Dark matter protohalos in a nine parameter MSSM and implications for direct and indirect detection

We study how the kinetic decoupling of dark matter within a minimal supersymmetric extension of the standard model, by adopting nine independent parameters (MSSM-9), could improve our knowledge of the properties of the dark matter protohalos. We show that the most probable neutralino mass regions, w...

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Authors: Diamanti, Roberta, Cabrera Catalán, María Eugenia, Ando, Shin’ichiro
Format: article
Publication Date:2015
Country:España
Institution:Universidad Católica de Valencia San Vicente Mártir
Repository:RIUCV. Repositorio de la Universidad Católica de Valencia San Vicente Mártir
Language:English
OAI Identifier:oai:riucv.ucv.es:20.500.12466/5103
Online Access:http://hdl.handle.net/20.500.12466/5103
Access Level:Open access
Keyword:Dark matter
Dark matter protohalos
Mass
Density
Luminosity
21 Astronomía y Astrofísica
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spelling Dark matter protohalos in a nine parameter MSSM and implications for direct and indirect detectionDiamanti, RobertaCabrera Catalán, María EugeniaAndo, Shin’ichiroDark matterDark matter protohalosMassDensityLuminosity21 Astronomía y AstrofísicaWe study how the kinetic decoupling of dark matter within a minimal supersymmetric extension of the standard model, by adopting nine independent parameters (MSSM-9), could improve our knowledge of the properties of the dark matter protohalos. We show that the most probable neutralino mass regions, which satisfy the relic density and the Higgs mass constraints, are those with the lightest supersymmetric neutralino mass around 1 TeV and 3 TeV, corresponding to Higgsino-like and winolike neutralino, respectively. The kinetic decoupling temperature in the MSSM-9 scenario leads to a most probable protohalo mass in a range of Mph ∼ 10−12–10−7M⊙. The part of the region closer to ∼2 TeV gives also important contributions from the neutralino-stau coannihilation, reducing the effective annihilation rate in the early Universe. We also study how the size of the smallest dark matter substructures correlates to experimental signatures, such as the spin-dependent and spin-independent scattering cross sections, relevant for direct detection of dark matter. Improvements on the spin-independent sensitivity might reduce the most probable range of the protohalo mass between ∼10−9M⊙ and ∼10−7M⊙, while the expected spin-dependent sensitivity provides weaker constraints. We show how the boost of the luminosity due to dark matter annihilation increases, depending on the protohalo mass. In the Higgsino case, the protohalo mass is lower than the canonical value often used in the literature (∼10−6M⊙), while hσvi does not deviate from hσvi ∼ 10−26 cm3 s−1; there is no significant enhancement of the luminosity. On the contrary, in the wino case, the protohalo mass is even lighter, and hσvi is two orders of magnitude larger; as its consequence, we see a substantial enhancement of the luminosity.20252025-01-1320152015-09-2820152015-09-28journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/20.500.12466/5103reponame:RIUCV. Repositorio de la Universidad Católica de Valencia San Vicente Mártirinstname:Universidad Católica de Valencia San Vicente MártirInglésengopen accesshttp://purl.org/coar/access_right/c_abf2Atribución 4.0 Internacionalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:riucv.ucv.es:20.500.12466/51032026-06-19T08:32:07Z
dc.title.none.fl_str_mv Dark matter protohalos in a nine parameter MSSM and implications for direct and indirect detection
title Dark matter protohalos in a nine parameter MSSM and implications for direct and indirect detection
spellingShingle Dark matter protohalos in a nine parameter MSSM and implications for direct and indirect detection
Diamanti, Roberta
Dark matter
Dark matter protohalos
Mass
Density
Luminosity
21 Astronomía y Astrofísica
title_short Dark matter protohalos in a nine parameter MSSM and implications for direct and indirect detection
title_full Dark matter protohalos in a nine parameter MSSM and implications for direct and indirect detection
title_fullStr Dark matter protohalos in a nine parameter MSSM and implications for direct and indirect detection
title_full_unstemmed Dark matter protohalos in a nine parameter MSSM and implications for direct and indirect detection
title_sort Dark matter protohalos in a nine parameter MSSM and implications for direct and indirect detection
dc.creator.none.fl_str_mv Diamanti, Roberta
Cabrera Catalán, María Eugenia
Ando, Shin’ichiro
author Diamanti, Roberta
author_facet Diamanti, Roberta
Cabrera Catalán, María Eugenia
Ando, Shin’ichiro
author_role author
author2 Cabrera Catalán, María Eugenia
Ando, Shin’ichiro
author2_role author
author
dc.contributor.none.fl_str_mv
dc.subject.none.fl_str_mv Dark matter
Dark matter protohalos
Mass
Density
Luminosity
21 Astronomía y Astrofísica
topic Dark matter
Dark matter protohalos
Mass
Density
Luminosity
21 Astronomía y Astrofísica
description We study how the kinetic decoupling of dark matter within a minimal supersymmetric extension of the standard model, by adopting nine independent parameters (MSSM-9), could improve our knowledge of the properties of the dark matter protohalos. We show that the most probable neutralino mass regions, which satisfy the relic density and the Higgs mass constraints, are those with the lightest supersymmetric neutralino mass around 1 TeV and 3 TeV, corresponding to Higgsino-like and winolike neutralino, respectively. The kinetic decoupling temperature in the MSSM-9 scenario leads to a most probable protohalo mass in a range of Mph ∼ 10−12–10−7M⊙. The part of the region closer to ∼2 TeV gives also important contributions from the neutralino-stau coannihilation, reducing the effective annihilation rate in the early Universe. We also study how the size of the smallest dark matter substructures correlates to experimental signatures, such as the spin-dependent and spin-independent scattering cross sections, relevant for direct detection of dark matter. Improvements on the spin-independent sensitivity might reduce the most probable range of the protohalo mass between ∼10−9M⊙ and ∼10−7M⊙, while the expected spin-dependent sensitivity provides weaker constraints. We show how the boost of the luminosity due to dark matter annihilation increases, depending on the protohalo mass. In the Higgsino case, the protohalo mass is lower than the canonical value often used in the literature (∼10−6M⊙), while hσvi does not deviate from hσvi ∼ 10−26 cm3 s−1; there is no significant enhancement of the luminosity. On the contrary, in the wino case, the protohalo mass is even lighter, and hσvi is two orders of magnitude larger; as its consequence, we see a substantial enhancement of the luminosity.
publishDate 2015
dc.date.none.fl_str_mv 2015
2015-09-28
2015
2015-09-28
2025
2025-01-13
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/20.500.12466/5103
url http://hdl.handle.net/20.500.12466/5103
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución 4.0 Internacional
http://creativecommons.org/licenses/by/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución 4.0 Internacional
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:RIUCV. Repositorio de la Universidad Católica de Valencia San Vicente Mártir
instname:Universidad Católica de Valencia San Vicente Mártir
instname_str Universidad Católica de Valencia San Vicente Mártir
reponame_str RIUCV. Repositorio de la Universidad Católica de Valencia San Vicente Mártir
collection RIUCV. Repositorio de la Universidad Católica de Valencia San Vicente Mártir
repository.name.fl_str_mv
repository.mail.fl_str_mv
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