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Constraints on the Higgs boson width from off-shell production and decay to ZZ to llll and llvv
We constrain the total Higgs boson width, $\Gamma_{\mathrm{H}}$, using off-shell production and decay to four leptons, $4\ell$, or two leptons plus two neutrinos, $2\ell 2\nu$, with $\ell = \mathrm{e},\mu$. The analysis is based on the data collected in 2012 by the CMS experiment at the LHC, corresp...
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2014
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Acceso en línea: | http://cds.cern.ch/record/1670066 |
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author | CMS Collaboration |
author_facet | CMS Collaboration |
author_sort | CMS Collaboration |
collection | CERN |
description | We constrain the total Higgs boson width, $\Gamma_{\mathrm{H}}$, using off-shell
production and decay to four leptons, $4\ell$, or two leptons plus two neutrinos, $2\ell 2\nu$,
with $\ell = \mathrm{e},\mu$. The analysis is based on the data collected in 2012 by the
CMS experiment at the LHC, corresponding to an integrated luminosity ${\cal L} = 19.7 \mathrm{fb^{-1}}$ at a center-of-mass energy $\surd s = 8 \, {\rm TeV}$. The $4\ell$ analysis uses the ZZ
invariant mass distribution as well as a matrix
element likelihood discriminant to separate the ZZ components originating from gluon- and
quark-initiated processes. The $2\ell 2\nu$ analysis relies on the transverse mass or missing transverse energy distributions
in jet categories. An unbinned maximum-likelihood fit of the above distributions, combined with the $4\ell$ measurement near the resonance peak, leads to an upper limit on the Higgs boson width
of $\Gamma_{\mathrm{H}} < 4.2 \times \Gamma_{\mathrm{H}}^{\mathrm{SM}}$ at the 95\% confidence level, assuming $\Gamma_{\mathrm{H}}^{\mathrm{SM}} = 4.15 \, {\rm MeV}$. This result
considerably improves over previous experimental constraints from the measurement near the resonance peak. |
id | cern-1670066 |
institution | Organización Europea para la Investigación Nuclear |
publishDate | 2014 |
record_format | invenio |
spelling | cern-16700662019-09-30T06:29:59Zhttp://cds.cern.ch/record/1670066CMS CollaborationConstraints on the Higgs boson width from off-shell production and decay to ZZ to llll and llvvParticle Physics - ExperimentWe constrain the total Higgs boson width, $\Gamma_{\mathrm{H}}$, using off-shell production and decay to four leptons, $4\ell$, or two leptons plus two neutrinos, $2\ell 2\nu$, with $\ell = \mathrm{e},\mu$. The analysis is based on the data collected in 2012 by the CMS experiment at the LHC, corresponding to an integrated luminosity ${\cal L} = 19.7 \mathrm{fb^{-1}}$ at a center-of-mass energy $\surd s = 8 \, {\rm TeV}$. The $4\ell$ analysis uses the ZZ invariant mass distribution as well as a matrix element likelihood discriminant to separate the ZZ components originating from gluon- and quark-initiated processes. The $2\ell 2\nu$ analysis relies on the transverse mass or missing transverse energy distributions in jet categories. An unbinned maximum-likelihood fit of the above distributions, combined with the $4\ell$ measurement near the resonance peak, leads to an upper limit on the Higgs boson width of $\Gamma_{\mathrm{H}} < 4.2 \times \Gamma_{\mathrm{H}}^{\mathrm{SM}}$ at the 95\% confidence level, assuming $\Gamma_{\mathrm{H}}^{\mathrm{SM}} = 4.15 \, {\rm MeV}$. This result considerably improves over previous experimental constraints from the measurement near the resonance peak.CMS-PAS-HIG-14-002oai:cds.cern.ch:16700662014 |
spellingShingle | Particle Physics - Experiment CMS Collaboration Constraints on the Higgs boson width from off-shell production and decay to ZZ to llll and llvv |
title | Constraints on the Higgs boson width from off-shell production and decay to ZZ to llll and llvv |
title_full | Constraints on the Higgs boson width from off-shell production and decay to ZZ to llll and llvv |
title_fullStr | Constraints on the Higgs boson width from off-shell production and decay to ZZ to llll and llvv |
title_full_unstemmed | Constraints on the Higgs boson width from off-shell production and decay to ZZ to llll and llvv |
title_short | Constraints on the Higgs boson width from off-shell production and decay to ZZ to llll and llvv |
title_sort | constraints on the higgs boson width from off-shell production and decay to zz to llll and llvv |
topic | Particle Physics - Experiment |
url | http://cds.cern.ch/record/1670066 |
work_keys_str_mv | AT cmscollaboration constraintsonthehiggsbosonwidthfromoffshellproductionanddecaytozztollllandllvv |