Search for a new resonance decaying into two spin-0 bosons in a final state with two photons and two bottom quarks in proton-proton collisions at s√ = 13 TeV

(CMS Collaboration) Tumasyan, Armen ; ... ; Giljanović, Duje ; Godinović, Nikola ; Lelas, Damir ; Puljak, Ivica ; Antunović, Željko ; Kovač, Marko ; Šćulac, Toni ; Brigljević, Vuko ; Chitroda, Bhakti Kanulal ; Ferenček, Dinko ; Majumder, Devdatta ; Mishra, Saswat ; Roguljić, Matej ; Starodumov, Andrey ; Šuša, Tatjana ; ... ; Bargassa, Pedrame ; ... ; Đurić, Senka ; ... ; Zhokin, Alexander (2024) Search for a new resonance decaying into two spin-0 bosons in a final state with two photons and two bottom quarks in proton-proton collisions at s√ = 13 TeV. Journal of High Energy Physics, 2024 (05). ISSN 1126-6708

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Abstract

A search for a new boson X is presented using CERN LHC proton-proton collision data collected by the CMS experiment at s√ = 13 TeV in 2016-2018, and corresponding to an integrated luminosity of 138 fb−1. The resonance X decays into either a pair of Higgs bosons HH of mass 125 GeV or an H and a new spin-0 boson Y. One H subsequently decays to a pair of photons, and the second H or Y, to a pair of bottom quarks. The explored mass ranges of X are 260-1000 GeV and 300-1000 GeV, for decays to HH and to HY, respectively, with the Y mass range being 90-800 GeV. For a spin-0 X hypothesis, the 95% confidence level upper limit on the product of its production cross section and decay branching fraction is observed to be within 0.90-0.04 fb, depending on the masses of X and Y. The largest deviation from the background-only hypothesis with a local (global) significance of 3.8 (below 2.8) standard deviations is observed for X and Y masses of 650 and 90 GeV, respectively. The limits are interpreted using several models of new physics.

Item Type:	Article
Uncontrolled Keywords:	high energy physics; experimental particle physics; LHC; CMS; B physics; hadron-hadron scattering; higgs physics; photon production; p p: scattering; p p: colliding beams; resonance: production; resonance: decay modes; boson: scalar; boson: pair production; boson: decay modes; bottom: pair production; bottom: 2; photon: pair production; new physics: search for; channel cross section: branching ratio: upper limit; mass dependence; resonance: mass; two-photon; CERN Lab
Subjects:	NATURAL SCIENCES NATURAL SCIENCES > Physics NATURAL SCIENCES > Physics > Physics of Elementary Particles and Fields
Divisions:	Centre for detectors, sensors and electronics Division of Experimental Physics
Depositing User:	Diana Mikoč Radešić
Date Deposited:	08 Oct 2024 09:58
URI:	http://fulir.irb.hr/id/eprint/9131
DOI:	10.1007/JHEP05(2024)316

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