TTP22-030 The width difference in the $B-\bar{B}$ system at next-to-next-to-leading order of QCD
TTP22-030 The width difference in the $B-\bar{B}$ system at next-to-next-to-leading order of QCD
Marvin Gerlach, Ulrich Nierste, Vladyslav Shtabovenko, Matthias Steinhauser
Phys.Rev.Lett. 129 (2022) 10, 102001
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arXiv