A model-independent search is presented for the production of heavy
resonances decaying into top-antitop quark pairs, seen as excesses above the
standard model prediction in the t t-bar invariant mass spectrum. Events
containing one lepton (muon or electron) and at least two jets are selected
from data samples corresponding to 4.4-5.0 inverse femtobarns of integrated
luminosity collected by the CMS experiment in pp collisions at sqrt(s) = 7 TeV
at the LHC. Results are presented from the combination of two dedicated
searches optimized for boosted production and production at threshold. No
excess of events is observed over the expected yield from the standard model
processes. Topcolor Z' bosons with narrow (wide) width are excluded at 95%
confidence level for masses below 1.49 (2.04) TeV and an upper limit of 0.3
(1.3) pb or lower is set on the production cross section times branching
fraction for resonance masses above 1 TeV. Kaluza-Klein excitations of a gluon
with masses below 1.82 TeV (at 95% confidence level) in the Randall-Sundrum
model are also excluded, and an upper limit of 0.7 pb or lower is set on the
production cross section times branching fraction for resonance masses above 1
TeV.
Description
Search for resonant t t-bar production in lepton+jets events in pp
collisions at sqrt(s)=7 TeV
%0 Generic
%1 ZPrimeLimitsCMS2012
%A Collaboration, CMS
%D 2012
%K myown quark resonant search top zprime
%T Search for resonant t t-bar production in lepton+jets events in pp
collisions at sqrt(s)=7 TeV
%U http://arxiv.org/abs/1209.4397
%X A model-independent search is presented for the production of heavy
resonances decaying into top-antitop quark pairs, seen as excesses above the
standard model prediction in the t t-bar invariant mass spectrum. Events
containing one lepton (muon or electron) and at least two jets are selected
from data samples corresponding to 4.4-5.0 inverse femtobarns of integrated
luminosity collected by the CMS experiment in pp collisions at sqrt(s) = 7 TeV
at the LHC. Results are presented from the combination of two dedicated
searches optimized for boosted production and production at threshold. No
excess of events is observed over the expected yield from the standard model
processes. Topcolor Z' bosons with narrow (wide) width are excluded at 95%
confidence level for masses below 1.49 (2.04) TeV and an upper limit of 0.3
(1.3) pb or lower is set on the production cross section times branching
fraction for resonance masses above 1 TeV. Kaluza-Klein excitations of a gluon
with masses below 1.82 TeV (at 95% confidence level) in the Randall-Sundrum
model are also excluded, and an upper limit of 0.7 pb or lower is set on the
production cross section times branching fraction for resonance masses above 1
TeV.
@misc{ZPrimeLimitsCMS2012,
abstract = {A model-independent search is presented for the production of heavy
resonances decaying into top-antitop quark pairs, seen as excesses above the
standard model prediction in the t t-bar invariant mass spectrum. Events
containing one lepton (muon or electron) and at least two jets are selected
from data samples corresponding to 4.4-5.0 inverse femtobarns of integrated
luminosity collected by the CMS experiment in pp collisions at sqrt(s) = 7 TeV
at the LHC. Results are presented from the combination of two dedicated
searches optimized for boosted production and production at threshold. No
excess of events is observed over the expected yield from the standard model
processes. Topcolor Z' bosons with narrow (wide) width are excluded at 95%
confidence level for masses below 1.49 (2.04) TeV and an upper limit of 0.3
(1.3) pb or lower is set on the production cross section times branching
fraction for resonance masses above 1 TeV. Kaluza-Klein excitations of a gluon
with masses below 1.82 TeV (at 95% confidence level) in the Randall-Sundrum
model are also excluded, and an upper limit of 0.7 pb or lower is set on the
production cross section times branching fraction for resonance masses above 1
TeV.},
added-at = {2012-10-15T16:22:28.000+0200},
author = {Collaboration, CMS},
biburl = {https://www.bibsonomy.org/bibtex/2eb20b58293c8787a507db1c7661e69c4/kreczko},
description = {Search for resonant t t-bar production in lepton+jets events in pp
collisions at sqrt(s)=7 TeV},
interhash = {983ed53ca61318233c704b9ab1d8d616},
intrahash = {eb20b58293c8787a507db1c7661e69c4},
keywords = {myown quark resonant search top zprime},
note = {arxiv:1209.4397},
timestamp = {2014-07-27T00:02:59.000+0200},
title = {Search for resonant t t-bar production in lepton+jets events in pp
collisions at sqrt(s)=7 TeV},
url = {http://arxiv.org/abs/1209.4397},
year = 2012
}