# Higgs boson width from off-shell production and decay to ZZ

- Institution: CERN
- Department: LHC Seminar
- Speaker: Jian Wang
- Year: 2014
- Language: English
- Source: [CERN](https://videos.cern.ch/record/3014435)
- Licence: [CERN](http://copyright.web.cern.ch)
- Who can watch: Teens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

Constraints on the total Higgs boson width, Gamma_H, are presented using off-shell production and decay to ZZ in the 4l and 2l2nu final states. The analysis is based on data collected in 2012 by the CMS experiment at the LHC, corresponding to an integrated luminosity of L = 19.7/fb at a centre-of-mass energy of 8 TeV. The combined analysis of the 4l and 2l2nu events at high mass with the 4l measurement of the Higgs boson peak at 125.6 GeV leads to an upper limit on the Higgs boson width of Gamma_H < 4.2 x Gamma_H(SM) at the 95% confidence level, assuming Gamma_H(SM) = 4.15 MeV. This result considerably improves over previous experimental constraints from direct measurements at the Higgs resonance peak..

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## Lectures

1. [Higgs boson width from off-shell production and decay to ZZ](https://invisiblenetwork.ai/learn/cern/3014435/655032a09674), 51 min (CERN's player)