Direct J/{psi} and {psi}{sup {prime}} polarization and cross sections at the Fermilab Tevatron
Journal Article
·
· Physical Review, D
- Theory Division, CERN, CH-1211 Geneva 23 (Switzerland)
- Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX (England)
Transverse polarization of {sup 3}S{sub 1} charmonium states, produced directly in p{bar p} collisions at asymptotically large transverse momentum p{sub t}, has emerged as the most prominent test of color octet contributions and spin symmetry in quarkonium production. We present predictions for the polar angle distribution at moderate values of p{sub t}{approximately}4{endash}20 GeV, covered by the Fermilab Tevatron run I data. We update the fits of NRQCD matrix elements and discuss their theoretical uncertainties. With our best fit values, no transverse polarization is expected at p{sub t}{approximately}5 GeV, but the angular distribution is predicted to change dramatically as p{sub t} increases to 20 GeV. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 562888
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 9 Vol. 55; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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