Tentative estimates of B ( X ( 3872 )-* J 0 J 0 X c 1 ) and B ( X ( 3872 )-* J + J - X c 1 )

被引：1
|
作者：
Achasov, N. N. [1 ]
Shestakov, G. N. [1 ]
机构：
[1] SL Sobolev Inst Math, Lab Theoret Phys, Novosibirsk 630090, Russia
来源：
PHYSICAL REVIEW D | 2024年 / 110卷 / 01期
关键词：
REPRESENTATIONS; SINGULARITIES;
D O I：
10.1103/PhysRevD.110.016023
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The rates of the X ( 3872 )-* JT0JT0%c1 0 JT 0 % c1 and X ( 3872 )-* JT+JT-%c1 + JT - % c1 decays are estimated in the model of the triangle loop diagrams with charmed DDD D D and DD D D D mesons in the loops. There are the triangle logarithmic singularities in the physical region of the X ( 3872 )-* JT0JT0%c1 0 JT 0 % c1 decay which manifest themselves as narrow peaks in the JT0%c1 0 % c1 mass spectrum near the D 0 D 0 threshold. The model predicts approximately the same branching fractions of the X ( 3872 )-* JT0JT0%c1 0 JT 0 % c1 and X ( 3872 )-* JT+JT-%c1 + JT - % c1 decays at the level of about ( 0.8-1.7 ) x 10-4. - 4 . A distinct prediction of the model is the value of the ratio 7Z 1 / 4 13(X(3872) ( X ( 3872 )-* JT+JT-%c1)/13(X(3872) + JT - % c1 ) / 13 ( X ( 3872 )-* JT0JT0%c1) 0 JT 0 % c1 ) approximate to 1.1. .1 . It weakly depends on the X ( 3872 ) resonance parameters and indicates a significant violation of the isotopic symmetry according to which one would expect 7Z 1 / 4 2.
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