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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

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

Projekt

<a href="/cs/project/LM2018104" target="_blank" >LM2018104: Výzkumná infrastruktura pro experimenty v CERN</a><br>

Návaznosti

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

Rok uplatnění

2023

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

1029-8479

Svazek periodika

2023

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

IT - Italská republika

Počet stran výsledku

44

Strana od-do

—

Kód UT WoS článku

001022701000001

EID výsledku v databázi Scopus

2-s2.0-85159143281