Limits on the Higgs boson lifetime and width from its decay to four charged leptons
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PhysRevD.92.072010.pdf
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Author(s)
Apyan, Aram
Barbieri, Richard Alexander
Baty, Austin Alan
Bierwagen, Katharina
Brandt, Stephanie Akemi
Busza, Wit
Cali, Ivan Amos
Demiragli, Zeynep
Di Matteo, Leonardo
Gomez-Ceballos, Guillelmo
Date Issued
October 2015
Journal
Physical Review D
Publisher
American Physical Society
Citation
Khachatryan, V., A. M. Sirunyan, A. Tumasyan, W. Adam, E. Asilar, T. Bergauer, J. Brandstetter, et al. “Limits on the Higgs Boson Lifetime and Width from Its Decay to Four Charged Leptons.” Phys. Rev. D 92, no. 7 (October 2015). © 2015 CERN, for the CMS
Version
Final published version
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[superscript −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 τ[subscript H] < 1.9 × 10[superscript −13] s at the 95% confidence level (C.L.), corresponding to a lower bound on the width of Γ[subscript H] > 3.5 × 10[superscript −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[subscript ΛQ] that expresses an anomalous coupling contribution as an on-shell cross-section fraction. The limit on the Higgs boson width is Γ[subscript H] < 46 MeV with f[subscript ΛQ] unconstrained and Γ[subscript H] < 26 MeV for f[subscript ΛQ] = 0 at the 95% C.L. The constraint f[subscript ΛQ] < 3.8 × 10[superscript −3] at the 95% C.L. is obtained for the expected standard model Higgs boson width.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Massachusetts Institute of Technology. School of Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.92.072010
