First observation of the decay $$\bar{B}$$$$0\atop{s}$$ →; D$$+\atop{s}$$ K∓ and measurement of B($$\bar{B}$$$$0\atop{s}$$ →; D$$±\atop{s}$$K∓)/Br($$\bar{B}$$$$0\atop{s}$$→; D$$+\atop{s}$$ π-)
- Univ. of California, Berkeley, CA (United States)
We present the first observation of the decay $$\bar{B}$$$$0\atop{s}$$ → D$$+\atop{s}$$ K∓ and measure the relative branching fraction of $$\bar{B}$$$$0\atop{s}$$ → D$$+\atop{s}$$ K∓ to $$\bar{B}$$$$0\atop{s}$$ → D$$+\atop{s}$$ π-. The measurement of the relative branching fraction is performed by applying a fit in invariant mass and specific ionization to 1.2 fb-1 of Ds(φπ)X data collected with the CDF II detector in pp collisions at √s = 1.96 TeV at the Fermilab Tevatron collider. We measure B($$\bar{B}$$$$0\atop{s}$$ → D± s K∓¢/B($$\bar{B}$$$$0\atop{s}$$ → D$$+\atop{s}$$ π-) = 0.107±0.019(stat)±0.008(sys). The statistical significance of the $$\bar{B}$$$$0\atop{s}$$ → D$$+\atop{s}$$ K∓ signal is 7.9σ. To cross-check our analysis method, we also measure B($$\bar{B0}$$ → D+K-)/B($$\bar{B0}$$ → D+π-) and B($$\bar{B0}$$ → D*+K-)/B($$\bar{B0}$$ → D*+π-) and verify that our results are in agreement with the world average.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-05CH11231
- OSTI ID:
- 926498
- Report Number(s):
- LBNL-143E
- Resource Relation:
- Related Information: Designation of Academic Dissertation: Doctor of Philosophy; Academic Degree: Physics; Name of Academic Institution: UC Berkeley; Location of Academic Institution: Berkeley, CA
- Country of Publication:
- United States
- Language:
- English
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