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(Bc∗)−M(Bc)=46±15(th)−11+13(δαs) MeV.
@article{arxiv.hep-ph/0403080,
title = {$M(B^*_c)-M(B_c)$ Splitting from Nonrelativistic Renormalization Group},
author = {A. A. Penin and A. Pineda and V. A. Smirnov and M. Steinhauser},
journal= {arXiv preprint arXiv:hep-ph/0403080},
year = {2019}
}
Comments
Eq.(22) and Appendix corrected, numerical results slightly changed. arXiv admin note: text overlap with arXiv:hep-ph/0312086