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Jul 4 – 11, 2012
Melbourne Convention and Exhibition Centre
Australia/Melbourne timezone
ICHEP2012 - 36th International Conference for High Energy Physics

Bs decays at Belle

Jul 7, 2012, 12:30 PM
15m
Room 220 (Melbourne Convention and Exhibition Centre)

Room 220

Melbourne Convention and Exhibition Centre

Melbourne Australia

Speaker

Ms Felicitas Thorne (Institute of High Energy Physics (AT))

Description

We study the decays $B^0_s\rightarrow J/\psi\phi$ and $B^0_s\rightarrow J/\psi K^+K^-$ using a 121.4 fb$^{-1}$ data sample collected at the $\Upsilon(5S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. The decay $B^0_s\rightarrow J/\psi\phi$ is an important mode for measuring the CP violating phase $\beta_s$ in the $B_s\bar{B}_s$ mixing, which is of particular interest as it is sensitive to physics beyond the Standard Model. Therefore, regarding the current PDG value with a relative error of 36%, a precise measurement of this branching fraction is essential. Furthermore, in this analysis the branching fraction of the decay $B^0_s\rightarrow J/\psi K^+K^-$, which has not been measured so far, is determined simultaneously with the branching fraction of the $B^0_s\rightarrow J/\psi\phi$. By separating these two final states, it is also possible to calculate the $S$-wave contribution within the $\phi$ mass region.

Primary author

Ms Felicitas Thorne (Institute of High Energy Physics (AT))

Presentation materials