X (3872) in QCD sum rules

被引：0
|
作者：
Matheus, R. D. [1 ]
机构：
[1] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo, SP, Brazil
来源：
BRAZILIAN JOURNAL OF PHYSICS | 2007年 / 37卷 / 01期
关键词：
QCD sum rules; tetraquarks; axial vector mesons;
D O I：
10.1590/S0103-97332007000100020
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
QCD spectral sum rules is used to test the nature of the meson X(3872), assumed to be an exotic four-quark (ccqq) state with J(PC) = 1(++). For definiteness, the current proposed recently by Maiani ct al [1] is used, at leading order in alpha(s), considering the contributions of higher dimension condensates. The value M-X = (3.94 +/- 0.11) GeV is found which is compatible, within the errors, with the experimental candidate X(3872). The uncertainties of our estimates are mainly due to the one from the c quark mass.
引用
收藏
页码：63 / 66
页数：4
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