Comment on "Resolving the sign ambiguity in $\Delta \Gamma_s$ with $B_s \to D_s K$"

TL;DR

This paper comments on a recent work addressing the sign ambiguity in the decay width difference of B_s mesons using specific decay channels, providing critical analysis or clarification.

Contribution

It offers a critique or clarification of the methods proposed in the recent paper by Nandi and Nierste regarding sign ambiguity resolution.

Findings

Highlights potential issues or improvements in the original method

Provides alternative perspectives or corrections

Clarifies the implications of the sign ambiguity in B_s decays

Abstract

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].