B->K eta' decay as a unique probe of the eta' meson

被引：74

作者：

Halperin, I

Zhitnitsky, A

机构：

[1] Department of Physics and Astronomy, University of British Columbia, Vancouver, BC, V6T 1Z1

来源：

PHYSICAL REVIEW D | 1997年 / 56卷 / 11期

关键词：

D O I：

10.1103/PhysRevD.56.7247

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A theory of the B-->K eta' decay is proposed. It is based on the Cabibbo-favored b--><(c)over bar cs> process followed by a direct materialization of the <(c)over bar c> pair into the eta'. This mechanism works due to a nonvalence Zweig-rule-violating c-quark component of the eta', which is unique to its very special nature. This nonperturbative ''intrinsic charm'' content of the eta' is evaluated using the operator product expansion and QCD low-energy theorems. Our results are consistent with an unexpectedly large B(B-->K eta')similar or equal to 7.8X10(-5) recently announced by CLEO. [S0556-2821(97)04521-9].

引用

页码：7247 / 7258

页数：12

共 45 条

[1] RENORMALIZATION AND TOPOLOGICAL SUSCEPTIBILITY ON THE LATTICE - SU(2) YANG-MILLS THEORY [J].