Search for jet quenching effects in high-multiplicity pp collisions at √s=13 TeV via di-jet acoplanarity

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F24%3A00599579" target="_blank" >RIV/68378271:_____/24:00599579 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61389005:_____/24:00599579

Výsledek na webu

<a href="https://doi.org/10.1007/JHEP05(2024)229" target="_blank" >https://doi.org/10.1007/JHEP05(2024)229</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/JHEP05(2024)229" target="_blank" >10.1007/JHEP05(2024)229</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Search for jet quenching effects in high-multiplicity pp collisions at √s=13 TeV via di-jet acoplanarity

Popis výsledku v původním jazyce

The ALICE Collaboration reports a search for jet quenching effects in highmultiplicity (HM) proton-proton collisions at root s = 13TeV, using the semi-inclusive azimuthaldifference distribution Delta phi of charged-particle jets recoiling from a high transverse momentum (high- pT,trig) trigger hadron. Jet quenching may broaden the Delta phi distribution measured in HM events compared to that in minimum bias (MB) events. The measurement employs a pT,trig-differential observable for data-driven suppression of the contribution of multiple partonic interactions, which is the dominant background. While azimuthal broadening is indeed observed in HM compared to MB events, similar broadening for HM events is observed for simulations based on the PYTHIA 8 Monte Carlo generator, which does not incorporate jet quenching. Detailed analysis of these data and simulations show that the azimuthal broadening is due to bias of the HM selection towards events with multiple jets in the final state. The identification of this bias has implications for all jet quenching searches where selection is made on the event activity.

Název v anglickém jazyce

Search for jet quenching effects in high-multiplicity pp collisions at √s=13 TeV via di-jet acoplanarity

Popis výsledku anglicky

The ALICE Collaboration reports a search for jet quenching effects in highmultiplicity (HM) proton-proton collisions at root s = 13TeV, using the semi-inclusive azimuthaldifference distribution Delta phi of charged-particle jets recoiling from a high transverse momentum (high- pT,trig) trigger hadron. Jet quenching may broaden the Delta phi distribution measured in HM events compared to that in minimum bias (MB) events. The measurement employs a pT,trig-differential observable for data-driven suppression of the contribution of multiple partonic interactions, which is the dominant background. While azimuthal broadening is indeed observed in HM compared to MB events, similar broadening for HM events is observed for simulations based on the PYTHIA 8 Monte Carlo generator, which does not incorporate jet quenching. Detailed analysis of these data and simulations show that the azimuthal broadening is due to bias of the HM selection towards events with multiple jets in the final state. The identification of this bias has implications for all jet quenching searches where selection is made on the event activity.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Journal of High Energy Physics

ISSN

1029-8479

e-ISSN

1029-8479

Svazek periodika

2024

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

32

Strana od-do

229

Kód UT WoS článku

001261500300001

EID výsledku v databázi Scopus

2-s2.0-85203806494