Signature for color-octet production of {ital J}/{psi} in {ital e}{sup +}{ital e}{sup {minus}} annihilation
- Department of Physics, The Ohio State University, Columbus, Ohio 43210 (United States)
- Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208 (United States)
The inclusive cross section for the production of {ital J}/{psi} in {ital e}{sup +}{ital e}{sup {minus}} annihilation is studied using a recently developed factorization formalism. In addition to the conventional color-singlet contribution, we include contributions from {ital c{bar c}} pairs that are produced at short distances in color-octet states. The color-octet contributions are suppressed by the smaller probability for the color-octet {ital c{bar c}} pair to evolve into a state that includes a {psi}, but they may dominate near the upper end point of the {psi} energy spectrum. The signature for the color-octet contribution is a dramatic change in the angular distribution of the {psi} near the end point. {copyright} {ital 1996 The American Physical Society.}
- Research Organization:
- Northwestern University
- DOE Contract Number:
- FG02-91ER40684
- OSTI ID:
- 278796
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 5 Vol. 76; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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