Is the Belle result for the cross section or (e+e-→J/ψ+ηc) a real difficulty for QCD?

被引：142

作者：

Bondar, AE ^{[1
]}

Chernyak, VL ^{[1
]}

机构：

[1] Budker Inst Nucl Phys, Novosibirsk 630090, Russia

来源：

PHYSICS LETTERS B | 2005年 / 612卷 / 3-4期

关键词：

D O I：

10.1016/j.physletb.2005.03.021

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

It is argued that difficulties in reconciling the values of the cross-section a (e(+)e(-) -> J/psi + eta(c)) measured at Belle and calculated within non-relativistic QCD (NRQCD) are caused not by some misinterpretation of the data or other exotic explanations, but by poor applicability of NRQCD to such processes. We use general theory of hard exclusive processes in QCD together with more realistic models of charmonium wave functions, and show that the Belle result can be naturally explained. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：215 / 222

页数：8

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