We have just entered an era of precision measurements for Bs-decay observables. A characteristic feature of the Bs-meson system is Bs0-B̄s0 mixing, which exhibits a sizable decay width difference. The latter feature leads to a subtle complication for the extraction of branching ratios of Bs decays from untagged data samples, leading to systematic biases as large as O(10%) that depend on the dynamics of the considered decay. We point out that this effect can only be corrected for using information from a time-dependent analysis and suggest the use of the effective Bs decay lifetime, which can already be extracted from the untagged data sample, for this purpose. We also address several experimental issues that can play a role in the extraction of effective lifetimes at a hadron collider, and advocate the use of the Bs branching ratios, as presented in this note, for consistent comparisons of theoretical calculations and experimental measurements in particle listings.
Physical Review D
- Pub Date:
- July 2012
- Decays of bottom mesons;
- High Energy Physics - Phenomenology;
- High Energy Physics - Experiment
- 7 pages, 1 figure, title matches published version in Physical Review D