Pseudoscalar top-Higgs coupling: exploration of CP-odd observables to resolve the sign ambiguity

Autores
Mileo, Nicolás Ismael; Kiers, Ken; Szynkman, Alejandro Andrés; Crane, Daniel; Gegner, Ethan
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present a collection of CP-odd observables for the process pp→t(→bℓ+νℓ)t¯(→b¯ℓ−ν¯ℓ)H that are linearly dependent on the scalar (kt) and pseudoscalar (k˜ t) top-Higgs coupling and hence sensitive to the corresponding relative sign. The proposed observables are based on triple product (TP) correlations that we extract from the expression for the differential cross section in terms of the spin vectors of the top and antitop quarks. In order to explore other possibilities, we progressively modify these TPs, first by combining them, and then by replacing the spin vectors by the lepton momenta or the t and t¯ momenta by their visible parts. We generate Monte Carlo data sets for several benchmark scenarios, including the Standard Model (kt=1,k˜t=0) and two scenarios with mixed CP properties (kt=1,k˜t=±1). Assuming an integrated luminosity that is consistent with that envisioned for the High Luminosity Large Hadron Collider, using Monte Carlo-truth and taking into account only statistical uncertainties, we find that the most promising observable can disentangle the “CP-mixed” scenarios with an effective separation of ∼ 19σ. In the case of observables that do not require the reconstruction of the t and t momenta, the power of discrimination is up to ∼ 13σ for the same number of events. We also show that the most promising observables can still disentangle the CP-mixed scenarios when the number of events is reduced to values consistent with expectations for the Large Hadron Collider in the near term.
Fil: Mileo, Nicolás Ismael. Universidad Nacional de La Plata; Argentina
Fil: Kiers, Ken. Taylor University; Estados Unidos
Fil: Szynkman, Alejandro Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina
Fil: Crane, Daniel. Taylor University; Estados Unidos
Fil: Gegner, Ethan. Taylor University; Estados Unidos
Materia
Higgs
Top
LHC
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:11336/70905
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/70905
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Pseudoscalar top-Higgs coupling: exploration of CP-odd observables to resolve the sign ambiguityMileo, Nicolás IsmaelKiers, KenSzynkman, Alejandro AndrésCrane, DanielGegner, EthanHiggsTopLHChttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We present a collection of CP-odd observables for the process pp→t(→bℓ+νℓ)t¯(→b¯ℓ−ν¯ℓ)H that are linearly dependent on the scalar (kt) and pseudoscalar (k˜ t) top-Higgs coupling and hence sensitive to the corresponding relative sign. The proposed observables are based on triple product (TP) correlations that we extract from the expression for the differential cross section in terms of the spin vectors of the top and antitop quarks. In order to explore other possibilities, we progressively modify these TPs, first by combining them, and then by replacing the spin vectors by the lepton momenta or the t and t¯ momenta by their visible parts. We generate Monte Carlo data sets for several benchmark scenarios, including the Standard Model (kt=1,k˜t=0) and two scenarios with mixed CP properties (kt=1,k˜t=±1). Assuming an integrated luminosity that is consistent with that envisioned for the High Luminosity Large Hadron Collider, using Monte Carlo-truth and taking into account only statistical uncertainties, we find that the most promising observable can disentangle the “CP-mixed” scenarios with an effective separation of ∼ 19σ. In the case of observables that do not require the reconstruction of the t and t momenta, the power of discrimination is up to ∼ 13σ for the same number of events. We also show that the most promising observables can still disentangle the CP-mixed scenarios when the number of events is reduced to values consistent with expectations for the Large Hadron Collider in the near term.Fil: Mileo, Nicolás Ismael. Universidad Nacional de La Plata; ArgentinaFil: Kiers, Ken. Taylor University; Estados UnidosFil: Szynkman, Alejandro Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; ArgentinaFil: Crane, Daniel. Taylor University; Estados UnidosFil: Gegner, Ethan. Taylor University; Estados UnidosSpringer2016-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/70905Mileo, Nicolás Ismael; Kiers, Ken; Szynkman, Alejandro Andrés; Crane, Daniel; Gegner, Ethan; Pseudoscalar top-Higgs coupling: exploration of CP-odd observables to resolve the sign ambiguity; Springer; Journal of High Energy Physics; 2016; 7; 7-20161029-8479CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP07(2016)056info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007%2FJHEP07%282016%29056info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:38:55Zoai:ri.conicet.gov.ar:11336/70905instacron: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:34982025-09-29 10:38:55.466CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Pseudoscalar top-Higgs coupling: exploration of CP-odd observables to resolve the sign ambiguity
title Pseudoscalar top-Higgs coupling: exploration of CP-odd observables to resolve the sign ambiguity
spellingShingle Pseudoscalar top-Higgs coupling: exploration of CP-odd observables to resolve the sign ambiguity
Mileo, Nicolás Ismael
Higgs
Top
LHC
title_short Pseudoscalar top-Higgs coupling: exploration of CP-odd observables to resolve the sign ambiguity
title_full Pseudoscalar top-Higgs coupling: exploration of CP-odd observables to resolve the sign ambiguity
title_fullStr Pseudoscalar top-Higgs coupling: exploration of CP-odd observables to resolve the sign ambiguity
title_full_unstemmed Pseudoscalar top-Higgs coupling: exploration of CP-odd observables to resolve the sign ambiguity
title_sort Pseudoscalar top-Higgs coupling: exploration of CP-odd observables to resolve the sign ambiguity
dc.creator.none.fl_str_mv Mileo, Nicolás Ismael
Kiers, Ken
Szynkman, Alejandro Andrés
Crane, Daniel
Gegner, Ethan
author Mileo, Nicolás Ismael
author_facet Mileo, Nicolás Ismael
Kiers, Ken
Szynkman, Alejandro Andrés
Crane, Daniel
Gegner, Ethan
author_role author
author2 Kiers, Ken
Szynkman, Alejandro Andrés
Crane, Daniel
Gegner, Ethan
author2_role author
author
author
author
dc.subject.none.fl_str_mv Higgs
Top
LHC
topic Higgs
Top
LHC
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We present a collection of CP-odd observables for the process pp→t(→bℓ+νℓ)t¯(→b¯ℓ−ν¯ℓ)H that are linearly dependent on the scalar (kt) and pseudoscalar (k˜ t) top-Higgs coupling and hence sensitive to the corresponding relative sign. The proposed observables are based on triple product (TP) correlations that we extract from the expression for the differential cross section in terms of the spin vectors of the top and antitop quarks. In order to explore other possibilities, we progressively modify these TPs, first by combining them, and then by replacing the spin vectors by the lepton momenta or the t and t¯ momenta by their visible parts. We generate Monte Carlo data sets for several benchmark scenarios, including the Standard Model (kt=1,k˜t=0) and two scenarios with mixed CP properties (kt=1,k˜t=±1). Assuming an integrated luminosity that is consistent with that envisioned for the High Luminosity Large Hadron Collider, using Monte Carlo-truth and taking into account only statistical uncertainties, we find that the most promising observable can disentangle the “CP-mixed” scenarios with an effective separation of ∼ 19σ. In the case of observables that do not require the reconstruction of the t and t momenta, the power of discrimination is up to ∼ 13σ for the same number of events. We also show that the most promising observables can still disentangle the CP-mixed scenarios when the number of events is reduced to values consistent with expectations for the Large Hadron Collider in the near term.
Fil: Mileo, Nicolás Ismael. Universidad Nacional de La Plata; Argentina
Fil: Kiers, Ken. Taylor University; Estados Unidos
Fil: Szynkman, Alejandro Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina
Fil: Crane, Daniel. Taylor University; Estados Unidos
Fil: Gegner, Ethan. Taylor University; Estados Unidos
description We present a collection of CP-odd observables for the process pp→t(→bℓ+νℓ)t¯(→b¯ℓ−ν¯ℓ)H that are linearly dependent on the scalar (kt) and pseudoscalar (k˜ t) top-Higgs coupling and hence sensitive to the corresponding relative sign. The proposed observables are based on triple product (TP) correlations that we extract from the expression for the differential cross section in terms of the spin vectors of the top and antitop quarks. In order to explore other possibilities, we progressively modify these TPs, first by combining them, and then by replacing the spin vectors by the lepton momenta or the t and t¯ momenta by their visible parts. We generate Monte Carlo data sets for several benchmark scenarios, including the Standard Model (kt=1,k˜t=0) and two scenarios with mixed CP properties (kt=1,k˜t=±1). Assuming an integrated luminosity that is consistent with that envisioned for the High Luminosity Large Hadron Collider, using Monte Carlo-truth and taking into account only statistical uncertainties, we find that the most promising observable can disentangle the “CP-mixed” scenarios with an effective separation of ∼ 19σ. In the case of observables that do not require the reconstruction of the t and t momenta, the power of discrimination is up to ∼ 13σ for the same number of events. We also show that the most promising observables can still disentangle the CP-mixed scenarios when the number of events is reduced to values consistent with expectations for the Large Hadron Collider in the near term.
publishDate 2016
dc.date.none.fl_str_mv 2016-07
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/11336/70905
Mileo, Nicolás Ismael; Kiers, Ken; Szynkman, Alejandro Andrés; Crane, Daniel; Gegner, Ethan; Pseudoscalar top-Higgs coupling: exploration of CP-odd observables to resolve the sign ambiguity; Springer; Journal of High Energy Physics; 2016; 7; 7-2016
1029-8479
CONICET Digital
CONICET
url http://hdl.handle.net/11336/70905
identifier_str_mv Mileo, Nicolás Ismael; Kiers, Ken; Szynkman, Alejandro Andrés; Crane, Daniel; Gegner, Ethan; Pseudoscalar top-Higgs coupling: exploration of CP-odd observables to resolve the sign ambiguity; Springer; Journal of High Energy Physics; 2016; 7; 7-2016
1029-8479
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP07(2016)056
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007%2FJHEP07%282016%29056
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
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
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 13.070432

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