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Title: Limits on the Higgs boson lifetime and width from its decay to four charged leptons

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 τ H < 1.9 × 10 -13 s at the 95% confidence level (C.L.), corresponding to a lower bound on the width of Γ H > 3.5 × 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 our measurement, a joint constraint is set on the Higgs boson width and a parameter f ΛQ that expresses an anomalous coupling contribution as an on-shell cross-section fraction. Additionally, the limit on the Higgs boson width is Γ H<46 MeV with f ΛQ unconstrained and Γ H < 26 MeV for f ΛQ = 0 at the 95% C.L. The constraint f ΛQ < 3.8 × 10 -3 at themore » 95% C.L. is obtained for the expected standard model Higgs boson width.« less

Authors:
 [1]
  1. Yerevan Physics Inst. (YerPhI), Yerevan (Armenia). et al.
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
CMS Collaboration
OSTI Identifier:
1224660
Alternate Identifier(s):
OSTI ID: 1221318
Report Number(s):
FERMILAB-PUB-15-328-CMS; CERN-PH-EP-2015-159; CMS-HIG-14-036
Journal ID: ISSN 1550-7998; arXiv eprint number arXiv:1507.06656; TRN: US1600881
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Published Article
Journal Name:
Physical Review. D, Particles, Fields, Gravitation and Cosmology
Additional Journal Information:
Journal Volume: 92; Journal Issue: 7; Journal ID: ISSN 1550-7998
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Khachatryan, Vardan. Limits on the Higgs boson lifetime and width from its decay to four charged leptons. United States: N. p., 2015. Web. doi:10.1103/PhysRevD.92.072010.
Khachatryan, Vardan. Limits on the Higgs boson lifetime and width from its decay to four charged leptons. United States. doi:10.1103/PhysRevD.92.072010.
Khachatryan, Vardan. Thu . "Limits on the Higgs boson lifetime and width from its decay to four charged leptons". United States. doi:10.1103/PhysRevD.92.072010.
@article{osti_1224660,
title = {Limits on the Higgs boson lifetime and width from its decay to four charged leptons},
author = {Khachatryan, Vardan},
abstractNote = {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 τH < 1.9 × 10-13 s at the 95% confidence level (C.L.), corresponding to a lower bound on the width of ΓH > 3.5 × 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 our measurement, a joint constraint is set on the Higgs boson width and a parameter fΛQ that expresses an anomalous coupling contribution as an on-shell cross-section fraction. Additionally, the limit on the Higgs boson width is ΓH<46 MeV with fΛQ unconstrained and ΓH < 26 MeV for fΛQ = 0 at the 95% C.L. The constraint fΛQ < 3.8 × 10-3 at the 95% C.L. is obtained for the expected standard model Higgs boson width.},
doi = {10.1103/PhysRevD.92.072010},
journal = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},
number = 7,
volume = 92,
place = {United States},
year = {2015},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevD.92.072010

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Cited by: 8 works
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