Measurement of the primary Lund jet plane density in proton-proton collisions at = 13 TeV

Hayrapetyan, A.; ..., ...; 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; ..., ...; Zhokin, Alexander (2024) Measurement of the primary Lund jet plane density in proton-proton collisions at = 13 TeV. The Journal of high energy physics, 05 . ISSN 1126-6708

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Abstract

A measurement is presented of the primary Lund jet plane (LJP) density in inclusive jet production in proton-proton collisions. The analysis uses 138 fb of data collected by the CMS experiment at = 13 TeV. The LJP, a representation of the phase space of emissions inside jets, is constructed using iterative jet declustering. The transverse momentum and the splitting angle of an emission relative to its emitter are measured at each step of the jet declustering process. The average density of emissions as function of GeV) and is measured for jets with distance parameters = 0.4 or 0.8, transverse momentum 700 GeV, and rapidity 1.7. The jet substructure is measured using the charged-particle tracks of the jet. The measured distributions, unfolded to the level of stable particles, are compared with theoretical predictions from simulations and with perturbative quantum chromodynamics calculations. Due to the ability of the LJP to factorize physical effects, these measurements can be used to improve different aspects of the physics modeling in event generators.

Item Type:	Article
Uncontrolled Keywords:	High energy physics ; Experimental particle physics ; LHC ; CMS ; Hadron-Hadron Scattering ; Jet Substructure and Boosted Jets ; Jets ; p p: scattering ; p p: colliding beams ; jet: hadroproduction ; particle: stability ; charged particle: tracks ; density ; jet: transverse momentum ; numerical calculations: Monte Carlo ; quantum chromodynamics: perturbation theory ; CERN LHC Coll ; splitting ; jet: rapidity ; phase space ; structure ; shape analysis: jet ; event shape analysis
Subjects:	NATURAL SCIENCES > Physics
Divisions:	Division of Experimental Physics
Depositing User:	Vuko Brigljević
Date Deposited:	11 Oct 2024 14:46
URI:	http://fulir.irb.hr/id/eprint/9160
DOI:	10.1007/JHEP05(2024)116

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