Resolving the sign ambiguity in Delta Gamma_s with B_s -> D_s K
High Energy Physics - Phenomenology
2012-03-14 v3
Abstract
The analysis of tagged B_s -> J/psi phi decays determines the CP phase phi_s in B_s-anti-B_s mixing with a two-fold ambiguity. The solutions differ in the sign of cos(phi_s) which equals the sign of the width difference Delta Gamma_s among the two B_s mass eigenstates. We point out that this ambiguity can be removed with the help of B_s -> D_s K decays. We compare untagged and tagged strategies and find the tagged analysis more promising. The removal of the sign ambiguity in Delta Gamma_s can be done with relatively low statistics and could therefore be a target for the early stage of B_s -> D_s K studies.
Cite
@article{arxiv.0801.0143,
title = {Resolving the sign ambiguity in Delta Gamma_s with B_s -> D_s K},
author = {Soumitra Nandi and Ulrich Nierste},
journal= {arXiv preprint arXiv:0801.0143},
year = {2012}
}
Comments
6 pages, 2 eps figures, typos in Eqs. (8) and (11) corrected