Cargando…

The Extent of the Stop Coannihilation Strip

Many supersymmetric models such as the CMSSM feature a strip in parameter space where the lightest neutralino \chi is identified as the lightest supersymmetric particle (LSP), the lighter stop squark \tilde t_1 is the next-to-lightest supersymmetric particle (NLSP), and the relic \chi cold dark matt...

Descripción completa

Detalles Bibliográficos
Autores principales: Ellis, John, Olive, Keith A., Zheng, Jiaming
Lenguaje:eng
Publicado: 2014
Materias:
Acceso en línea:https://dx.doi.org/10.1140/epjc/s10052-014-2947-7
http://cds.cern.ch/record/1699028
_version_ 1780936218481000448
author Ellis, John
Olive, Keith A.
Zheng, Jiaming
author_facet Ellis, John
Olive, Keith A.
Zheng, Jiaming
author_sort Ellis, John
collection CERN
description Many supersymmetric models such as the CMSSM feature a strip in parameter space where the lightest neutralino \chi is identified as the lightest supersymmetric particle (LSP), the lighter stop squark \tilde t_1 is the next-to-lightest supersymmetric particle (NLSP), and the relic \chi cold dark matter density is brought into the range allowed by astrophysics and cosmology by coannihilation with the lighter stop squark \tilde t_1 NLSP. We calculate the stop coannihilation strip in the CMSSM, incorporating Sommerfeld enhancement effects, and explore the relevant phenomenological constraints and phenomenological signatures. In particular, we show that the \tilde t_1 may weigh several TeV, and its lifetime may be in the nanosecond range, features that are more general than the specific CMSSM scenarios that we study in this paper.
id cern-1699028
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2014
record_format invenio
spelling cern-16990282022-08-10T20:09:00Zdoi:10.1140/epjc/s10052-014-2947-7http://cds.cern.ch/record/1699028engEllis, JohnOlive, Keith A.Zheng, JiamingThe Extent of the Stop Coannihilation StripParticle Physics - PhenomenologyMany supersymmetric models such as the CMSSM feature a strip in parameter space where the lightest neutralino \chi is identified as the lightest supersymmetric particle (LSP), the lighter stop squark \tilde t_1 is the next-to-lightest supersymmetric particle (NLSP), and the relic \chi cold dark matter density is brought into the range allowed by astrophysics and cosmology by coannihilation with the lighter stop squark \tilde t_1 NLSP. We calculate the stop coannihilation strip in the CMSSM, incorporating Sommerfeld enhancement effects, and explore the relevant phenomenological constraints and phenomenological signatures. In particular, we show that the \tilde t_1 may weigh several TeV, and its lifetime may be in the nanosecond range, features that are more general than the specific CMSSM scenarios that we study in this paper.Many supersymmetric models such as the constrained minimal supersymmetric extension of the Standard Model (CMSSM) feature a strip in parameter space where the lightest neutralino $\chi $ is identified as the lightest supersymmetric particle, the lighter stop squark ${\tilde{t}_1}$ is the next-to-lightest supersymmetric particle (NLSP), and the relic $\chi $ cold dark matter density is brought into the range allowed by astrophysics and cosmology by coannihilation with the lighter stop squark ${\tilde{t}_1}$ NLSP. We calculate the stop coannihilation strip in the CMSSM, incorporating Sommerfeld enhancement effects, and we explore the relevant phenomenological constraints and phenomenological signatures. In particular, we show that the ${\tilde{t}_1}$ may weigh several TeV, and its lifetime may be in the nanosecond range, features that are more general than the specific CMSSM scenarios that we study in this paper.Many supersymmetric models such as the CMSSM feature a strip in parameter space where the lightest neutralino \chi is identified as the lightest supersymmetric particle (LSP), the lighter stop squark \tilde t_1 is the next-to-lightest supersymmetric particle (NLSP), and the relic \chi cold dark matter density is brought into the range allowed by astrophysics and cosmology by coannihilation with the lighter stop squark \tilde t_1 NLSP. We calculate the stop coannihilation strip in the CMSSM, incorporating Sommerfeld enhancement effects, and explore the relevant phenomenological constraints and phenomenological signatures. In particular, we show that the \tilde t_1 may weigh several TeV, and its lifetime may be in the nanosecond range, features that are more general than the specific CMSSM scenarios that we study in this paper.arXiv:1404.5571KCL-PH-TH-2014-17LCTS-2014-16CERN-PH-TH-2014-067FTPI-MINN-14-11UMN-TH-3333-14KCL-PH-TH-2014-17LCTS-2014-16CERN-PH-TH-2014-067UMN-TH-3333-14FTPI-MINN-14-11oai:cds.cern.ch:16990282014-04-22
spellingShingle Particle Physics - Phenomenology
Ellis, John
Olive, Keith A.
Zheng, Jiaming
The Extent of the Stop Coannihilation Strip
title The Extent of the Stop Coannihilation Strip
title_full The Extent of the Stop Coannihilation Strip
title_fullStr The Extent of the Stop Coannihilation Strip
title_full_unstemmed The Extent of the Stop Coannihilation Strip
title_short The Extent of the Stop Coannihilation Strip
title_sort extent of the stop coannihilation strip
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1140/epjc/s10052-014-2947-7
http://cds.cern.ch/record/1699028
work_keys_str_mv AT ellisjohn theextentofthestopcoannihilationstrip
AT olivekeitha theextentofthestopcoannihilationstrip
AT zhengjiaming theextentofthestopcoannihilationstrip
AT ellisjohn extentofthestopcoannihilationstrip
AT olivekeitha extentofthestopcoannihilationstrip
AT zhengjiaming extentofthestopcoannihilationstrip