Enhanced anti-deuteron Dark Matter signal and the implications of PAMELA

We show that the jet structure of DM annihilation or decay products enhances the anti-deuterium production rate by orders of magnitude compared to the previous computations done assuming a spherically symmetric coalescence model. In particular, in the limit of heavy DM, M >> m_p, we get a cons...

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Detalles Bibliográficos
Autores principales: Kadastik, Mario, Raidal, Martti, Strumia, Alessandro
Lenguaje:eng
Publicado: 2009
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/j.physletb.2009.12.005
http://cds.cern.ch/record/1199984
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author Kadastik, Mario
Raidal, Martti
Strumia, Alessandro
author_facet Kadastik, Mario
Raidal, Martti
Strumia, Alessandro
author_sort Kadastik, Mario
collection CERN
description We show that the jet structure of DM annihilation or decay products enhances the anti-deuterium production rate by orders of magnitude compared to the previous computations done assuming a spherically symmetric coalescence model. In particular, in the limit of heavy DM, M >> m_p, we get a constant rather than 1/M^2 suppressed anti-deuterium production rate. Therefore, a detectable anti-deuterium signal is compatible with the lack of an excess in the anti-proton PAMELA flux. Most importantly, cosmic anti-deuterium searches become sensitive to the annihilations or decays of heavy DM, suggesting to extend the experimental anti-deuterium searches above the O(1) GeV scale.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2009
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spelling cern-11999842023-03-15T19:11:42Zdoi:10.1016/j.physletb.2009.12.005http://cds.cern.ch/record/1199984engKadastik, MarioRaidal, MarttiStrumia, AlessandroEnhanced anti-deuteron Dark Matter signal and the implications of PAMELAParticle Physics - PhenomenologyWe show that the jet structure of DM annihilation or decay products enhances the anti-deuterium production rate by orders of magnitude compared to the previous computations done assuming a spherically symmetric coalescence model. In particular, in the limit of heavy DM, M >> m_p, we get a constant rather than 1/M^2 suppressed anti-deuterium production rate. Therefore, a detectable anti-deuterium signal is compatible with the lack of an excess in the anti-proton PAMELA flux. Most importantly, cosmic anti-deuterium searches become sensitive to the annihilations or decays of heavy DM, suggesting to extend the experimental anti-deuterium searches above the O(1) GeV scale.We show that the jet structure of DM annihilation or decay products enhances the d¯ production rate by orders of magnitude compared to the previous computations done assuming a spherically symmetric coalescence model. In particular, in the limit of heavy DM, M≫mp , we get a constant rather than 1/M2 suppressed d¯ production rate. Therefore, a detectable d¯ signal is compatible with the lack of an excess in the p¯ PAMELA flux. Most importantly, cosmic d¯ searches become sensitive to the annihilations or decays of heavy DM, suggesting to extend the experimental d¯ searches above the O(1) GeV scale.We show that the jet structure of DM annihilation or decay products enhances the anti-deuterium production rate by orders of magnitude compared to the previous computations done assuming a spherically symmetric coalescence model. In particular, in the limit of heavy DM, M >> m_p, we get a constant rather than 1/M^2 suppressed anti-deuterium production rate. Therefore, a detectable anti-deuterium signal is compatible with the lack of an excess in the anti-proton PAMELA flux. Most importantly, cosmic anti-deuterium searches become sensitive to the annihilations or decays of heavy DM, suggesting to extend the experimental anti-deuterium searches above the O(1) GeV scale.arXiv:0908.1578CERN-PH-TH-2009-149CERN-PH-TH-2009-149oai:cds.cern.ch:11999842009-08-13
spellingShingle Particle Physics - Phenomenology
Kadastik, Mario
Raidal, Martti
Strumia, Alessandro
Enhanced anti-deuteron Dark Matter signal and the implications of PAMELA
title Enhanced anti-deuteron Dark Matter signal and the implications of PAMELA
title_full Enhanced anti-deuteron Dark Matter signal and the implications of PAMELA
title_fullStr Enhanced anti-deuteron Dark Matter signal and the implications of PAMELA
title_full_unstemmed Enhanced anti-deuteron Dark Matter signal and the implications of PAMELA
title_short Enhanced anti-deuteron Dark Matter signal and the implications of PAMELA
title_sort enhanced anti-deuteron dark matter signal and the implications of pamela
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/j.physletb.2009.12.005
http://cds.cern.ch/record/1199984
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AT raidalmartti enhancedantideuterondarkmattersignalandtheimplicationsofpamela
AT strumiaalessandro enhancedantideuterondarkmattersignalandtheimplicationsofpamela

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