Comment on "Resolving the sign ambiguity in $\Delta \Gamma_s$ with $B_s   \to D_s K$"
  This is a comment on the recent paper by Soumitra Nandi1 and Ulrich Nierste ``Resolving the sign ambiguity in $\Delta \Gamma_s$ with $B_s \to D_s K$'', arXiv:0801.0143 [hep-ph]. 
Yuehong Xie