TTP17-054 Towards next-to-next-to-leading-log accuracy for the width difference in the $B_s$--$\bar B_s$ system: fermionic contributions to order $(m_c/m_b)^0$ and $(m_c/m_b)^1$

TTP17-054 Towards next-to-next-to-leading-log accuracy for the width difference in the $B_s$–$\bar B_s$ system: fermionic contributions to order $(m_c/m_b)^0$ and $(m_c/m_b)^1$
H.M. Asatrian, Artyom Hovhannisyan, Ulrich Nierste, Arsen Yeghiazaryan
JHEP 1710 (2017) 191
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