Abstract
We compute the electromagnetic mass difference for the B-, D- and K-mesons using QCD sum rules with double dispersion relations. For the B- and D-mesons we also compute the linear quark mass correction, whereas for the K the standard soft theorems prove more powerful. The mass differences, which have not previously been computed via a double dispersion, are fully consistent with experiment, albeit with large uncertainties.
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Acknowledgments
RZ is supported by a CERN associateship and an STFC Consolidated Grant, ST/P0000630/1. We are grateful to Michele Della Morte, Antonin Portelli and Max Hanson for informative comments on the lattice literature.
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Rowe, M., Zwicky, R. Isospin mass differences of the B, D and K. J. High Energ. Phys. 2023, 89 (2023). https://doi.org/10.1007/JHEP06(2023)089
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DOI: https://doi.org/10.1007/JHEP06(2023)089