In this paper, we present a comprehensive analysis of the next-to-next-to-leading-order (NNLO) QCD corrections to the exclusive processes $e^{+}e^{-}\to J/\psi+\eta_{c}$, $e^{+}e^{-}\to J/\psi+\chi_{cJ}$, $e^{+}e^{-}\to \eta_{c}+\gamma$, and $e^{+}e^{-}\to \chi_{cJ}+\gamma$ $(J=0,1,2)$ at the $B$ factories, comparing p...
In this work, we comprehensively study the total and differential decay widths of the radiative Dalitz decays $H \to l^+l^-\gamma$ up to QCD next-to-leading order (NLO) accuracy within the framework of NRQCD factorization. Our calculation includes the decays of $S$-wave states ($\eta_c, \eta_b$) and the $P$-wave triple...
In quantum mechanics the modulus square of the wave function is the probability of an event --- positivity is self-evident. Quantum field theory corresponds to quantum mechanics one-to-one: the wave function corresponds to the matrix element, so the probability of a process should be the modulus square of the matrix el...
Bin Gong, Xu-Dong Huang, Jian-Xiong Wang et al.· 0 citations
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