetime between 10−3 and 104 s.http://www.sciencedirect.com/science/article/pii/S0370269315006772 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Stefano Colucci Herbi K. Dreiner Florian Staub Lorenzo Ubaldi |
spellingShingle |
Stefano Colucci Herbi K. Dreiner Florian Staub Lorenzo Ubaldi Heavy concerns about the light axino explanation of the 3.5 keV X-ray line Physics Letters B |
author_facet |
Stefano Colucci Herbi K. Dreiner Florian Staub Lorenzo Ubaldi |
author_sort |
Stefano Colucci |
title |
Heavy concerns about the light axino explanation of the 3.5 keV X-ray line |
title_short |
Heavy concerns about the light axino explanation of the 3.5 keV X-ray line |
title_full |
Heavy concerns about the light axino explanation of the 3.5 keV X-ray line |
title_fullStr |
Heavy concerns about the light axino explanation of the 3.5 keV X-ray line |
title_full_unstemmed |
Heavy concerns about the light axino explanation of the 3.5 keV X-ray line |
title_sort |
heavy concerns about the light axino explanation of the 3.5 kev x-ray line |
publisher |
Elsevier |
series |
Physics Letters B |
issn |
0370-2693 1873-2445 |
publishDate |
2015-11-01 |
description |
An unidentified 3.5 keV line from X-ray observations of galaxy clusters has been reported recently. Although still under scrutiny, decaying dark matter could be responsible for this signal. We investigate whether an axino with a mass of 7 keV could explain the line, keeping the discussion as model independent as possible. We point out several obstacles, which were overlooked in the literature, and which make the axino an unlikely candidate. The only viable scenario predicts a light metastable neutralino, with a mass between 0.1 and 10 GeV and a lifetime between 10−3 and 104 s. |
url |
http://www.sciencedirect.com/science/article/pii/S0370269315006772 |
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