Analysis of events with b-jets and a pair of leptons of the same charge in pp collisions at √s = 8 TeV with the ATLAS detector

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An analysis is presented of events containing jets including at least one b-tagged jet, sizeable missing transverse momentum, and at least two leptons including a pair of the same electric charge, with the scalar sum of the jet and lepton transverse momenta being large. A data sample with an integra...

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Autores principales:	Alconada Verzini, María Josefina, Alonso, Francisco, Arduh, Francisco Anuar, Dova, María Teresa, Monticelli, Fernando Gabriel, Wahlberg, Hernán Pablo, The ATLAS Collaboration
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2015
Materias:	Ciencias Exactas Física Beyond Standard Model chiral b’ Exotics four-top-production Hadron-Hadron Scattering Lepton production same charge top pair vector-like quarks
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/86896
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-86896
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Ciencias Exactas Física Beyond Standard Model chiral b’ Exotics four-top-production Hadron-Hadron Scattering Lepton production same charge top pair vector-like quarks
spellingShingle	Ciencias Exactas Física Beyond Standard Model chiral b’ Exotics four-top-production Hadron-Hadron Scattering Lepton production same charge top pair vector-like quarks Alconada Verzini, María Josefina Alonso, Francisco Arduh, Francisco Anuar Dova, María Teresa Monticelli, Fernando Gabriel Wahlberg, Hernán Pablo The ATLAS Collaboration Analysis of events with b-jets and a pair of leptons of the same charge in pp collisions at √s = 8 TeV with the ATLAS detector
topic_facet	Ciencias Exactas Física Beyond Standard Model chiral b’ Exotics four-top-production Hadron-Hadron Scattering Lepton production same charge top pair vector-like quarks
description	An analysis is presented of events containing jets including at least one b-tagged jet, sizeable missing transverse momentum, and at least two leptons including a pair of the same electric charge, with the scalar sum of the jet and lepton transverse momenta being large. A data sample with an integrated luminosity of 20.3 fb<sup>-1</sup> of pp collisions at √s = 8 TeV recorded by the ATLAS detector at the Large Hadron Collider is used. Standard Model processes rarely produce these final states, but there are several models of physics beyond the Standard Model that predict an enhanced rate of production of such events; the ones considered here are production of vector-like quarks, enhanced four-top-quark production, pair production of chiral b′-quarks, and production of two positively charged top quarks. Eleven signal regions are defined; subsets of these regions are combined when searching for each class of models. In the three signal regions primarily sensitive to positively charged top quark pair production, the data yield is consistent with the background expectation. There are more data events than expected from background in the set of eight signal regions defined for searching for vector-like quarks and chiral b′-quarks, but the significance of the discrepancy is less than two standard deviations. The discrepancy reaches 2.5 standard deviations in the set of five signal regions defined for searching for four-top-quark production. The results are used to set 95% CL limits on various models.
format	Articulo Articulo
author	Alconada Verzini, María Josefina Alonso, Francisco Arduh, Francisco Anuar Dova, María Teresa Monticelli, Fernando Gabriel Wahlberg, Hernán Pablo The ATLAS Collaboration
author_facet	Alconada Verzini, María Josefina Alonso, Francisco Arduh, Francisco Anuar Dova, María Teresa Monticelli, Fernando Gabriel Wahlberg, Hernán Pablo The ATLAS Collaboration
author_sort	Alconada Verzini, María Josefina
title	Analysis of events with b-jets and a pair of leptons of the same charge in pp collisions at √s = 8 TeV with the ATLAS detector
title_short	Analysis of events with b-jets and a pair of leptons of the same charge in pp collisions at √s = 8 TeV with the ATLAS detector
title_full	Analysis of events with b-jets and a pair of leptons of the same charge in pp collisions at √s = 8 TeV with the ATLAS detector
title_fullStr	Analysis of events with b-jets and a pair of leptons of the same charge in pp collisions at √s = 8 TeV with the ATLAS detector
title_full_unstemmed	Analysis of events with b-jets and a pair of leptons of the same charge in pp collisions at √s = 8 TeV with the ATLAS detector
title_sort	analysis of events with b-jets and a pair of leptons of the same charge in pp collisions at √s = 8 tev with the atlas detector
publishDate	2015
url	http://sedici.unlp.edu.ar/handle/10915/86896
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Analysis of events with b-jets and a pair of leptons of the same charge in pp collisions at √s = 8 TeV with the ATLAS detector

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