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- W2964825387 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 $m_chi$ taking different values are presented. It is found that at some region of $m_chi$, the channel $B_cto D_s^{(ast)}chichi$ has the largest upper limit which is of the order of $10^{-6}$, and for $B_cto D_s^astchichi^dagger$, the largest value of the upper limits can achieve the order of $10^{-5}$. Other decay modes, such as $B_cto D^{(*)}chichi^{(dagger)}$ and $B_cto B^{(*)}chichi^{(dagger)}$, are also considered." @default.
- W2964825387 created "2019-08-13" @default.
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- W2964825387 date "2018-10-08" @default.
- W2964825387 modified "2023-09-24" @default.
- W2964825387 title "The study of the light dark matter in $B_c$ decays" @default.
- W2964825387 hasPublicationYear "2018" @default.
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