Measurement of Polarization and Search for CP Violation in Bs0→ϕϕ Decays
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...
| Główni autorzy: | , , , , |
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| Kolejni autorzy: | |
| Format: | Artykuł |
| Język: | en_US |
| Wydane: |
American Physical Society (APS)
2012
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| Dostęp online: | http://hdl.handle.net/1721.1/69192 https://orcid.org/0000-0002-6047-4211 |
| Streszczenie: | 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). |
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