Measuring | V t d | at the LHC

Autores
Alvarez, Ezequiel; Da Rold, Leandro; Estevez, Mariel; Kamenik, Jernej F.
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We propose a direct measurement of the Cabibbo-Kobayashi-Maskawa element Vtd at the LHC. Making use of the imbalance between d and d quark content in the proton, we show that a nonzero Vtd induces a charge asymmetry in the tW associated production. The main backgrounds to this process - tt production, and tW-associated production mediated by Vtb - give charge-symmetric contributions at leading order in QCD. Therefore, using specific kinematic features of the signal, we construct a charge asymmetry in the dilepton final state which - due also to a reduction of systematic uncertainties in the asymmetry - is potentially sensitive to Vtd suppressed effects. In particular, using signal and background simulations up to the detector level, we show that this new observable could already improve the current direct upper bound on |Vtd| with existing LHC data. We also project that |Vtd| values down to ∼10 times the standard model prediction could be probed at the high-luminosity LHC.
Fil: Alvarez, Ezequiel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Martín; Argentina
Fil: Da Rold, Leandro. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina
Fil: Estevez, Mariel. Universidad Nacional de San Martín; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Kamenik, Jernej F.. University of Ljubljana; Eslovenia. Jožef Stefan Institute; Eslovenia
Materia
Particle interactions
W & Z bosons
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/93068
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Measuring | V t d | at the LHCAlvarez, EzequielDa Rold, LeandroEstevez, MarielKamenik, Jernej F.Particle interactionsW & Z bosonshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1https://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We propose a direct measurement of the Cabibbo-Kobayashi-Maskawa element Vtd at the LHC. Making use of the imbalance between d and d quark content in the proton, we show that a nonzero Vtd induces a charge asymmetry in the tW associated production. The main backgrounds to this process - tt production, and tW-associated production mediated by Vtb - give charge-symmetric contributions at leading order in QCD. Therefore, using specific kinematic features of the signal, we construct a charge asymmetry in the dilepton final state which - due also to a reduction of systematic uncertainties in the asymmetry - is potentially sensitive to Vtd suppressed effects. In particular, using signal and background simulations up to the detector level, we show that this new observable could already improve the current direct upper bound on |Vtd| with existing LHC data. We also project that |Vtd| values down to ∼10 times the standard model prediction could be probed at the high-luminosity LHC.Fil: Alvarez, Ezequiel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Martín; ArgentinaFil: Da Rold, Leandro. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; ArgentinaFil: Estevez, Mariel. Universidad Nacional de San Martín; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Kamenik, Jernej F.. University of Ljubljana; Eslovenia. Jožef Stefan Institute; EsloveniaAmerican Physical Society2018-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/93068Alvarez, Ezequiel; Da Rold, Leandro; Estevez, Mariel; Kamenik, Jernej F.; Measuring | V t d | at the LHC; American Physical Society; Physical Review D; 97; 3; 2-2018; 1-102470-00102470-0029CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://link.aps.org/doi/10.1103/PhysRevD.97.033002info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevD.97.033002info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:34:38Zoai:ri.conicet.gov.ar:11336/93068instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 11:34:39.214CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Measuring | V t d | at the LHC
title Measuring | V t d | at the LHC
spellingShingle Measuring | V t d | at the LHC
Alvarez, Ezequiel
Particle interactions
W & Z bosons
title_short Measuring | V t d | at the LHC
title_full Measuring | V t d | at the LHC
title_fullStr Measuring | V t d | at the LHC
title_full_unstemmed Measuring | V t d | at the LHC
title_sort Measuring | V t d | at the LHC
dc.creator.none.fl_str_mv Alvarez, Ezequiel
Da Rold, Leandro
Estevez, Mariel
Kamenik, Jernej F.
author Alvarez, Ezequiel
author_facet Alvarez, Ezequiel
Da Rold, Leandro
Estevez, Mariel
Kamenik, Jernej F.
author_role author
author2 Da Rold, Leandro
Estevez, Mariel
Kamenik, Jernej F.
author2_role author
author
author
dc.subject.none.fl_str_mv Particle interactions
W & Z bosons
topic Particle interactions
W & Z bosons
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We propose a direct measurement of the Cabibbo-Kobayashi-Maskawa element Vtd at the LHC. Making use of the imbalance between d and d quark content in the proton, we show that a nonzero Vtd induces a charge asymmetry in the tW associated production. The main backgrounds to this process - tt production, and tW-associated production mediated by Vtb - give charge-symmetric contributions at leading order in QCD. Therefore, using specific kinematic features of the signal, we construct a charge asymmetry in the dilepton final state which - due also to a reduction of systematic uncertainties in the asymmetry - is potentially sensitive to Vtd suppressed effects. In particular, using signal and background simulations up to the detector level, we show that this new observable could already improve the current direct upper bound on |Vtd| with existing LHC data. We also project that |Vtd| values down to ∼10 times the standard model prediction could be probed at the high-luminosity LHC.
Fil: Alvarez, Ezequiel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Martín; Argentina
Fil: Da Rold, Leandro. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina
Fil: Estevez, Mariel. Universidad Nacional de San Martín; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Kamenik, Jernej F.. University of Ljubljana; Eslovenia. Jožef Stefan Institute; Eslovenia
description We propose a direct measurement of the Cabibbo-Kobayashi-Maskawa element Vtd at the LHC. Making use of the imbalance between d and d quark content in the proton, we show that a nonzero Vtd induces a charge asymmetry in the tW associated production. The main backgrounds to this process - tt production, and tW-associated production mediated by Vtb - give charge-symmetric contributions at leading order in QCD. Therefore, using specific kinematic features of the signal, we construct a charge asymmetry in the dilepton final state which - due also to a reduction of systematic uncertainties in the asymmetry - is potentially sensitive to Vtd suppressed effects. In particular, using signal and background simulations up to the detector level, we show that this new observable could already improve the current direct upper bound on |Vtd| with existing LHC data. We also project that |Vtd| values down to ∼10 times the standard model prediction could be probed at the high-luminosity LHC.
publishDate 2018
dc.date.none.fl_str_mv 2018-02
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/93068
Alvarez, Ezequiel; Da Rold, Leandro; Estevez, Mariel; Kamenik, Jernej F.; Measuring | V t d | at the LHC; American Physical Society; Physical Review D; 97; 3; 2-2018; 1-10
2470-0010
2470-0029
CONICET Digital
CONICET
url http://hdl.handle.net/11336/93068
identifier_str_mv Alvarez, Ezequiel; Da Rold, Leandro; Estevez, Mariel; Kamenik, Jernej F.; Measuring | V t d | at the LHC; American Physical Society; Physical Review D; 97; 3; 2-2018; 1-10
2470-0010
2470-0029
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://link.aps.org/doi/10.1103/PhysRevD.97.033002
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevD.97.033002
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.982451

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