Lancaster, M;
Nurse, E;
Waters, DCDFC;
(2007)
Polarizations of J / ψ and ψ ( 2 S ) Mesons Produced in p ¯ p Collisions at √ s = 1.96 TeV.
Physical Review Letters
, 99
(13)
, Article 132001. 10.1103/PhysRevLett.99.132001.
![[thumbnail of 131839.pdf]](https://discovery.ucl.ac.uk/style/images/fileicons/text.png) Preview |
Text
131839.pdf Download (284kB) |
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.
| Type: | Article |
|---|---|
| Title: | Polarizations of J / ψ and ψ ( 2 S ) Mesons Produced in p ¯ p Collisions at √ s = 1.96 TeV |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.99.132001 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.99.132001 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/131839 |
Archive Staff Only
 |
View Item |
