Measurement of the production cross section of a Higgs boson with large transverse momentum in its decays to a pair of τ leptons 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; Mishra, Saswat; Starodumov, Andrey; Šuša, Tatjana; ... ; Roguljić, Matej; ...; Zhokin, Alexander (2024) Measurement of the production cross section of a Higgs boson with large transverse momentum in its decays to a pair of τ leptons in proton-proton collisions at s√ = 13 TeV. Physics Letters B, 857 . ISSN 0370-2693

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Abstract

A measurement of the production cross section of a Higgs boson with transverse momentum greater than 250 GeV is presented where the Higgs boson decays to a pair of τ leptons. It is based on proton-proton collision data collected by the CMS experiment at the CERN LHC at a center-of-mass energy of 13 TeV. The data sample corresponds to an integrated luminosity of 138 fb−1. Because of the large transverse momentum of the Higgs boson the τ leptons from its decays are boosted and produced spatially close, with their decay products overlapping. Therefore, a dedicated algorithm was developed to reconstruct and identify them. The observed (expected) significance of the measured signal with respect to the standard model background-only hypothesis is 3.5 (2.2) standard deviations. The product of the production cross section and branching fraction is measured to be 1.64−0.54+0.68 times the standard model expectation. The fiducial differential production cross section is also measured as functions of the Higgs boson and leading jet transverse momenta. This measurement extends the probed large-transverse-momentum region in the ττ final state beyond 600 GeV.

Item Type:	Article
Uncontrolled Keywords:	High energy physics; Experimental particle physics; LHC; CMS; Higgs boson; Tau lepton; p p: scattering; p p: colliding beams; jet: transverse momentum; Higgs particle: transverse momentum; transverse momentum: high; Higgs particle: leptonic decay; tau: pair production; tau: particle identification; boosted particle; CERN Lab; CERN LHC Coll; channel cross section: branching ratio: measured; differential cross section: measured; transverse momentum dependence
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 07:27
URI:	http://fulir.irb.hr/id/eprint/9126
DOI:	10.1016/j.physletb.2024.138964

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