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- W2894734240 abstract "A bstract 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." @default.
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- W2894734240 date "2019-03-01" @default.
- W2894734240 modified "2023-10-17" @default.
- W2894734240 title "The study of light invisible particles in Bc decays" @default.
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- W2894734240 doi "https://doi.org/10.1007/jhep03(2019)028" @default.
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