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$M(B^*_c)-M(B_c)$ Splitting from Nonrelativistic Renormalization Group

A. A. Penin·A. Pineda·V. A. Smirnov·M. Steinhauser
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Abstract

We compute the hyperfine splitting in a heavy quarkonium composed of different flavors in next-to-leading logarithmic approximation using the nonrelativistic renormalization group. We predict the mass difference of the vector and pseudoscalar charm-bottom mesons to be $M(B^*_c)-M(B_c)=46 \pm 15 {(\rm th)} {}^{+13}_{-11} (δα_s)$ MeV.

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A. A. Penin, A. Pineda, V. A. Smirnov, M. Steinhauser. 2018-12-30. $M(B^*_c)-M(B_c)$ Splitting from Nonrelativistic Renormalization Group. https://doi.org/10.1016/j.physletb.2004.04.066%2010.1016%2Fj.physletb.2009.05.036%2010.1016%2Fj.physletb.2009.12.035

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