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arXiv · 2105.12066

$B_c$ meson exclusive decays to a $P$-wave charmonium and a pion at NLO accuracy

Zi-Qiang Chen·Cong-Feng Qiao
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Abstract

In this paper, we calculate the next-to-leading order (NLO) quantum chromodynamics (QCD) corrections to the exclusive processes $B_c^+\to \chi_{cJ}(h_c)\pi^+$ in the framework of the nonrelativistic QCD (NRQCD) factorization formalism. The results show that NLO QCD corrections markedly enhance the branching ratios with $K$ factors of about 2.5. In combination with the study of $B_c^+\to J/\psi\pi^+$, we find that the NLO NRQCD prediction for the ratio of branching fractions $\frac{\mathcal{B}(B_c^+\to \chi_{c0}\pi^+)}{\mathcal{B}(B_c^+\to J/\psi \pi^+)}$ is then compatible with the experimental measurement.

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Zi-Qiang Chen, Cong-Feng Qiao. 2021-05-25. $B_c$ meson exclusive decays to a $P$-wave charmonium and a pion at NLO accuracy. https://doi.org/10.1103/physrevd.104.016019

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