B+ decay to K+ ηη with (ηη) from the D (D)over-bar(3720) bound state

被引：3
|
作者：
Brandao, Pedro C. S. [1 ,2 ,3 ]
Song, Jing [2 ,3 ]
Abreu, Luciano M. [1 ,4 ,5 ]
Oset, E. [1 ,2 ,3 ]
机构：
[1] Univ Fed Bahia, Inst Fis, Campus Ondina, BR-40170115 Salvador, BA, Brazil
[2] Univ Valencia, Inst Invest Paterna, Dept Fis Teor, CSIC,Ctr Mixto, Valencia 46071, Spain
[3] Univ Valencia, Ctr Mixto, IFIC, CSIC,Inst Invest Paterna, Valencia 46071, Spain
[4] Beihang Univ, Sch Phys, Beijing 102206, Peoples R China
[5] Univ Sao Paulo, Inst Fis, Rua Matao, BR-05508090 Sao Paulo, SP, Brazil
来源：
PHYSICAL REVIEW D | 2023年 / 108卷 / 05期
基金：
中国博士后科学基金; 中国国家自然科学基金; 欧盟地平线“2020”;
关键词：
J/PSI-D(D)OVER-BAR; F(0)(980); E(+)E(-);
D O I：
10.1103/PhysRevD.108.054004
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We search for a B decay mode where one can find a peak for a DD bound state predicted in effective theories and in lattice QCD calculations, which has also been claimed from some reactions that show an accumulated strength in D D over bar production at threshold. We find a good candidate in the B+-> K+eta eta reaction, by looking at the eta eta mass distribution. The reaction proceeds via a first step in which one has the B+-> D*+ D-0 reaction followed by D*(+) (s) decay to (DK+)-K-0 and a posterior fusion of D-0 over bar D-0 to eta eta, implemented through a triangle diagram that allows the D-0 over bar D-0 to be virtual and to produce the bound state. The choice of eta eta to see the peak is based on results of calculations that find the eta eta among the light pseudoscalar channels with stronger coupling to the D D over bar bound state. We find a neat peak around the predicted mass of that state in the eta eta mass distribution, with an integrated branching ratio for B+-> K+ (D D, bound); (D D, bound) -> eta eta of the order of 1.5 x 10(-4), a large number for hadronic B decays, which should motivate its experimental search.
引用
收藏
页数：6
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