Z-boson production in p-Pb collisions at <mml:msqrt>sNN</mml:msqrt>=8.16 TeV and Pb-Pb collisions at <mml:msqrt>sNN</mml:msqrt>=5.02 TeV

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F20%3A00346355" target="_blank" >RIV/68407700:21340/20:00346355 - isvavai.cz</a>

Result on the web

<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>

Result language

angličtina

Original language name

Z-boson production in p-Pb collisions at <mml:msqrt>sNN</mml:msqrt>=8.16 TeV and Pb-Pb collisions at <mml:msqrt>sNN</mml:msqrt>=5.02 TeV

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2020

Confidentiality

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

Name of the periodical

Journal of High Energy Physics

ISSN

1029-8479

e-ISSN

1029-8479

Volume of the periodical

2020

Issue of the periodical within the volume

9

Country of publishing house

IT - ITALY

Number of pages

26

Pages from-to

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UT code for WoS article

000571810500003

EID of the result in the Scopus database

2-s2.0-85090756830