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research article

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

Khachatryan, Vardan
•
Sirunyan, Albert M
•
Tumasyan, Armen
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October 22, 2015
Physical Review D [1970-2015]

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 this 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. 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.

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Type
research article
DOI
10.1103/PhysRevD.92.072010
ArXiv ID

1507.06656

Author(s)
Khachatryan, Vardan
Sirunyan, Albert M
Tumasyan, Armen
Adam, Wolfgang
Aşılar, Ece
Bergauer, Thomas
Brandstetter, Johannes
Brondolin, Erica
Dragicevic, Marko
Erö, Janos
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Date Issued

2015-10-22

Publisher

American Physical Society

Published in
Physical Review D [1970-2015]
Volume

92

Issue

7

Article Number

072010

Subjects

p p: scattering

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p p: colliding beams

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Higgs particle: width

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Higgs particle: lifetime

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Higgs particle: coupling

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coupling: anomaly

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Z0: pair production

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Z0: leptonic decay

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CMS

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electroweak interaction

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CERN LHC Coll

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off-shell

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experimental results

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Higgs particle --> 2Z0

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Z0 --> lepton+ lepton-

•

7000 GeV-cms8000 GeV-cms

Editorial or Peer reviewed

REVIEWED

Written at

OTHER

EPFL units
LPHE  
Available on Infoscience
February 17, 2020
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/165607
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