Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production

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dc.citation.firstpage1329en_US
dc.citation.journalTitleNature Physicsen_US
dc.citation.lastpage1334en_US
dc.citation.volumeNumber18en_US
dc.contributor.authorThe CMS Collaborationen_US
dc.date.accessioned2022-12-13T19:11:36Zen_US
dc.date.available2022-12-13T19:11:36Zen_US
dc.date.issued2022en_US
dc.description.abstractSince the discovery of the Higgs boson in 2012, detailed studies of its properties have been ongoing. Besides its mass, its width—related to its lifetime—is an important parameter. One way to determine this quantity is to measure its off-shell production, where the Higgs boson mass is far away from its nominal value, and relating it to its on-shell production, where the mass is close to the nominal value. Here we report evidence for such off-shell contributions to the production cross-section of two Z bosons with data from the CMS experiment at the CERN Large Hadron Collider. We constrain the total rate of the off-shell Higgs boson contribution beyond the Z boson pair production threshold, relative to its standard model expectation, to the interval [0.0061, 2.0] at the 95% confidence level. The scenario with no off-shell contribution is excluded at a p-value of 0.0003 (3.6 standard deviations). We measure the width of the Higgs boson as $${{{\varGamma }}}_{{{{{{\rm{H}}}}}}}={3.2}_{-1.7}^{+2.4}\,{{{{{\rm{MeV}}}}}}$$, in agreement with the standard model expectation of 4.1 MeV. In addition, we set constraints on anomalous Higgs boson couplings to W and Z boson pairs.en_US
dc.identifier.citationThe CMS Collaboration. "Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production." <i>Nature Physics,</i> 18, (2022) Springer Nature: 1329-1334. https://doi.org/10.1038/s41567-022-01682-0.en_US
dc.identifier.digitals41567-022-01682-0en_US
dc.identifier.doihttps://doi.org/10.1038/s41567-022-01682-0en_US
dc.identifier.urihttps://hdl.handle.net/1911/114125en_US
dc.language.isoengen_US
dc.publisherSpringer Natureen_US
dc.rightsThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.titleMeasurement of the Higgs boson width and evidence of its off-shell contributions to ZZ productionen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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