Interpreting single jet measurements in Pb plus Pb collisions at the LHC

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10335382" target="_blank" >RIV/00216208:11320/16:10335382 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1140/epjc/s10052-016-3896-0" target="_blank" >http://dx.doi.org/10.1140/epjc/s10052-016-3896-0</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1140/epjc/s10052-016-3896-0" target="_blank" >10.1140/epjc/s10052-016-3896-0</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Interpreting single jet measurements in Pb plus Pb collisions at the LHC

Popis výsledku v původním jazyce

Results are presented from a phenomenological analysis of recent measurements of jet suppression and modifications of jet fragmentation functions in Pb+Pb collisions at the LHC. Particular emphasis is placed on the impact of the differences between quark and gluon jet quenching on the transverse momentum (p(T)(jet)) dependence of the jet R-AA and on the fragmentation functions, D(z). Primordial quark and gluon parton distributions were obtained from PYTHIA8 and were parameterized using simple power-law functions and extensions to the power-law function which were found to better describe the PYTHIA8 parton spectra. Asimple model for the quark energy loss based on the shift formalism is used to model R-AA and D(z) using both analytic results and using direct Monte-Carlo sampling of the PYTHIA parton spectra. The model is capable of describing the full p(T)(jet), rapidity, and centrality dependence of the measured jet R-AA using three effective parameters. A key result from the analysis is that the D(z) modifications observed in the data, excluding the enhancement at low-z, may result primarily from the different quenching of the quarks and gluons. The model is also capable of reproducing the charged hadron R-AA at high transverse momentum. Predictions are made for the jet R-AA at large rapidities where it has not yet been measured and for the rapidity dependence of D(z).

Název v anglickém jazyce

Interpreting single jet measurements in Pb plus Pb collisions at the LHC

Popis výsledku anglicky

Results are presented from a phenomenological analysis of recent measurements of jet suppression and modifications of jet fragmentation functions in Pb+Pb collisions at the LHC. Particular emphasis is placed on the impact of the differences between quark and gluon jet quenching on the transverse momentum (p(T)(jet)) dependence of the jet R-AA and on the fragmentation functions, D(z). Primordial quark and gluon parton distributions were obtained from PYTHIA8 and were parameterized using simple power-law functions and extensions to the power-law function which were found to better describe the PYTHIA8 parton spectra. Asimple model for the quark energy loss based on the shift formalism is used to model R-AA and D(z) using both analytic results and using direct Monte-Carlo sampling of the PYTHIA parton spectra. The model is capable of describing the full p(T)(jet), rapidity, and centrality dependence of the measured jet R-AA using three effective parameters. A key result from the analysis is that the D(z) modifications observed in the data, excluding the enhancement at low-z, may result primarily from the different quenching of the quarks and gluons. The model is also capable of reproducing the charged hadron R-AA at high transverse momentum. Predictions are made for the jet R-AA at large rapidities where it has not yet been measured and for the rapidity dependence of D(z).

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BF - Elementární částice a fyzika vysokých energií

OECD FORD obor

—

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

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

—

Svazek periodika

76

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

19

Strana od-do

—

Kód UT WoS článku

000369010200005

EID výsledku v databázi Scopus

2-s2.0-84955580923