Search for ZZ and ZH production in the bb¯bb¯ final state using 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 ZZ and ZH production in the bb¯bb¯ final state using proton-proton collisions at √s=13 TeV. European Physical Journal C: Particles and Fields, 84 (7). ISSN 1434-6044

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Abstract

A search for ZZ and ZH production in the bb¯bb¯ final state is presented, where H is the standard model (SM) Higgs boson. The search uses an event sample of proton-proton collisions corresponding to an integrated luminosity of 133fb-1 collected at a center-of-mass energy of 13TeV with the CMS detector at the CERN LHC. The analysis introduces several novel techniques for deriving and validating a multi-dimensional background model based on control samples in data. A multiclass multivariate classifier customized for the bb¯bb¯ final state is developed to derive the background model and extract the signal. The data are found to be consistent, within uncertainties, with the SM predictions. The observed (expected) upper limits at 95% confidence level are found to be 3.8 (3.8) and 5.0 (2.9) times the SM prediction for the ZZ and ZH production cross sections, respectively.

Item Type:	Article
Uncontrolled Keywords:	High energy physics; Experimental particle physics; LHC; CMS; p p: scattering; p p: colliding beams; background: model; Z0: pair production; Higgs particle: associated production; Z0: hadronic decay; Higgs particle: hadronic decay; bottom: pair production; bottom: particle identification; final state: ((n)jet); jet: bottom; CERN Lab; higher-dimensional; CERN LHC Coll; channel cross section: upper limit; data analysis method; experimental results; 13000 GeV-cms
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 08:05
URI:	http://fulir.irb.hr/id/eprint/9127
DOI:	10.1140/epjc/s10052-024-13021-z

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