Radiative decay of the X(3872) as a mixed molecule-charmonium state in QCD sum rules

被引：34

作者：

Nielsen, M. ^{[1
]}

Zanetti, C. M. ^{[1
]}

机构：

[1] Univ Sao Paulo, Inst Fis, BR-05389970 Sao Paulo, Brazil

来源：

PHYSICAL REVIEW D | 2010年 / 82卷 / 11期

基金：

巴西圣保罗研究基金会;

关键词：

ALPHA(S); MASS;

D O I：

10.1103/PhysRevD.82.116002

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We use QCD sum rules (QCDSR) to calculate the width of the radiative decay of the meson X(3872), assumed to be a mixture between charmonium and exotic molecular [c (q) over bar][q (c) over bar] states with J(PC) = 1(++). We find that in a small range for the values of the mixing angle, 5 degrees <= theta <= 13 degrees, we get the branching ratio Gamma(X -> J/psi gamma)/Gamma(X -> J/psi pi(+)pi(-)) = 0.19 +/- 0.13, which is in agreement, with the experimental value. This result is compatible with the analysis of the mass and decay width of the mode J/psi(n pi) performed in the same approach.

引用

页数：8

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