Search for associated production of a Z boson with a single top quark
and for tZ flavour-changing interactions in pp collisions at sqrt(s) = 8 TeV
C. Collaboration. (2017)cite arxiv:1702.01404Comment: Submitted to JHEP. All figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/TOP-12-039.
Аннотация
A search for the production of a single top quark in association with a Z
boson is presented, both to identify the expected standard model process and to
search for flavour-changing neutral current interactions. The data sample
corresponds to an integrated luminosity of 19.7 inverse-femtobarns recorded by
the CMS experiment at the LHC in proton-proton collisions at sqrt(s) = 8 TeV.
Final states with three leptons (electrons or muons) and at least one jet are
investigated. An events yield compatible with tZq standard model production is
observed, and the corresponding cross section is measured to be sigma( p p -> t
Z q -> l nu b l+ l- q ) = 10 +8/-7 fb with a significance of 2.4 standard
deviations. No presence of flavour-changing neutral current production of tZq
is observed. Exclusion limits at 95% confidence level on the branching
fractions of a top quark decaying to a Z boson and an up or a charm quark are
found to be B( t -> Z u ) < 0.022% and B( t -> Z c ) < 0.049%.
Описание
Search for associated production of a Z boson with a single top quark
and for tZ flavour-changing interactions in pp collisions at sqrt(s) = 8 TeV
cite arxiv:1702.01404Comment: Submitted to JHEP. All figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/TOP-12-039
%0 Journal Article
%1 collaboration2017search
%A Collaboration, CMS
%D 2017
%K cms experiment single-top tZ
%T Search for associated production of a Z boson with a single top quark
and for tZ flavour-changing interactions in pp collisions at sqrt(s) = 8 TeV
%U http://arxiv.org/abs/1702.01404
%X A search for the production of a single top quark in association with a Z
boson is presented, both to identify the expected standard model process and to
search for flavour-changing neutral current interactions. The data sample
corresponds to an integrated luminosity of 19.7 inverse-femtobarns recorded by
the CMS experiment at the LHC in proton-proton collisions at sqrt(s) = 8 TeV.
Final states with three leptons (electrons or muons) and at least one jet are
investigated. An events yield compatible with tZq standard model production is
observed, and the corresponding cross section is measured to be sigma( p p -> t
Z q -> l nu b l+ l- q ) = 10 +8/-7 fb with a significance of 2.4 standard
deviations. No presence of flavour-changing neutral current production of tZq
is observed. Exclusion limits at 95% confidence level on the branching
fractions of a top quark decaying to a Z boson and an up or a charm quark are
found to be B( t -> Z u ) < 0.022% and B( t -> Z c ) < 0.049%.
@article{collaboration2017search,
abstract = {A search for the production of a single top quark in association with a Z
boson is presented, both to identify the expected standard model process and to
search for flavour-changing neutral current interactions. The data sample
corresponds to an integrated luminosity of 19.7 inverse-femtobarns recorded by
the CMS experiment at the LHC in proton-proton collisions at sqrt(s) = 8 TeV.
Final states with three leptons (electrons or muons) and at least one jet are
investigated. An events yield compatible with tZq standard model production is
observed, and the corresponding cross section is measured to be sigma( p p -> t
Z q -> l nu b l+ l- q ) = 10 +8/-7 fb with a significance of 2.4 standard
deviations. No presence of flavour-changing neutral current production of tZq
is observed. Exclusion limits at 95% confidence level on the branching
fractions of a top quark decaying to a Z boson and an up or a charm quark are
found to be B( t -> Z u ) < 0.022% and B( t -> Z c ) < 0.049%.},
added-at = {2017-02-08T10:07:04.000+0100},
author = {Collaboration, CMS},
biburl = {https://www.bibsonomy.org/bibtex/2de3070915c3c7f4036dbdf2ca25234fb/omkind},
description = {Search for associated production of a Z boson with a single top quark
and for tZ flavour-changing interactions in pp collisions at sqrt(s) = 8 TeV},
interhash = {af8ba32708d7b27ae1a52436219e8a82},
intrahash = {de3070915c3c7f4036dbdf2ca25234fb},
keywords = {cms experiment single-top tZ},
note = {cite arxiv:1702.01404Comment: Submitted to JHEP. All figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/TOP-12-039},
timestamp = {2017-02-08T10:07:04.000+0100},
title = {Search for associated production of a Z boson with a single top quark
and for tZ flavour-changing interactions in pp collisions at sqrt(s) = 8 TeV},
url = {http://arxiv.org/abs/1702.01404},
year = 2017
}