Initial State Radiation in Majorana Dark Matter Annihilations

The cross section for a Majorana Dark Matter particle annihilating into light fermions is helicity suppressed. We show that, if the Dark Matter is the neutral Majorana component of a multiplet which is charged under the electroweak interactions of the Standard Model, the emission of gauge bosons fro...

Descripción completa

Detalles Bibliográficos
Autores principales: Ciafaloni, Paolo, Cirelli, Marco, Comelli, Denis, De Simone, Andrea, Riotto, Antonio, Urbano, Alfredo
Lenguaje:eng
Publicado: 2011
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1088/1475-7516/2011/10/034
http://cds.cern.ch/record/1370313
_version_ 1780922856897511424
author Ciafaloni, Paolo
Cirelli, Marco
Comelli, Denis
De Simone, Andrea
Riotto, Antonio
Urbano, Alfredo
author_facet Ciafaloni, Paolo
Cirelli, Marco
Comelli, Denis
De Simone, Andrea
Riotto, Antonio
Urbano, Alfredo
author_sort Ciafaloni, Paolo
collection CERN
description The cross section for a Majorana Dark Matter particle annihilating into light fermions is helicity suppressed. We show that, if the Dark Matter is the neutral Majorana component of a multiplet which is charged under the electroweak interactions of the Standard Model, the emission of gauge bosons from the initial state lifts the suppression and allows an s-wave annihilation. The resulting energy spectra of stable Standard Model particles are importantly affected. This has an impact on indirect searches for Dark Matter.
id cern-1370313
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2011
record_format invenio
spelling cern-13703132023-03-14T19:02:59Zdoi:10.1088/1475-7516/2011/10/034http://cds.cern.ch/record/1370313engCiafaloni, PaoloCirelli, MarcoComelli, DenisDe Simone, AndreaRiotto, AntonioUrbano, AlfredoInitial State Radiation in Majorana Dark Matter AnnihilationsParticle Physics - PhenomenologyThe cross section for a Majorana Dark Matter particle annihilating into light fermions is helicity suppressed. We show that, if the Dark Matter is the neutral Majorana component of a multiplet which is charged under the electroweak interactions of the Standard Model, the emission of gauge bosons from the initial state lifts the suppression and allows an s-wave annihilation. The resulting energy spectra of stable Standard Model particles are importantly affected. This has an impact on indirect searches for Dark Matter.The cross section for a Majorana Dark Matter particle annihilating into light fermions is helicity suppressed. We show that, if the Dark Matter is the neutral Majorana component of a multiplet which is charged under the electroweak interactions of the Standard Model, the emission of gauge bosons from the initial state lifts the suppression and allows an s-wave annihilation. The resulting energy spectra of stable Standard Model particles are importantly affected. This has an impact on indirect searches for Dark Matter.arXiv:1107.4453CERN-PH-TH-2011-178SACLAY-T11-167CERN-PH-TH-2011-178SACLAY-T11-167oai:cds.cern.ch:13703132011-07-25
spellingShingle Particle Physics - Phenomenology
Ciafaloni, Paolo
Cirelli, Marco
Comelli, Denis
De Simone, Andrea
Riotto, Antonio
Urbano, Alfredo
Initial State Radiation in Majorana Dark Matter Annihilations
title Initial State Radiation in Majorana Dark Matter Annihilations
title_full Initial State Radiation in Majorana Dark Matter Annihilations
title_fullStr Initial State Radiation in Majorana Dark Matter Annihilations
title_full_unstemmed Initial State Radiation in Majorana Dark Matter Annihilations
title_short Initial State Radiation in Majorana Dark Matter Annihilations
title_sort initial state radiation in majorana dark matter annihilations
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1088/1475-7516/2011/10/034
http://cds.cern.ch/record/1370313
work_keys_str_mv AT ciafalonipaolo initialstateradiationinmajoranadarkmatterannihilations
AT cirellimarco initialstateradiationinmajoranadarkmatterannihilations
AT comellidenis initialstateradiationinmajoranadarkmatterannihilations
AT desimoneandrea initialstateradiationinmajoranadarkmatterannihilations
AT riottoantonio initialstateradiationinmajoranadarkmatterannihilations
AT urbanoalfredo initialstateradiationinmajoranadarkmatterannihilations

Ejemplares similares