Measurement of Polarization and Search for CP Violation in Bs0→ϕϕ Decays

Bauer, Gerry P. ; Gomez-Ceballos, Guillelmo ; Goncharov, Maxim ; Makhoul, K. ; Paus, Christoph M. E.

American Physical Society (APS)

Others  :  http://dspace.mit.edu/openaccess-disseminate/1721.1/69192

美国|英语

来源: MIT Theses in DSpace@MIT

【 摘 要 】

We present the first measurement of polarization and CP-violating asymmetries in a B[subscript s][superscript 0] decay into two light vector mesons, B[subscript s][superscript 0]→ϕϕ, and an improved determination of its branching ratio using 295 decays reconstructed in a data sample corresponding to 2.9  fb[superscript -1] of integrated luminosity collected by the CDF experiment at the Fermilab Tevatron collider. The fraction of longitudinal polarization is determined to be f[subscript L]=0.348±0.041(stat)±0.021(syst), and the branching ratio B(B[subscript s][superscript 0]→ϕϕ)=[2.32±0.18(stat)±0.82(syst)]×10[superscript -5]. Asymmetries of decay angle distributions sensitive to CP violation are measured to be A[subscript u]=-0.007±0.064(stat)±0.018(syst) and A[subscript v]=-0.120±0.064(stat)±0.016(syst).