Enhancing the sensitivity to new physics in the tt̄ invariant mass distribution

Autores
Alvarez, Ezequiel
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We propose selection cuts on the LHC tt̄ production sample which should enhance the sensitivity to new physics signals in the study of the tt̄ invariant mass distribution. We show that selecting events in which the tt̄ object has little transverse and large longitudinal momentum enlarges the quark-fusion fraction of the sample and therefore increases its sensitivity to new physics which couples to quarks and not to gluons. We find that systematic error bars play a fundamental role and assume a simple model for them. We check how a non-visible new particle would become visible after the selection cuts enhance its resonance bump. A final realistic analysis should be done by the experimental groups with a correct evaluation of the systematic error bars. © 2012 American Physical Society.
Fil: Alvarez, Ezequiel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Física Aplicada ; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina
Materia
Top-Quark
Lhc
New Physics
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:11336/56608
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Enhancing the sensitivity to new physics in the tt̄ invariant mass distributionAlvarez, EzequielTop-QuarkLhcNew Physicshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We propose selection cuts on the LHC tt̄ production sample which should enhance the sensitivity to new physics signals in the study of the tt̄ invariant mass distribution. We show that selecting events in which the tt̄ object has little transverse and large longitudinal momentum enlarges the quark-fusion fraction of the sample and therefore increases its sensitivity to new physics which couples to quarks and not to gluons. We find that systematic error bars play a fundamental role and assume a simple model for them. We check how a non-visible new particle would become visible after the selection cuts enhance its resonance bump. A final realistic analysis should be done by the experimental groups with a correct evaluation of the systematic error bars. © 2012 American Physical Society.Fil: Alvarez, Ezequiel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Física Aplicada ; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; ArgentinaAmerican Physical Society2012-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/56608Alvarez, Ezequiel; Enhancing the sensitivity to new physics in the tt̄ invariant mass distribution; American Physical Society; Physical Review D: Particles, Fields, Gravitation and Cosmology; 86; 3; 8-2012; 37501-375051550-7998CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://prd.aps.org/abstract/PRD/v86/i3/e037501info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevD.86.037501info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:03:52Zoai:ri.conicet.gov.ar:11336/56608instacron: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 10:03:52.288CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Enhancing the sensitivity to new physics in the tt̄ invariant mass distribution
title Enhancing the sensitivity to new physics in the tt̄ invariant mass distribution
spellingShingle Enhancing the sensitivity to new physics in the tt̄ invariant mass distribution
Alvarez, Ezequiel
Top-Quark
Lhc
New Physics
title_short Enhancing the sensitivity to new physics in the tt̄ invariant mass distribution
title_full Enhancing the sensitivity to new physics in the tt̄ invariant mass distribution
title_fullStr Enhancing the sensitivity to new physics in the tt̄ invariant mass distribution
title_full_unstemmed Enhancing the sensitivity to new physics in the tt̄ invariant mass distribution
title_sort Enhancing the sensitivity to new physics in the tt̄ invariant mass distribution
dc.creator.none.fl_str_mv Alvarez, Ezequiel
author Alvarez, Ezequiel
author_facet Alvarez, Ezequiel
author_role author
dc.subject.none.fl_str_mv Top-Quark
Lhc
New Physics
topic Top-Quark
Lhc
New Physics
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 propose selection cuts on the LHC tt̄ production sample which should enhance the sensitivity to new physics signals in the study of the tt̄ invariant mass distribution. We show that selecting events in which the tt̄ object has little transverse and large longitudinal momentum enlarges the quark-fusion fraction of the sample and therefore increases its sensitivity to new physics which couples to quarks and not to gluons. We find that systematic error bars play a fundamental role and assume a simple model for them. We check how a non-visible new particle would become visible after the selection cuts enhance its resonance bump. A final realistic analysis should be done by the experimental groups with a correct evaluation of the systematic error bars. © 2012 American Physical Society.
Fil: Alvarez, Ezequiel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Física Aplicada ; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina
description We propose selection cuts on the LHC tt̄ production sample which should enhance the sensitivity to new physics signals in the study of the tt̄ invariant mass distribution. We show that selecting events in which the tt̄ object has little transverse and large longitudinal momentum enlarges the quark-fusion fraction of the sample and therefore increases its sensitivity to new physics which couples to quarks and not to gluons. We find that systematic error bars play a fundamental role and assume a simple model for them. We check how a non-visible new particle would become visible after the selection cuts enhance its resonance bump. A final realistic analysis should be done by the experimental groups with a correct evaluation of the systematic error bars. © 2012 American Physical Society.
publishDate 2012
dc.date.none.fl_str_mv 2012-08
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/11336/56608
Alvarez, Ezequiel; Enhancing the sensitivity to new physics in the tt̄ invariant mass distribution; American Physical Society; Physical Review D: Particles, Fields, Gravitation and Cosmology; 86; 3; 8-2012; 37501-37505
1550-7998
CONICET Digital
CONICET
url http://hdl.handle.net/11336/56608
identifier_str_mv Alvarez, Ezequiel; Enhancing the sensitivity to new physics in the tt̄ invariant mass distribution; American Physical Society; Physical Review D: Particles, Fields, Gravitation and Cosmology; 86; 3; 8-2012; 37501-37505
1550-7998
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://prd.aps.org/abstract/PRD/v86/i3/e037501
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevD.86.037501
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
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
_version_ 1844613859487252480
score 13.070432

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