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)] x 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).

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

CIOCCI, MARIA AGNESE;DELL'ORSO, MAURO;DONATI, SIMONE;PUNZI, GIOVANNI;F. Ruffini;
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)] x 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).
2011
T., Aaltonen; B., Alvarez Gonzalez; S., Amerio; D., Amidei; A., Anastassov; A., Annovi; J., Antos; G., Apollinari; J., Appel; A., Apresyan; T., Arisaw...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/538947
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