Color-octet contributions to x{sub F} distributions in J/{psi} hadroproduction at fixed target energies
- Theory Group, Tata Institute of Fundamental Research, Homi Bhabha Road, Bombay 400005 (India)
We study J/{psi} production at fixed-target energies, including the color-octet production mechanisms predicted by NRQCD. In an earlier paper, we found that the octet components were crucial in understanding p{sub T}-integrated forward (x{sub F}{gt}0) cross sections. Here we make a detailed comparison of the theoretical predictions with measured x{sub F} distributions from fixed-target experiments. We find that the model predictions agree well with data. Taking into account higher orders in NRQCD, we argue that {sigma}({chi}{sub 1})/{sigma}({chi}{sub 2})=0.6, in excellent agreement with data. Similiar arguments also predict that {sigma}({chi})/{sigma}(J/{psi}) is roughly equal in photo- and hadroproduction. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 467514
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 5 Vol. 55; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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