Publication: Z-boson production in p-Pb collisions at √sNN = 8.16 TeV and Pb-Pb collisions at √sNN = 5.02 TeV
Дата
2020
Авторы
Acharya, S.
Adamova, D.
Adler, A.
Adolfsson, J.
Belyaev, V.
Bogdanov, A.
Bolozdynya, A.
Borissov, A.
Grigoriev, V.
Kaplin, V.
Journal Title
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Аннотация
© 2020, The Author(s).Measurement of Z-boson production in p-Pb collisions at sNN = 8.16 TeV and Pb-Pb collisions at sNN = 5.02 TeV is reported. It is performed in the dimuon decay channel, through the detection of muons with pseudorapidity −4 < ημ< −2.5 and transverse momentum pTμ> 20 GeV/c in the laboratory frame. The invariant yield and nuclear modification factor are measured for opposite-sign dimuons with invariant mass 60 < mμμ< 120 GeV/c2 and rapidity 2.5 <ycmsμμ< 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 <ycmsμμ< −2.96) and forward (2.03 <ycmsμμ< 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 3.4σ 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. [Figure not available: see fulltext.].
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Z-boson production in p-Pb collisions at √sNN = 8.16 TeV and Pb-Pb collisions at √sNN = 5.02 TeV / Acharya, S. [et al.] // Journal of High Energy Physics. - 2020. - 2020. - № 9. - 10.1007/JHEP09(2020)076
URI
https://www.doi.org/10.1007/JHEP09(2020)076
https://www.scopus.com/record/display.uri?eid=2-s2.0-85090756830&origin=resultslist
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https://openrepository.mephi.ru/handle/123456789/22303
https://www.scopus.com/record/display.uri?eid=2-s2.0-85090756830&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000571810500003
https://openrepository.mephi.ru/handle/123456789/22303