First Flavor-Tagged Determination of Bounds on Mixing-Induced CP Violation in B^0_s --> j/psi phi Decays
This Letter describes the first determination 1 of bounds on the CP-violation parameter 2{beta}{sub s} using B{sub s}{sup 0} decays in which the flavor of the bottom meson at production is identified. The result is based on approximately 2, 000 B{sub s}{sup 0} {yields} J/{psi}{phi} decays reconstructed in a 1.35 fb{sup -1} data sample collected with the CDFII detector using p{bar p} collisions produced at the Fermilab Tevatron. We report confidence regions in the two-dimensional space of 2{beta}{sub s} and the decay-width difference {Delta}{Lambda}. Assuming the standard model predictions of 2{beta}{sub s} and {Delta}{Lambda}, the probability of a deviation as large as the level of the observed data is 15%, corresponding to 1.5 Gaussian standard deviations.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 921332
- Report Number(s):
- FERMILAB-PUB-07-663-E; TRN: US0801691
- Country of Publication:
- United States
- Language:
- English
Similar Records
First Flavor-Tagged Determination of Bounds on Mixing-Induced CP Violation in B{sub s}{sup 0}{yields}J/{psi}{phi} Decays
Measurement of the CP-violating phase phi sJ/psi phi using the flavor-tagged decay Bs(0) -> J/psi phi in 8 fb(-1) of p(p)over-bar collisions