Measurements of jet quenching with semi-inclusive hadron plus jet distributions in Au plus Au collisions at root s(NN)=200 GeV

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F17%3A00477479" target="_blank" >RIV/61389005:_____/17:00477479 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21340/17:00318439

Výsledek na webu

<a href="http://dx.doi.org/10.1103/PhysRevC.96.024905" target="_blank" >http://dx.doi.org/10.1103/PhysRevC.96.024905</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevC.96.024905" target="_blank" >10.1103/PhysRevC.96.024905</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Measurements of jet quenching with semi-inclusive hadron plus jet distributions in Au plus Au collisions at root s(NN)=200 GeV

Popis výsledku v původním jazyce

The STAR Collaboration reports the measurement of semi-inclusive distributions of charged-particle jets recoiling from a high transverse momentum hadron trigger, in central and peripheral Au + Au collisions at root s(NN) = 200 GeV. Charged jets are reconstructed with the anti-kT algorithm for jet radii R between 0.2 and 0.5 and with low infrared cutoff of track constituents (p(T) > 0.2 GeV/c). A novel mixed-event technique is used to correct the large uncorrelated background present in heavy ion collisions. Corrected recoil jet distributions are reported at midrapidity, for charged-jet transverse momentum p(T,jet)(ch) < 30 GeV/c. Comparison is made to similar measurements for Pb + Pb collisions at root s = 2.76 TeV, to calculations for p + p collisions at root s = 200 GeV based on the PYTHIA Monte Carlo generator and on a next-to-leading order perturbative QCD approach, and to theoretical calculations incorporating jet quenching. The recoil jet yield is suppressed in central relative to peripheral collisions, with the magnitude of the suppression corresponding to medium-induced charged energy transport out of the jet cone of 2.8 +/- 0.2(stat) +/- 1.5(sys) GeV/c, for 10 < p(T,jet)(ch) < 20 GeV/c and R = 0.5. No medium-induced change in jet shape is observed for R < 0.5. The azimuthal distribution of low-p(T,jet)(ch) recoil jets may be enhanced at large azimuthal angles to the trigger axis, due to scattering off quasiparticles in the hot QCD medium. Measurement of this distribution gives a 90% statistical confidence upper limit to the yield enhancement at large deflection angles in central Au + Au collisions of 50 +/- 30( sys)% of the large-angle yield in p + p collisions predicted by PYTHIA.

Název v anglickém jazyce

Measurements of jet quenching with semi-inclusive hadron plus jet distributions in Au plus Au collisions at root s(NN)=200 GeV

Popis výsledku anglicky

The STAR Collaboration reports the measurement of semi-inclusive distributions of charged-particle jets recoiling from a high transverse momentum hadron trigger, in central and peripheral Au + Au collisions at root s(NN) = 200 GeV. Charged jets are reconstructed with the anti-kT algorithm for jet radii R between 0.2 and 0.5 and with low infrared cutoff of track constituents (p(T) > 0.2 GeV/c). A novel mixed-event technique is used to correct the large uncorrelated background present in heavy ion collisions. Corrected recoil jet distributions are reported at midrapidity, for charged-jet transverse momentum p(T,jet)(ch) < 30 GeV/c. Comparison is made to similar measurements for Pb + Pb collisions at root s = 2.76 TeV, to calculations for p + p collisions at root s = 200 GeV based on the PYTHIA Monte Carlo generator and on a next-to-leading order perturbative QCD approach, and to theoretical calculations incorporating jet quenching. The recoil jet yield is suppressed in central relative to peripheral collisions, with the magnitude of the suppression corresponding to medium-induced charged energy transport out of the jet cone of 2.8 +/- 0.2(stat) +/- 1.5(sys) GeV/c, for 10 < p(T,jet)(ch) < 20 GeV/c and R = 0.5. No medium-induced change in jet shape is observed for R < 0.5. The azimuthal distribution of low-p(T,jet)(ch) recoil jets may be enhanced at large azimuthal angles to the trigger axis, due to scattering off quasiparticles in the hot QCD medium. Measurement of this distribution gives a 90% statistical confidence upper limit to the yield enhancement at large deflection angles in central Au + Au collisions of 50 +/- 30( sys)% of the large-angle yield in p + p collisions predicted by PYTHIA.

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

2017

Kód důvěrnosti údajů

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

Název periodika

Physical Review C

ISSN

2469-9985

e-ISSN

—

Svazek periodika

96

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

25

Strana od-do

—

Kód UT WoS článku

000407551700003

EID výsledku v databázi Scopus

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