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Higgs boson mass measurement using $H\to ZZ\to 4\ell$ decays at CMS
A summary of the methods used to make a precision measurement of the Higgs boson mass is presented. The final mass value for the Higgs boson is measured to be $m_{\rm H} = 125.26 \pm 0.21\ \mathrm{GeV}$. This analysis considers the $\mathrm{H} \rightarrow \mathrm{Z}\mathrm{Z} \rightarrow 4\ell$ chan...
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Lenguaje: | eng |
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2019
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Acceso en línea: | http://cds.cern.ch/record/2696101 |
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author | Rosenzweig, Jake |
author_facet | Rosenzweig, Jake |
author_sort | Rosenzweig, Jake |
collection | CERN |
description | A summary of the methods used to make a precision measurement of the Higgs boson mass is presented. The final mass value for the Higgs boson is measured to be $m_{\rm H} = 125.26 \pm 0.21\ \mathrm{GeV}$. This analysis considers the $\mathrm{H} \rightarrow \mathrm{Z}\mathrm{Z} \rightarrow 4\ell$ channel ($\ell = e, \mu$), using proton-proton collision data collected in 2016 corresponding to an integrated luminosity of $35.9\ \mathrm{fb}^{-1}$ at $\sqrt{s} = 13$ TeV by the CMS experiment at the LHC. A mass constraint is imposed on the invariant mass of the two leptons coming from the mostly on-shell Z boson to refit the lepton momenta and, hence, improve the measurement of the Higgs boson mass, per-event. The mass of the Higgs boson is extracted using a three-dimensional likelihood fit, which uses three observables per-event: (1) the refitted four-lepton invariant mass ($m'_{4\ell}$), (2) the refitted four-lepton mass uncertainty (${\mathcal D}'_{\rm mass}$), and (3) a matrix element-based kinematic discriminant (${\mathcal D}^{\rm kin}_{\rm bkg}$). |
id | cern-2696101 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2019 |
record_format | invenio |
spelling | cern-26961012020-06-16T12:12:42Zhttp://cds.cern.ch/record/2696101engRosenzweig, JakeHiggs boson mass measurement using $H\to ZZ\to 4\ell$ decays at CMShep-exParticle Physics - ExperimentA summary of the methods used to make a precision measurement of the Higgs boson mass is presented. The final mass value for the Higgs boson is measured to be $m_{\rm H} = 125.26 \pm 0.21\ \mathrm{GeV}$. This analysis considers the $\mathrm{H} \rightarrow \mathrm{Z}\mathrm{Z} \rightarrow 4\ell$ channel ($\ell = e, \mu$), using proton-proton collision data collected in 2016 corresponding to an integrated luminosity of $35.9\ \mathrm{fb}^{-1}$ at $\sqrt{s} = 13$ TeV by the CMS experiment at the LHC. A mass constraint is imposed on the invariant mass of the two leptons coming from the mostly on-shell Z boson to refit the lepton momenta and, hence, improve the measurement of the Higgs boson mass, per-event. The mass of the Higgs boson is extracted using a three-dimensional likelihood fit, which uses three observables per-event: (1) the refitted four-lepton invariant mass ($m'_{4\ell}$), (2) the refitted four-lepton mass uncertainty (${\mathcal D}'_{\rm mass}$), and (3) a matrix element-based kinematic discriminant (${\mathcal D}^{\rm kin}_{\rm bkg}$).arXiv:1910.09607oai:cds.cern.ch:26961012019 |
spellingShingle | hep-ex Particle Physics - Experiment Rosenzweig, Jake Higgs boson mass measurement using $H\to ZZ\to 4\ell$ decays at CMS |
title | Higgs boson mass measurement using $H\to ZZ\to 4\ell$ decays at CMS |
title_full | Higgs boson mass measurement using $H\to ZZ\to 4\ell$ decays at CMS |
title_fullStr | Higgs boson mass measurement using $H\to ZZ\to 4\ell$ decays at CMS |
title_full_unstemmed | Higgs boson mass measurement using $H\to ZZ\to 4\ell$ decays at CMS |
title_short | Higgs boson mass measurement using $H\to ZZ\to 4\ell$ decays at CMS |
title_sort | higgs boson mass measurement using $h\to zz\to 4\ell$ decays at cms |
topic | hep-ex Particle Physics - Experiment |
url | http://cds.cern.ch/record/2696101 |
work_keys_str_mv | AT rosenzweigjake higgsbosonmassmeasurementusinghtozzto4elldecaysatcms |