Two- gamma decay widths of glueballs.
Two- gamma decay widths of glueballs.
复制标题
胶球的二伽马衰变宽度。
DOI：
10.1103/physrevd.39.2657
复制
发表时间：
1989
期刊：
影响因子：
--
通讯作者：
Parisi
中科院分区：
文献类型：
--
作者：
Kada;Kessler;Parisi
利用非相对论胶子束缚态模型，我们计算了伽马(G..-->；Gamma..)，其中G是赝标量、张量或标量双胶子，从过程的振幅开始.这些振幅是在微扰QCD中的最低阶，通过从Constantini，de Tollis和Pistoni多年前进行的QED计算得出的。未知参数(双胶子波函数，或其一阶或二阶导数，在原点)是通过使用伽马的测量值(J/psi.-->；..G..伽马.)来确定的。对于不同的胶球候选者，我们的预测与目前的实验极限进行了比较。
Using a nonrelativistic gluon bound-state model, we compute GAMMA(G..--> gamma gamma..), where G is a pseudoscalar, tensor, or scalar digluon, starting from the amplitudes of the process ..gamma gamma -->..g/sup */g/sup */ at threshold, the g/sup */'s being massive constituent gluons. Those amplitudes are obtained, at lowest order in perturbative QCD, by deriving them from a QED calculation performed many years ago by Constantini, de Tollis, and Pistoni. The unknown parameter (the digluon wave function, or its first or second derivative, at the origin) is determined by using measured values of GAMMA(J/psi..-->..G..gamma..). Our predictions are compared, for various glueball candidates, with present experimental limits.