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Spin Discrimination in Three-Body Decays

The identification of the correct model for physics beyond the Standard Model requires the determination of the spin of new particles. We investigate to which extent the spin of a new particle $X$ can be identified in scenarios where it decays dominantly in three-body decays $X\to f\bar{f} Y$. Here...

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Detalles Bibliográficos
Autores principales: Edelhäuser, Lisa, Porod, Werner, Singh, Ritesh K
Formato: info:eu-repo/semantics/article
Lenguaje:eng
Publicado: JHEP 2010
Materias:
Acceso en línea:https://dx.doi.org/10.1007/JHEP08(2010)053
http://cds.cern.ch/record/1267065
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author Edelhäuser, Lisa
Porod, Werner
Singh, Ritesh K
author_facet Edelhäuser, Lisa
Porod, Werner
Singh, Ritesh K
author_sort Edelhäuser, Lisa
collection CERN
description The identification of the correct model for physics beyond the Standard Model requires the determination of the spin of new particles. We investigate to which extent the spin of a new particle $X$ can be identified in scenarios where it decays dominantly in three-body decays $X\to f\bar{f} Y$. Here we assume that $Y$ is a candidate for dark matter and escapes direct detection at a high energy collider such as the LHC. We show that in the case that all intermediate particles are heavy, one can get information on the spins of $X$ and $Y$ at the LHC by exploiting the invariant mass distribution of the two standard model fermions. We develop a model-independent strategy to determine the spins without prior knowledge of the unknown couplings and test it in a series of Monte Carlo studies.
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spelling cern-12670652019-09-30T06:29:59Z doi:10.1007/JHEP08(2010)053 http://cds.cern.ch/record/1267065 eng Edelhäuser, Lisa Porod, Werner Singh, Ritesh K Spin Discrimination in Three-Body Decays Particle Physics - Phenomenology The identification of the correct model for physics beyond the Standard Model requires the determination of the spin of new particles. We investigate to which extent the spin of a new particle $X$ can be identified in scenarios where it decays dominantly in three-body decays $X\to f\bar{f} Y$. Here we assume that $Y$ is a candidate for dark matter and escapes direct detection at a high energy collider such as the LHC. We show that in the case that all intermediate particles are heavy, one can get information on the spins of $X$ and $Y$ at the LHC by exploiting the invariant mass distribution of the two standard model fermions. We develop a model-independent strategy to determine the spins without prior knowledge of the unknown couplings and test it in a series of Monte Carlo studies. info:eu-repo/grantAgreement/EC/FP7/237920 info:eu-repo/semantics/openAccess Education Level info:eu-repo/semantics/article http://cds.cern.ch/record/1267065 JHEP JHEP, (2010) pp. 053 2010-05-21
spellingShingle Particle Physics - Phenomenology
Edelhäuser, Lisa
Porod, Werner
Singh, Ritesh K
Spin Discrimination in Three-Body Decays
title Spin Discrimination in Three-Body Decays
title_full Spin Discrimination in Three-Body Decays
title_fullStr Spin Discrimination in Three-Body Decays
title_full_unstemmed Spin Discrimination in Three-Body Decays
title_short Spin Discrimination in Three-Body Decays
title_sort spin discrimination in three-body decays
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1007/JHEP08(2010)053
http://cds.cern.ch/record/1267065
http://cds.cern.ch/record/1267065
work_keys_str_mv AT edelhauserlisa spindiscriminationinthreebodydecays
AT porodwerner spindiscriminationinthreebodydecays
AT singhriteshk spindiscriminationinthreebodydecays