Multiplicity dependence of charged-particle jet production in pp collisions at √s = 13 TeV

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F22%3A00558716" target="_blank" >RIV/68378271:_____/22:00558716 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61389005:_____/22:00558716

Výsledek na webu

<a href="https://doi.org/10.1140/epjc/s10052-022-10405-x" target="_blank" >https://doi.org/10.1140/epjc/s10052-022-10405-x</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1140/epjc/s10052-022-10405-x" target="_blank" >10.1140/epjc/s10052-022-10405-x</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Multiplicity dependence of charged-particle jet production in pp collisions at √s = 13 TeV

Popis výsledku v původním jazyce

The multiplicity dependence of jet production in pp collisions at the centre-of-mass energy of root s = 13 TeV is studied for the first time. Jets are reconstructed from charged particles using the anti-k(T) algorithm with resolution parameters R varying from 0.2 to 0.7. The jets are measured in the pseudorapidity range vertical bar eta(jet)vertical bar < 0.9 - R and in the transverse momentum range 5 < P-T,jet(ch) < 140 GeV/c. The multiplicity intervals are categorised by the ALICE forward detector V0. The p(T )differential cross section of charged-particle jets are compared to leading order (LO) and next-to-leading order (NLO) perturbative quantum chromodynamics (pQCD) calculations. It is found that the data are better described by the NLO calculation, although the NLO prediction overestimates the jet cross section below 20 GeV/c. The cross section ratios for different R are also measured and compared to model calculations. These measurements provide insights into the angular dependence of jet fragmentation. The jet yield increases with increasing self-normalised charged-particle multiplicity. This increase shows only a weak dependence on jet transverse momentum and resolution parameter at the highest multiplicity. While such behaviour is qualitatively described by the present version of PYTHIA, quantitative description may require implementing new mechanisms for multi-particle production in hadronic collisions.

Název v anglickém jazyce

Multiplicity dependence of charged-particle jet production in pp collisions at √s = 13 TeV

Popis výsledku anglicky

The multiplicity dependence of jet production in pp collisions at the centre-of-mass energy of root s = 13 TeV is studied for the first time. Jets are reconstructed from charged particles using the anti-k(T) algorithm with resolution parameters R varying from 0.2 to 0.7. The jets are measured in the pseudorapidity range vertical bar eta(jet)vertical bar < 0.9 - R and in the transverse momentum range 5 < P-T,jet(ch) < 140 GeV/c. The multiplicity intervals are categorised by the ALICE forward detector V0. The p(T )differential cross section of charged-particle jets are compared to leading order (LO) and next-to-leading order (NLO) perturbative quantum chromodynamics (pQCD) calculations. It is found that the data are better described by the NLO calculation, although the NLO prediction overestimates the jet cross section below 20 GeV/c. The cross section ratios for different R are also measured and compared to model calculations. These measurements provide insights into the angular dependence of jet fragmentation. The jet yield increases with increasing self-normalised charged-particle multiplicity. This increase shows only a weak dependence on jet transverse momentum and resolution parameter at the highest multiplicity. While such behaviour is qualitatively described by the present version of PYTHIA, quantitative description may require implementing new mechanisms for multi-particle production in hadronic collisions.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

<a href="/cs/project/LTT17018" target="_blank" >LTT17018: Získávání nových poznatků o mikrosvětě v infrastruktuře CERN</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

European Physical Journal C

ISSN

1434-6044

e-ISSN

1434-6052

Svazek periodika

82

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

30

Strana od-do

514

Kód UT WoS článku

000807521100001

EID výsledku v databázi Scopus

2-s2.0-85134078179