Sneaky light stop

A light supersymmetric top quark partner (stop) with a mass nearly degenerate with that of the Standard Model (SM) top quark can evade direct searches. The precise measurement of SM top properties such as the cross-section has been suggested to give a handle for this `stealth stop' scenario. We...

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Detalles Bibliográficos
Autores principales: Eifert, Till, Nachman, Benjamin
Lenguaje:eng
Publicado: 2014
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/j.physletb.2015.02.039
http://cds.cern.ch/record/1958053
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author Eifert, Till
Nachman, Benjamin
author_facet Eifert, Till
Nachman, Benjamin
author_sort Eifert, Till
collection CERN
description A light supersymmetric top quark partner (stop) with a mass nearly degenerate with that of the Standard Model (SM) top quark can evade direct searches. The precise measurement of SM top properties such as the cross-section has been suggested to give a handle for this `stealth stop' scenario. We present an estimate of the potential impact a light stop may have on top quark mass measurements. The results indicate that certain light stop models may induce a bias of up to a few GeV, and that this effect can hide the shift in, and hence sensitivity from, cross-section measurements. The studies make some simplifying assumptions for the top quark measurement technique, and are based on truth-level samples.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2014
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spelling cern-19580532022-08-10T12:52:19Zdoi:10.1016/j.physletb.2015.02.039http://cds.cern.ch/record/1958053engEifert, TillNachman, BenjaminSneaky light stopParticle Physics - PhenomenologyA light supersymmetric top quark partner (stop) with a mass nearly degenerate with that of the Standard Model (SM) top quark can evade direct searches. The precise measurement of SM top properties such as the cross-section has been suggested to give a handle for this `stealth stop' scenario. We present an estimate of the potential impact a light stop may have on top quark mass measurements. The results indicate that certain light stop models may induce a bias of up to a few GeV, and that this effect can hide the shift in, and hence sensitivity from, cross-section measurements. The studies make some simplifying assumptions for the top quark measurement technique, and are based on truth-level samples.A light supersymmetric top quark partner (stop) with a mass nearly degenerate with that of the Standard Model (SM) top quark can evade direct searches. The precise measurement of SM top properties such as the cross-section has been suggested to give a handle for this `stealth stop' scenario. We present an estimate of the potential impact a light stop may have on top quark mass measurements. The results indicate that certain light stop models may induce a bias of up to a few GeV, and that this effect can hide the shift in, and hence sensitivity from, cross-section measurements. The studies make some simplifying assumptions for the top quark measurement technique, and are based on truth-level samples.A light supersymmetric top quark partner (stop) with a mass nearly degenerate with that of the standard model (SM) top quark can evade direct searches. The precise measurement of SM top properties such as the cross-section has been suggested to give a handle for this ‘stealth stop’ scenario. We present an estimate of the potential impact a light stop may have on top quark mass measurements. The results indicate that certain light stop models may induce a bias of up to a few GeV, and that this effect can hide the shift in, and hence sensitivity from, cross-section measurements. Due to the different initial states, the size of the bias is slightly different between the LHC and the Tevatron. The studies make some simplifying assumptions for the top quark measurement technique, and are based on truth-level samples.arXiv:1410.7025oai:cds.cern.ch:19580532014-10-26
spellingShingle Particle Physics - Phenomenology
Eifert, Till
Nachman, Benjamin
Sneaky light stop
title Sneaky light stop
title_full Sneaky light stop
title_fullStr Sneaky light stop
title_full_unstemmed Sneaky light stop
title_short Sneaky light stop
title_sort sneaky light stop
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/j.physletb.2015.02.039
http://cds.cern.ch/record/1958053
work_keys_str_mv AT eiferttill sneakylightstop
AT nachmanbenjamin sneakylightstop

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