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Title: Measurement of Polarization and Search for CP Violation in Bs0→ϕϕ Decays
Authors: Aaltonen, T.; Álvarez González, B.; Casal, Bruno; Cuevas, Javier; Gómez, G.; Palencia, Enrique; Rodrigo, Teresa; Ruiz Jimeno, Alberto; Scodellaro, Luca; Vila, Iván; Vilar, Rocío; Vizán, J.
Issue Date: Dec-2011
Publisher: American Physical Society
Citation: Physical Review Letters 107(26): 261802 (2011)
Abstract: We present the first measurement of polarization and CP-violating asymmetries in a Bs0 decay into two light vector mesons, Bs0→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 fL=0.348±0.041(stat)±0.021(syst), and the branching ratio B(Bs0→ϕϕ)=[2.32±0.18(stat)±0.82(syst)]×10-5. Asymmetries of decay angle distributions sensitive to CP violation are measured to be Au=-0.007±0.064(stat)±0.018(syst) and Av=-0.120±0.064(stat)±0.016(syst).
Description: 8 páginas, 2 figuras, 1 tabla.-- PACS numbers: 13.25.Hw, 11.30.Er, 12.38.Qk, 14.40.Nd.-- CDF Collaboration: et al.
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ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.107.261802
E-ISSNmetadata.dc.identifier.doi = DOI: 1079-7114
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