Z-boson production in p-Pb collisions at root s (NN)=8.16 TeV and Pb-Pb collisions at root s (NN)=5.02 TeV

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F20%3A00533933" target="_blank" >RIV/61389005:_____/20:00533933 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/20:00533933

Výsledek na webu

<a href="https://doi.org/10.1007/JHEP09(2020)076" target="_blank" >https://doi.org/10.1007/JHEP09(2020)076</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/JHEP09(2020)076" target="_blank" >10.1007/JHEP09(2020)076</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Z-boson production in p-Pb collisions at root s (NN)=8.16 TeV and Pb-Pb collisions at root s (NN)=5.02 TeV

Popis výsledku v původním jazyce

Measurement of Z-boson production in p-Pb collisions at 8.16 TeV and Pb-Pb collisions at = 5.02 TeV is reported. It is performed in the dimuon decay channel, through the detection of muons with pseudorapidity -4 < <eta>(mu)< -2.5 and transverse momentum pT<mu>> 20 GeV/c in the laboratory frame. The invariant yield and nuclear modification factor are measured for opposite-sign dimuons with invariant mass 60 < m(<mu>mu)< 120 GeV/c(2) and rapidity 2.5 <ycms mu mu< 4. They are presented as a function of rapidity and, for the Pb-Pb collisions, of centrality as well. The results are compared with theoretical calculations, both with and without nuclear modifications to the Parton Distribution Functions (PDFs). In p-Pb collisions the center-of-mass frame is boosted with respect to the laboratory frame, and the measurements cover the backward (-4.46 <ycms mu mu< -2.96) and forward (2.03 <ycms mu mu< 3.53) rapidity regions. For the p-Pb collisions, the results are consistent within experimental and theoretical uncertainties with calculations that include both free-nucleon and nuclear-modified PDFs. For the Pb-Pb collisions, a 3.4<sigma> deviation is seen in the integrated yield between the data and calculations based on the free-nucleon PDFs, while good agreement is found once nuclear modifications are considered.

Název v anglickém jazyce

Z-boson production in p-Pb collisions at root s (NN)=8.16 TeV and Pb-Pb collisions at root s (NN)=5.02 TeV

Popis výsledku anglicky

Measurement of Z-boson production in p-Pb collisions at 8.16 TeV and Pb-Pb collisions at = 5.02 TeV is reported. It is performed in the dimuon decay channel, through the detection of muons with pseudorapidity -4 < <eta>(mu)< -2.5 and transverse momentum pT<mu>> 20 GeV/c in the laboratory frame. The invariant yield and nuclear modification factor are measured for opposite-sign dimuons with invariant mass 60 < m(<mu>mu)< 120 GeV/c(2) and rapidity 2.5 <ycms mu mu< 4. They are presented as a function of rapidity and, for the Pb-Pb collisions, of centrality as well. The results are compared with theoretical calculations, both with and without nuclear modifications to the Parton Distribution Functions (PDFs). In p-Pb collisions the center-of-mass frame is boosted with respect to the laboratory frame, and the measurements cover the backward (-4.46 <ycms mu mu< -2.96) and forward (2.03 <ycms mu mu< 3.53) rapidity regions. For the p-Pb collisions, the results are consistent within experimental and theoretical uncertainties with calculations that include both free-nucleon and nuclear-modified PDFs. For the Pb-Pb collisions, a 3.4<sigma> deviation is seen in the integrated yield between the data and calculations based on the free-nucleon PDFs, while good agreement is found once nuclear modifications are considered.

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

2020

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

—

Svazek periodika

2020

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

26

Strana od-do

76

Kód UT WoS článku

000571810500003

EID výsledku v databázi Scopus

2-s2.0-85090756830