SIGNATURE FOR COLOR-OCTET PRODUCTION OF J PSI IN E(+)E(-) ANNIHILATION/

Authors
Citation
E. Braaten et Yq. Chen, SIGNATURE FOR COLOR-OCTET PRODUCTION OF J PSI IN E(+)E(-) ANNIHILATION/, Physical review letters, 76(5), 1996, pp. 730-733
Citations number
21
Categorie Soggetti
Physics
Journal title
ISSN journal
00319007
Volume
76
Issue
5
Year of publication
1996
Pages
730 - 733
Database
ISI
SICI code
0031-9007(1996)76:5<730:SFCPOJ>2.0.ZU;2-E
Abstract
The inclusive cross section for the production of J/psi in e(+)e(-) an nihilation is studied using a recently developed factorization formali sm. In addition to the conventional color-singlet contribution, we inc lude contributions from c (c) over bar pairs that are produced at shor t distances in color-octet states. The color-octet contributions are s uppressed by the smaller probability for the color-octet c (c) over ba r pair to evolve into a state that includes a psi, but they may domina te near the upper end point of the psi energy spectrum. The signature for the color-octet contribution is a dramatic change in the angular d istribution of the psi, near the end point.