Observation of nuclear modifications in W± boson production in pPb collisions at √s NN=8.16TeV; Physics Letters B; Vol. 800

Observation of nuclear modifications in W± boson production in pPb collisions at √s NN=8.16TeV; Physics Letters B; Vol. 800

Bibliographische Detailangaben
Parent link:	Physics Letters B Vol. 800.— 2020.— [135048, 24 p.]
Körperschaft:	Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
Weitere Verfasser:	Sirunyan А. М., Tumasyan A. R., Adam W. Wolfgang, Ambrogi F. Federico, Tyurin N. E. Nikolay Evgenjevich, Babaev A. A. Anton Anatoljevich
Zusammenfassung:	Title screen The production of W± bosons is studied in proton-lead (pPb) collisions at a nucleon-nucleon centre-of-mass energy of √s NN=8.16TeV. Measurements are performed in the W±→μ±νμ channel using a data sample corresponding to an integrated luminosity of 173.4±6.1nb−1, collected by the CMS Collaboration at the LHC. The number of positively and negatively charged W bosons is determined separately in the muon pseudorapidity region in the laboratory frame \|ηlabμ\|<2.4 and transverse momentum pTμ>25GeV/c. The W± boson differential cross sections, muon charge asymmetry, and the ratios of W± boson yields for the proton-going over the Pb-going beam directions are reported as a function of the muon pseudorapidity in the nucleon-nucleon centre-of-mass frame. The measurements are compared to the predictions from theoretical calculations based on parton distribution functions (PDFs) at next-to-leading-order. The results favour PDF calculations that include nuclear modifications and provide constraints on the nuclear PDF global fits.
Sprache:	Englisch
Veröffentlicht:	2020
Schlagworte:	электронный ресурс труды учёных ТПУ CMS heavy ions electroweak W boson pPb
Online-Zugang:	https://doi.org/10.1016/j.physletb.2019.135048
Format:	xMaterials Elektronisch Buchkapitel
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=666214

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