Polarizations of J/{psi} and {psi}' in Hadroproduction at the Tevatron in the k{sub t} Factorization Approach

Journal Article · Mon Jul 09 04:00:00 EDT 2001 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.87.022002· OSTI ID:40276952

Yuan, Feng; Chao, Kuang-Ta

We present a calculation for the polarizations of J/{psi} and {psi}' produced in the hadron collisions at the Fermilab Tevatron. Various color-octet channels including S{sup (8)}{sub 0}{sup 1}, P{sup (8)}{sub J}{sup 3}, and S{sup (8)}{sub 1}{sup 3} , as well as contributions from {chi}{sub cJ} decays are considered in the k{sub t} -factorization approach. We find that, in a rather wide range of the transverse momenta of J/{psi} and {psi}' , the production rates could be dominated by the S{sup (8)}{sub 0}{sup 1} channel, and the predicted polarizations from the S{sup (8)}{sub 0}<{sup 1} channel and {chi}{sub cJ} feed-down contributions are roughly compatible with the preliminary CDF data. This might provide a possible release from the conflict between the nonrelativistic QCD collinear parton model calculations and the CDF data.

• Sponsoring Organization: (US)
• OSTI ID: 40276952
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 2 Vol. 87; ISSN 0031-9007
• Publisher: The American Physical Society
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
FACTORIZATION
FERMILAB COLLIDER DETECTOR
FERMILAB TEVATRON
HADRONS
PARTON MODEL
PRODUCTION
QUANTUM CHROMODYNAMICS