Search for a scalar or pseudoscalar dilepton resonance produced in association with a massive vector boson or top quark-antiquark pair in multilepton events at = 13 TeV

(CMS Collaboration) Tumasyan, Armen ; ... ; Giljanović, Duje ; Godinović, Nikola ; Lelas, Damir ; Puljak, Ivica ; Antunović, Željko ; Kovač, Marko ; Šćulac, Toni ; Bargassa, Pedrame ; Brigljević, Vuko ; Chitroda, Bhakti Kanulal ; Ferenček, Dinko ; Mishra, Saswat ; Roguljić, Matej ; Starodumov, Andrey ; Šuša, Tatjana ; ... ; Đurić, Senka ; ... ; Zhokin, Alexander (2024) Search for a scalar or pseudoscalar dilepton resonance produced in association with a massive vector boson or top quark-antiquark pair in multilepton events at = 13 TeV. Physical Review D - Particles, Fields, Gravitation and Cosmology, 110 (1). ISSN 2470-0010

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Abstract

A search for beyond the standard model spin-0 bosons, , that decay into pairs of electrons, muons, or tau leptons is presented. The search targets the associated production of such bosons with a W or Z gauge boson, or a top quark-antiquark pair, and uses events with three or four charged leptons, including hadronically decaying tau leptons. The proton-proton collision data set used in the analysis was collected at the LHC from 2016 to 2018 at a center-of-mass energy of 13 TeV, and corresponds to an integrated luminosity of 138 fb. The observations are consistent with the predictions from standard model processes. Upper limits are placed on the product of cross sections and branching fractions of such new particles over the mass range of 15 to 350 GeV with scalar, pseudoscalar, or Higgs-boson-like couplings, as well as on the product of coupling parameters and branching fractions. Several model-dependent exclusion limits are also presented. For a Higgs-boson-like model, limits are set on the mixing angle of the Higgs boson with the boson. For the associated production of a boson with a top quark-antiquark pair, limits are set on the coupling to top quarks. Finally, limits are set for the first time on a fermiophilic dilaton-like model with scalar couplings and a fermiophilic axion-like model with pseudoscalar couplings.

Item Type:	Article
Uncontrolled Keywords:	high energy physics ; experimental particle physics ; LHC ; CMS ; p p: colliding beams ; new physics: search for ; resonance: production ; resonance: scalar ; spin: resonance ; spin: 0 ; quark antiquark: pair ; coupling: scalar ; dilepton: resonance ; coupling: pseudoscalar ; vector boson: massive ; Higgs particle: mixing angle ; p p: scattering ; channel cross section: branching ratio: upper limit ; mass dependence ; vector boson: associated production ; top: pair production
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:	Martina Žugaj
Date Deposited:	08 Oct 2024 10:57
URI:	http://fulir.irb.hr/id/eprint/9135
DOI:	10.1103/PhysRevD.110.012013

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