W-+/--boson production in p-Pb collisions at root sNN=8.16 TeV and Pb-Pb collisions at root sNN=5.02 TeV

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F23%3A00367838" target="_blank" >RIV/68407700:21340/23:00367838 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1007/JHEP05(2023)036" target="_blank" >https://doi.org/10.1007/JHEP05(2023)036</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/JHEP05(2023)036" target="_blank" >10.1007/JHEP05(2023)036</a>

Result language

angličtina

Original language name

W-+/--boson production in p-Pb collisions at root sNN=8.16 TeV and Pb-Pb collisions at root sNN=5.02 TeV

Original language description

The production of the W bosons measured in p-Pb collisions at a centre-of-mass energy per nucleon-nucleon collision root sNN = 8.16 TeV and Pb-Pb collisions at root sNN = 5.02 TeV with ALICE at the LHC is presented. The W-+/- bosons are measured via their muonic decay channel, with the muon reconstructed in the pseudorapidity region -4 <eta(mu)(lab)< -2.5 with transverse momentum p(mu)(T)> 10 GeV/c. While in Pb-Pb collisions the measurements are performed in the forward (2.5 <y(cms)(mu)< 4) rapidity region, in p-Pb collisions, where the centre-of-mass frame is boosted with respect to the laboratory frame, the measurements are performed in the backward (-4.46 <y(cms)(mu)< -2.96) and forward (2.03 <y(cms)(mu)< 3.53) rapidity regions. The W- and W+ production cross sections, lepton-charge asymmetry, and nuclear modification factors are evaluated as a function of the muon rapidity. In order to study the production as a function of the p-Pb collision centrality, the production cross sections of the W- and W+ bosons are combined and normalised to the average number of binary nucleon-nucleon collision < N-coll >. In Pb-Pb collisions, the same measurements are presented as a function of the collision centrality. Study of the binary scaling of the W-+/--boson cross sections in p-Pb and Pb-Pb collisions is also reported. The results are compared with perturbative QCD calculations, with and without nuclear modifications of the Parton Distribution Functions (PDFs), as well as with available data at the LHC. Significant deviations from the theory expectations are found in the two collision systems, indicating that the measurements can provide additional constraints for the determination of nuclear PDFs and in particular of the light-quark distributions.

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

<a href="/en/project/LM2018104" target="_blank" >LM2018104: Research Infrastructure for experiments at CERN</a><br>

Continuities

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

Publication year

2023

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

2023

Issue of the periodical within the volume

5

Country of publishing house

IT - ITALY

Number of pages

44

Pages from-to

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UT code for WoS article

001022701000001

EID of the result in the Scopus database

2-s2.0-85159143281