Title
Polarizations of <tex>$J/\Psi$</tex> and <tex>$\Psi(2S)$</tex> mesons produced in <tex>$p\overline{p}$</tex> collisions at <tex>$\sqrt{s}$</tex>=1.96 TeV Polarizations of <tex>$J/\Psi$</tex> and <tex>$\Psi(2S)$</tex> mesons produced in <tex>$p\overline{p}$</tex> collisions at <tex>$\sqrt{s}$</tex>=1.96 TeV
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
New York, N.Y. ,
Subject
Physics
Source (journal)
Physical review letters. - New York, N.Y.
Volume/pages
99(2007) :13 , p. 132001,1-132001,7
ISSN
0031-9007
ISI
000249786700020
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
We have measured the polarizations of J/ψ and ψ(2S) mesons as functions of their transverse momentum pT when they are produced promptly in the rapidity range |y|<0.6 with pT≥5  GeV/c. The analysis is performed using a data sample with an integrated luminosity of about 800  pb-1 collected by the CDF II detector. For both vector mesons, we find that the polarizations become increasingly longitudinal as pT increases from 5 to 30  GeV/c. These results are compared to the predictions of nonrelativistic quantum chromodynamics and other contemporary models. The effective polarizations of J/ψ and ψ(2S) mesons from B-hadron decays are also reported.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/60f113/ad56baab.pdf
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