Search for nonresonant Higgs boson pair production in final states with two bottom quarks and two photons in proton-proton collisions at s $$ \sqrt{s} $$ = 13 TeV
Name
13130_2021_Article_15213.pdf
Size
1.58 MB
Format
Adobe PDF
Checksum (MD5)
6be9cb01fb5b735239122e91a40c1fa9
Author(s)
Sirunyan, A. M
Tumasyan, A.
Adam, W.
Bergauer, T.
Dragicevic, M.
Escalante Del Valle, A.
Frühwirth, R.
Jeitler, M.
Krammer, N.
Lechner, L.
Date Issued
March 29, 2021
Publisher
Springer Berlin Heidelberg
Citation
Journal of High Energy Physics. 2021 Mar 29;2021(3):257
Version
Final published version
Abstract
Abstract
A search for nonresonant production of Higgs boson pairs via gluon-gluon and vector boson fusion processes in final states with two bottom quarks and two photons is presented. The search uses data from proton-proton collisions at a center-of-mass energy of
s
$$ \sqrt{s} $$
= 13 TeV recorded with the CMS detector at the LHC, corresponding to an integrated luminosity of 137 fb−1. No significant deviation from the background-only hypothesis is observed. An upper limit at 95% confidence level is set on the product of the Higgs boson pair production cross section and branching fraction into
γγ
b
b
¯
$$ \gamma \gamma \mathrm{b}\overline{\mathrm{b}} $$
. The observed (expected) upper limit is determined to be 0.67 (0.45) fb, which corresponds to 7.7 (5.2) times the standard model prediction. This search has the highest sensitivity to Higgs boson pair production to date. Assuming all other Higgs boson couplings are equal to their values in the standard model, the observed coupling modifiers of the trilinear Higgs boson self-coupling κλ and the coupling between a pair of Higgs bosons and a pair of vector bosons c2V are constrained within the ranges −3.3 < κλ < 8.5 and −1.3 < c2V < 3.5 at 95% confidence level. Constraints on κλ are also set by combining this analysis with a search for single Higgs bosons decaying to two photons, produced in association with top quark-antiquark pairs, and by performing a simultaneous fit of κλ and the top quark Yukawa coupling modifier κt.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1007/JHEP03(2021)257
