Exploration of jet substructure using iterative declustering in pp and Pb-Pb collisions at LHC energies

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F20%3A00523800" target="_blank" >RIV/61389005:_____/20:00523800 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/20:00523800 RIV/68407700:21340/20:00342815

Výsledek na webu

<a href="https://doi.org/10.1016/j.physletb.2020.135227" target="_blank" >https://doi.org/10.1016/j.physletb.2020.135227</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2020.135227" target="_blank" >10.1016/j.physletb.2020.135227</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Exploration of jet substructure using iterative declustering in pp and Pb-Pb collisions at LHC energies

Popis výsledku v původním jazyce

The ALICE collaboration at the CERN LHC reports novel measurements of jet substructure in pp collisions at root s = 7 TeV and central Pb-Pb collisions at root s(NN) = 2.76 TeV. Jet substructure of track-based jets is explored via iterative declustering and grooming techniques. We present the measurement of the momentum sharing of two-prong substructure exposed via grooming, the z(g), and its dependence on the opening angle, in both pp and Pb-Pb collisions. We also present the measurement of the distribution of the number of branches obtained in the iterative declustering of the jet, which is interpreted as the number of its hard splittings. In Pb-Pb collisions, we observe a suppression of symmetric splittings at large opening angles and an enhancement of splittings at small opening angles relative to pp collisions, with no significant modification of the number of splittings. The results are compared to predictions from various Monte Carlo event generators to test the role of important concepts in the evolution of the jet in the medium such as colour coherence.

Název v anglickém jazyce

Exploration of jet substructure using iterative declustering in pp and Pb-Pb collisions at LHC energies

Popis výsledku anglicky

The ALICE collaboration at the CERN LHC reports novel measurements of jet substructure in pp collisions at root s = 7 TeV and central Pb-Pb collisions at root s(NN) = 2.76 TeV. Jet substructure of track-based jets is explored via iterative declustering and grooming techniques. We present the measurement of the momentum sharing of two-prong substructure exposed via grooming, the z(g), and its dependence on the opening angle, in both pp and Pb-Pb collisions. We also present the measurement of the distribution of the number of branches obtained in the iterative declustering of the jet, which is interpreted as the number of its hard splittings. In Pb-Pb collisions, we observe a suppression of symmetric splittings at large opening angles and an enhancement of splittings at small opening angles relative to pp collisions, with no significant modification of the number of splittings. The results are compared to predictions from various Monte Carlo event generators to test the role of important concepts in the evolution of the jet in the medium such as colour coherence.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10304 - Nuclear physics

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physics Letters. B

ISSN

0370-2693

e-ISSN

—

Svazek periodika

802

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

12

Strana od-do

135227

Kód UT WoS článku

000515091400026

EID výsledku v databázi Scopus

2-s2.0-85078992203