Search for the decay of the Higgs boson to a pair of light pseudoscalar bosons in the final state with four bottom quarks in proton-proton collisions at s√ = 13 TeV

(CMS Collaboration) Hayrapetyan, Aram; ... ; Giljanović, Duje; Godinović, Nikola; Lelas, Damir; Šćulac, Ana; Kovač, Marko; Šćulac, Toni; Bargassa, Pedrame; Brigljević, Vuko; Chitroda, Bhakti Kanulal; Ferenček, Dinko; Jakovčić, Krešimir; Mishra, Saswat; Starodumov, Andrey; Šuša, Tatjana; ...; Roguljić, Matej; ...; Zhokin, Alexander (2024) Search for the decay of the Higgs boson to a pair of light pseudoscalar bosons in the final state with four bottom quarks in proton-proton collisions at s√ = 13 TeV. Journal of High Energy Physics, 06 . ISSN 1126-6708

	PDF - Published Version - article Available under License Creative Commons Attribution. Download (1MB)
	PDF - Submitted Version - article Available under License Creative Commons Attribution. Download (1MB)

Abstract

A search is presented for the decay of the 125 GeV Higgs boson (H) to a pair of new light pseudoscalar bosons (a), followed by the prompt decay of each a boson to a bottom quark-antiquark pair, H→aa→bb¯bb¯. The analysis is performed using a data sample of proton-proton collisions collected with the CMS detector at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 138 fb−1. To reduce the background from standard model processes, the search requires the Higgs boson to be produced in association with a leptonically decaying W or Z boson. The analysis probes the production of new light bosons in a 15 < ma < 60 GeV mass range. Assuming the standard model predictions for the Higgs boson production cross sections for pp → WH and ZH, model independent upper limits at 95% confidence level are derived for the branching fraction B(H→aa→bb¯bb¯). The combined WH and ZH observed upper limit on the branching fraction ranges from 1.10 for ma = 20 GeV to 0.36 for ma = 60 GeV, complementing other measurements in the μμττ, ττττ and bbℓℓ (ℓ = μ, τ) channels.

Item Type:	Article
Uncontrolled Keywords:	High energy physics; Experimental particle physics; LHC; CMS; Beyond Standard Model; Hadron-Hadron Scattering; Supersymmetry; p p: scattering; p p: colliding beams; vector boson: associated production; W: leptonic decay; Z0: leptonic decay; Higgs particle: associated production; quark antiquark: pair; Higgs particle: decay modes; pseudoscalar particle: pair production; Higgs particle: branching ratio: upper limit; pseudoscalar particle: hadronic decay
Subjects:	NATURAL SCIENCES NATURAL SCIENCES > Physics NATURAL SCIENCES > Physics > Physics of Elementary Particles and Fields
Divisions:	Division of Experimental Physics Centre for detectors, sensors and electronics
Depositing User:	Virna Brumnić
Date Deposited:	08 Oct 2024 06:54
URI:	http://fulir.irb.hr/id/eprint/9123
DOI:	10.1007/JHEP06(2024)097

Actions (login required)

View Item