Measurement of polarization and search for CP violation in B(s)0→φφ decays.

Journal article

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

Authors: Aaltonen, T; Álvarez González, B; Amerio, S; Amidei, D; Anastassov, A

• Publication status: Published
• Journal: Physical Review Letters
• Volume: 107
• Issue: 26
• Pages: 261802
• Publication date: 2011-12-01
• DOI: 10.1103/physrevlett.107.261802
• EISSN: 1079-7114
• ISSN: 0031-9007
• Language: English
• Keywords: CDF Collaboration