Journal article
Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production
Nature physics, Vol.18, pp.1329-1334
10/22/2022
DOI: 10.1038/s41567-022-01682-0
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+2.4−1.7MeV, 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.
Details
- Title: Subtitle
- Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production
- Creators
- CMS Collaboration (Institution)M. Alhusseini - University of IowaKamuran Dilsiz - University of Iowa, Physics and AstronomyL. Emediato - University of IowaR. P. Gandrajula - University of IowaO Koseyan - University of IowaJ-P Merlo - University of IowaAlexi Mestvirishvili - University of Iowa, Physics and AstronomyJane M Nachtman - University of Iowa, Physics and AstronomyHasan Ogul - University of Iowa, Physics and AstronomyYasar Onel - University of Iowa, Physics and AstronomyAldo Penzo - University of Iowa, Physics and AstronomyC. Snyder - University of IowaE. Tiras - University of IowaKai Yi - University of Iowa, Physics and Astronomy
- Resource Type
- Journal article
- Publication Details
- Nature physics, Vol.18, pp.1329-1334
- DOI
- 10.1038/s41567-022-01682-0
- ISSN
- 1745-2473
- eISSN
- 1745-2481
- Publisher
- Springer Nature
- Grant note
- name: Please see spreadsheet included with submission. Includes complete information for all funding agencies.
- Language
- English
- Date published
- 10/22/2022
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984439158602771
Metrics
10 Record Views