e+e- Annihilation into J/ψ+J/ψ -: art. no. 162001

被引：97

作者：

Bodwin, GT

Lee, J

Braaten, E

机构：

[1] Argonne Natl Lab, Div High Energy Phys, Argonne, IL 60439 USA

[2] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA

[3] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.90.162001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Recent measurements by the Belle Collaboration of the exclusive production of two charmonia in e(+)e(-) annihilation differ substantially from theoretical predictions. We suggest that a significant part of the discrepancy can be explained by the process e(+)e(-)-->J/psi+J/psi. Because the J/psi+J/psi production process can proceed through fragmentation of two virtual photons into two c (c) over bar pairs, its cross section may be larger than that for J/psi+eta(c) by about a factor of 3.7, in spite of a suppression factor alpha(2)/alpha(s)(2) that is associated with the QED and QCD coupling constants.

引用

页数：4

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