Search for Higgs boson decay to a charm quark-antiquark pair in proton-proton collisions at sqrt[s]=13 TeV.
File(s)
Published version
Author(s)
Type
Journal Article
Abstract
A search for the standard model Higgs boson decaying to a charm quark-antiquark pair, H → c¯c, produced in association with a leptonically decaying V (W or Z) boson is presented. The search is performed with proton-proton collisions at sqrt[s]=13 TeV collected by the CMS experiment, corresponding to an integrated luminosity of 138 fb−1. Novel charm jet identification and analysis methods using machine
learning techniques are employed. The analysis is validated by searching for Z → c¯c in VZ events, leading to its first observation at a hadron collider with a significance of 5.7 standard deviations. The observed (expected) upper limit on σðVHÞBðH → c¯cÞ is 0.94 (0.50þ0.22 −0.15 )pb at 95% confidence level (C.L.), corresponding to 14 (7.6þ3.4
−2.3 ) times the standard model prediction. For the Higgs-charm Yukawa coupling modifier, κc, the observed (expected) 95% C.L. interval is 1.1 < jκcj < 5.5 (jκcj < 3.4), the most stringent constraint to date.
learning techniques are employed. The analysis is validated by searching for Z → c¯c in VZ events, leading to its first observation at a hadron collider with a significance of 5.7 standard deviations. The observed (expected) upper limit on σðVHÞBðH → c¯cÞ is 0.94 (0.50þ0.22 −0.15 )pb at 95% confidence level (C.L.), corresponding to 14 (7.6þ3.4
−2.3 ) times the standard model prediction. For the Higgs-charm Yukawa coupling modifier, κc, the observed (expected) 95% C.L. interval is 1.1 < jκcj < 5.5 (jκcj < 3.4), the most stringent constraint to date.
Date Issued
2023-08-07
Date Acceptance
2022-07-07
Citation
Physical Review Letters, 2023, 131 (6)
ISSN
0031-9007
Publisher
American Physical Society (APS)
Journal / Book Title
Physical Review Letters
Volume
131
Issue
6
Copyright Statement
© 2023 CERN, for the CMS Collaboration. Published by the American Physical Society under the terms of
the Creative Commons Attribution 4.0 International license.
Further distribution of this work must maintain attribution to
the author(s) and the published article’s title, journal citation,
and DOI. Funded by SCOAP 3.
the Creative Commons Attribution 4.0 International license.
Further distribution of this work must maintain attribution to
the author(s) and the published article’s title, journal citation,
and DOI. Funded by SCOAP 3.
License URL
Identifier
https://doi.org/10.1103/physrevlett.131.061801
Publication Status
Published
Article Number
061801