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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Detalles Bibliográficos
Autores principales: Colucci, Stefano, Dreiner, Herbi K., Staub, Florian, Ubaldi, Lorenzo
Lenguaje:eng
Publicado: 2015
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/j.physletb.2015.09.009
http://cds.cern.ch/record/2036914
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author Colucci, Stefano
Dreiner, Herbi K.
Staub, Florian
Ubaldi, Lorenzo
author_facet Colucci, Stefano
Dreiner, Herbi K.
Staub, Florian
Ubaldi, Lorenzo
author_sort Colucci, Stefano
collection CERN
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.
id cern-2036914
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2015
record_format invenio
spelling cern-20369142023-03-14T17:45:13Zdoi:10.1016/j.physletb.2015.09.009http://cds.cern.ch/record/2036914engColucci, StefanoDreiner, Herbi K.Staub, FlorianUbaldi, LorenzoHeavy concerns about the light axino explanation of the 3.5 keV X-ray lineParticle Physics - PhenomenologyAn 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.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 .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 $10^4$ s.arXiv:1507.06200CERN-PH-TH-2015-163CERN-PH-TH-2015-163BONN-TH-2015-10oai:cds.cern.ch:20369142015-07-22
spellingShingle Particle Physics - Phenomenology
Colucci, Stefano
Dreiner, Herbi K.
Staub, Florian
Ubaldi, Lorenzo
Heavy concerns about the light axino explanation of the 3.5 keV X-ray line
title 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_short 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
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/j.physletb.2015.09.009
http://cds.cern.ch/record/2036914
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AT staubflorian heavyconcernsaboutthelightaxinoexplanationofthe35kevxrayline
AT ubaldilorenzo heavyconcernsaboutthelightaxinoexplanationofthe35kevxrayline

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