Single top polarisation as a window to new physics

We discuss the effect of heavy new physics, parameterised in terms of four-fermion operators, in the polarisation of single top (anti-)quarks in the $t$-channel process at the LHC. It is found that for operators involving a right-handed top quark field the relative effect on the longitudinal polaris...

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Detalles Bibliográficos
Autores principales: Aguilar-Saavedra, J.A., Degrande, C., Khatibi, S.
Lenguaje:eng
Publicado: 2017
Materias:
hep-ex
Particle Physics - Experiment
hep-ph
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/j.physletb.2017.04.023
http://cds.cern.ch/record/2259607
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author Aguilar-Saavedra, J.A.
Degrande, C.
Khatibi, S.
author_facet Aguilar-Saavedra, J.A.
Degrande, C.
Khatibi, S.
author_sort Aguilar-Saavedra, J.A.
collection CERN
description We discuss the effect of heavy new physics, parameterised in terms of four-fermion operators, in the polarisation of single top (anti-)quarks in the $t$-channel process at the LHC. It is found that for operators involving a right-handed top quark field the relative effect on the longitudinal polarisation is twice larger than the relative effect on the total cross section. This enhanced dependence on possible four-fermion contributions makes the polarisation measurements specially interesting, in particular at high momenta.
id cern-2259607
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2017
record_format invenio
spelling cern-22596072022-08-10T12:32:33Zdoi:10.1016/j.physletb.2017.04.023http://cds.cern.ch/record/2259607engAguilar-Saavedra, J.A.Degrande, C.Khatibi, S.Single top polarisation as a window to new physicshep-exParticle Physics - Experimenthep-phParticle Physics - PhenomenologyWe discuss the effect of heavy new physics, parameterised in terms of four-fermion operators, in the polarisation of single top (anti-)quarks in the $t$-channel process at the LHC. It is found that for operators involving a right-handed top quark field the relative effect on the longitudinal polarisation is twice larger than the relative effect on the total cross section. This enhanced dependence on possible four-fermion contributions makes the polarisation measurements specially interesting, in particular at high momenta.We discuss the effect of heavy new physics, parameterised in terms of four-fermion operators, in the polarisation of single top (anti-)quarks in the t -channel process at the LHC. It is found that for operators involving a right-handed top quark field the relative effect on the longitudinal polarisation is twice larger than the relative effect on the total cross section. This enhanced dependence on possible four-fermion contributions makes the polarisation measurements specially interesting, in particular at high momenta.CERN-TH-2017-013arXiv:1701.05900oai:cds.cern.ch:22596072017-01-20
spellingShingle hep-ex
Particle Physics - Experiment
hep-ph
Particle Physics - Phenomenology
Aguilar-Saavedra, J.A.
Degrande, C.
Khatibi, S.
Single top polarisation as a window to new physics
title Single top polarisation as a window to new physics
title_full Single top polarisation as a window to new physics
title_fullStr Single top polarisation as a window to new physics
title_full_unstemmed Single top polarisation as a window to new physics
title_short Single top polarisation as a window to new physics
title_sort single top polarisation as a window to new physics
topic hep-ex
Particle Physics - Experiment
hep-ph
Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/j.physletb.2017.04.023
http://cds.cern.ch/record/2259607
work_keys_str_mv AT aguilarsaavedraja singletoppolarisationasawindowtonewphysics
AT degrandec singletoppolarisationasawindowtonewphysics
AT khatibis singletoppolarisationasawindowtonewphysics

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