Limits on the Higgs boson lifetime and width from its decay to four charged leptonsopen access
- Authors
- Khachatryan, V; Sirunyan, AM; Tumasyan, A; Adam, W; Asilar, E; Bergauer, T; Brandstetter, J; Brondolin, E; Dragicevic, M; Kim, Tae Jeong
- Issue Date
- Oct-2015
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW D, v.92, no.7, pp.1 - 28
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICAL REVIEW D
- Volume
- 92
- Number
- 7
- Start Page
- 1
- End Page
- 28
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/142897
- DOI
- 10.1103/PhysRevD.92.072010
- ISSN
- 1550-7998
- Abstract
- Constraints on the lifetime and width of the Higgs boson are obtained from H -˃ ZZ -˃ 4l events using data recorded by the CMS experiment during the LHC run 1 with an integrated luminosity of 5.1 and 19.7 fb(-1) at a center-of-mass energy of 7 and 8 TeV, respectively. The measurement of the Higgs boson lifetime is derived from its flight distance in the CMS detector with an upper bound of tau(H) ˂ 1.9 x 10(-13) s at the 95% confidence level (C.L.), corresponding to a lower bound on the width of Gamma(H) ˃ 3.5 x 10(-9) MeV. The measurement of the width is obtained from an off-shell production technique, generalized to include anomalous couplings of the Higgs boson to two electroweak bosons. From this measurement, a joint constraint is set on the Higgs boson width and a parameter f(Lambda Q) that expresses an anomalous coupling contribution as an on-shell cross-section fraction. The limit on the Higgs boson width is Gamma(H) ˂ 46 MeV with f(Lambda Q) unconstrained and Gamma(H) ˂ 26 MeV for f(Lambda Q) = 0 at the 95% C.L. The constraint f(Lambda Q) ˂ 3.8 x 10(-3) at the 95% C.L. is obtained for the expected standard model Higgs boson width.
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