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)-> phi phi, 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)->phi phi) = [2.32+/- 0.18(stat)+/-0.82(syst)]x10(-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).

T., A., B., Á.G., S., A., D., A., A., A., A., A., et al. (2011). Measurement of Polarization and Search for CP Violation in B-s(0)->phi phi decays. PHYSICAL REVIEW LETTERS, 107(26), 261802-1-261802-8 [10.1103/PhysRevLett.107.261802].

Measurement of Polarization and Search for CP Violation in B-s(0)->phi phi decays

BARRIA, PATRIZIA;GAROSI, PAOLA;RUFFINI, FABRIZIO;SCRIBANO, ANGELO;SQUILLACIOTI, PAOLA;
2011-01-01

Abstract

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)-> phi phi, 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)->phi phi) = [2.32+/- 0.18(stat)+/-0.82(syst)]x10(-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).
2011
T., A., B., Á.G., S., A., D., A., A., A., A., A., et al. (2011). Measurement of Polarization and Search for CP Violation in B-s(0)->phi phi decays. PHYSICAL REVIEW LETTERS, 107(26), 261802-1-261802-8 [10.1103/PhysRevLett.107.261802].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/41987
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