====== TTP19-002 The width difference in the $B_s-\bar{B}_s$ system: towards NNLO ====== ^ TTP19-002 The width difference in the $B_s-\bar{B}_s$ system: towards NNLO ^ |** Ulrich Nierste ** | | {{{preprints:2019:ttp19-002.pdf|PDF}} [[https://arxiv.org/abs/1901.01444|arXiv]] | | |