Author:
Li Geng,Wang Tianhong,Jiang Yue,Tan Xiao-Ze,Wang Guo-Li
Abstract
Abstract
In this paper, we study the light scalar and pseudoscalar invisible particles in the flavor changing neutral current processes of the B
c
meson. Effective operators are introduced to describe the couplings between quarks and light invisible particles. The Wilson coefficients are extracted from the experimental results of the B and D mesons, which are used to predict the upper limits of the branching fractions of the similar decay processes for the B
c meson. The hadronic transition matrix element is calculated with the instantaneously approximated Bethe-Salpeter method. The upper limits of the branching fractions when m
χ
taking different values are presented. It is found that at some region of m
χ
, the channel B
c
→ D
s
(*)
χχ has the largest upper limit which is of the order of 10−6, and for B
c
→ D
s
*
χχ
†, the largest value of the upper limits can achieve the order of 10−5. Other decay modes, such as B
c
→ D
(*)
χχ
(†) and B
c
→ B
(*)
χχ
(†), are also considered.
Publisher
Springer Science and Business Media LLC
Subject
Nuclear and High Energy Physics
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