Observation of Medium-Induced Yield Enhancement and Acoplanarity Broadening of Low-pT Jets from Measurements in pp and Central Pb-Pb Collisions at √sNN=5.02 TeV

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F24%3A00602769" target="_blank" >RIV/61389005:_____/24:00602769 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/24:00602769

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevLett.133.022301" target="_blank" >https://doi.org/10.1103/PhysRevLett.133.022301</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevLett.133.022301" target="_blank" >10.1103/PhysRevLett.133.022301</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Observation of Medium-Induced Yield Enhancement and Acoplanarity Broadening of Low-pT Jets from Measurements in pp and Central Pb-Pb Collisions at √sNN=5.02 TeV

Popis výsledku v původním jazyce

The ALICE Collaboration reports the measurement of semi-inclusive distributions of charged-particle jets recoiling from a high transverse momentum (high p(T)) hadron trigger in proton-proton and central Pb-Pb collisions at root S-NN = 5.02 TeV. A data-driven statistical method is used to mitigate the large uncorrelated background in central Pb-Pb collisions. Recoil jet distributions are reported for jet resolution parameter R = 0.2, 0.4, and 0.5 in the range 7 < p(T, jet) < 140 GeV/c and trigger-recoil jet azimuthal separation pi/2 < Delta phi < pi. The measurements exhibit a marked medium-induced jet yield enhancement at low pT and at large azimuthal deviation from Delta phi similar to pi. The enhancement is characterized by its dependence on Delta phi, which has a slope that differs from zero by 4.7 sigma. Comparisons to model calculations incorporating different formulations of jet quenching are reported. These comparisons indicate that the observed yield enhancement arises from the response of the QGP medium to jet propagation.

Název v anglickém jazyce

Observation of Medium-Induced Yield Enhancement and Acoplanarity Broadening of Low-pT Jets from Measurements in pp and Central Pb-Pb Collisions at √sNN=5.02 TeV

Popis výsledku anglicky

The ALICE Collaboration reports the measurement of semi-inclusive distributions of charged-particle jets recoiling from a high transverse momentum (high p(T)) hadron trigger in proton-proton and central Pb-Pb collisions at root S-NN = 5.02 TeV. A data-driven statistical method is used to mitigate the large uncorrelated background in central Pb-Pb collisions. Recoil jet distributions are reported for jet resolution parameter R = 0.2, 0.4, and 0.5 in the range 7 < p(T, jet) < 140 GeV/c and trigger-recoil jet azimuthal separation pi/2 < Delta phi < pi. The measurements exhibit a marked medium-induced jet yield enhancement at low pT and at large azimuthal deviation from Delta phi similar to pi. The enhancement is characterized by its dependence on Delta phi, which has a slope that differs from zero by 4.7 sigma. Comparisons to model calculations incorporating different formulations of jet quenching are reported. These comparisons indicate that the observed yield enhancement arises from the response of the QGP medium to jet propagation.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10304 - Nuclear 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

Physical Review Letters

ISSN

0031-9007

e-ISSN

1079-7114

Svazek periodika

133

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

13

Strana od-do

022301

Kód UT WoS článku

001355884800002

EID výsledku v databázi Scopus

2-s2.0-85198282865