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

The CMS collaboration

doi:10.1038/s41567-022-01682-0

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

The CMS collaboration

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Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

Résumé

Since 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 ΓH=3.2−1.7+2.4MeV, 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.

langue originale	Anglais
Pages (de - à)	1329-1334
Nombre de pages	6
journal	Nature Physics
Volume	18
Numéro de publication	11
Les DOIs	https://doi.org/10.1038/s41567-022-01682-0
état	Publié - 1 nov. 2022

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10.1038/s41567-022-01682-0

Contient cette citation

@article{4a86b34a7dfc48f5912ea1fcb5aa6ad4,

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

abstract = "Since 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 ΓH=3.2−1.7+2.4MeV, 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.",

author = "\{The CMS collaboration\} and A. Tumasyan and W. Adam and Andrejkovic, \{J. W.\} and T. Bergauer and S. Chatterjee and K. Damanakis and M. Dragicevic and \{Del Valle\}, \{A. Escalante\} and R. Fr{\"u}hwirth and M. Jeitler and N. Krammer and L. Lechner and D. Liko and I. Mikulec and P. Paulitsch and Pitters, \{F. M.\} and J. Schieck and R. Sch{\"o}fbeck and D. Schwarz and S. Templ and W. Waltenberger and Wulz, \{C. E.\} and V. Chekhovsky and A. Litomin and V. Makarenko and Darwish, \{M. R.\} and \{De Wolf\}, \{E. A.\} and T. Janssen and T. Kello and A. Lelek and Sfar, \{H. Rejeb\} and \{Van Mechelen\}, P. and \{Van Putte\}, S. and \{Van Remortel\}, N. and Bols, \{E. S.\} and J. D{\textquoteright}Hondt and \{De Moor\}, A. and M. Delcourt and \{El Faham\}, H. and F. Beaudette and A. Cappati and O. Davignon and \{de Cassagnac\}, \{R. Granier\} and M. Nguyen and C. Ochando and P. Paganini and R. Salerno and A. Zabi and A. Zghiche and \{De Wit\}, A.",

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doi = "10.1038/s41567-022-01682-0",

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AU - Bergauer, T.

AU - Chatterjee, S.

AU - Damanakis, K.

AU - Dragicevic, M.

AU - Del Valle, A. Escalante

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AU - Makarenko, V.

AU - Darwish, M. R.

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AU - Janssen, T.

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AU - Lelek, A.

AU - Sfar, H. Rejeb

AU - Van Mechelen, P.

AU - Van Putte, S.

AU - Van Remortel, N.

AU - Bols, E. S.

AU - D’Hondt, J.

AU - De Moor, A.

AU - Delcourt, M.

AU - El Faham, H.

AU - Beaudette, F.

AU - Cappati, A.

AU - Davignon, O.

AU - de Cassagnac, R. Granier

AU - Nguyen, M.

AU - Ochando, C.

AU - Paganini, P.

AU - Salerno, R.

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AU - De Wit, A.

PY - 2022/11/1

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N2 - Since 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 ΓH=3.2−1.7+2.4MeV, 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.

AB - Since 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 ΓH=3.2−1.7+2.4MeV, 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.

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DO - 10.1038/s41567-022-01682-0

M3 - Article

AN - SCOPUS:85140310896

SN - 1745-2473

VL - 18

SP - 1329

EP - 1334

JO - Nature Physics

JF - Nature Physics

IS - 11

ER -

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

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