Hadronic {ital J}/{psi} production calculated in the NRQCD factorization formalism
- Department of Physics, University of Wisconsin, Madison, Wisconsin 53706 (United States)
- Theory Group, Department of Physics, University of Texas, Austin, Texas 78712 (United States)
The NRQCD factorization formalism of Bodwin, Braaten, and Lepage prescribes how to write quarkonium production rates as a sum of products of short-distance coefficients times nonperturbative long-distance NRQCD matrix elements. We present a calculation of the inclusive cross section for hadronic {psi} production within the framework of the factorization formalism. Our method applies to the case in which the helicity of the {psi} is not measured. In addition to the well-known {ital color}-{ital singlet} production mechanisms, there are equally important mechanisms in which the {ital c{bar c}} pair that forms the {ital J}/{psi} is initially produced in a {ital color}-{ital octet} state, in either a {sup 3}{ital S}{sub 1}, {sup 1}{ital S}{sub 0}, {sup 3}{ital P}{sub 0}, or {sup 3}{ital P}{sub 2} angular-momentum configuration. In our presentation, we faithfully follow the {open_quote}{open_quote}matching{close_quote}{close_quote} procedure, thereby shedding light on the NRQCD factorization formalism. We determine the short-distance coefficients appearing in the factorization formula, and we point out how one may systematically include relativistic corrections in these calculations. {copyright} {ital 1996 The American Physical Society.}
- Research Organization:
- University of Wisconsin
- DOE Contract Number:
- FG02-95ER40896
- OSTI ID:
- 383413
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 5 Vol. 54; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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