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Título : Measurement of Polarization and Search for CP Violation in Bs0→ϕϕ Decays
Autor : 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.
Fecha de publicación : Dec-2011
Editor: American Physical Society
Citación : Physical Review Letters 107(26): 261802 (2011)
Resumen: 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).
Descripción : 8 páginas, 2 figuras, 1 tabla.-- PACS numbers: 13.25.Hw, 11.30.Er, 12.38.Qk, 14.40.Nd.-- CDF Collaboration: et al.
Versión del editor: http://dx.doi.org/10.1103/PhysRevLett.107.261802
URI : http://hdl.handle.net/10261/46211
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.107.261802
Citación : Physical Review Letters 107(26): 261802 (2011)
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