Radiative decay of the X(3872) state as a mixture of molecule and charmonium

被引：0
|
作者：
Zanetti, C. M. [1 ]
Nielsen, M. [1 ]
机构：
[1] Univ Sao Paulo, Inst Fis, BR-05389970 Sao Paulo, Brazil
来源：
NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS | 2010年 / 207-08卷
基金：
巴西圣保罗研究基金会;
关键词：
QCD SUM-RULES; TAU-DECAYS; RESONANCE; ALPHA(S); VACUUM; MASS;
D O I：
10.1016/j.nuclphysbps.2010.10.065
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
We use QCD sum rules 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(0) <= theta <= 13(0), 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
收藏
页码：253 / 256
页数：4
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