We report a Dalitz-plot analysis of the charmless hadronic decays of neutral B mesons to K(+/-) pi(-/+) pi(0) With a sample of (231.8 +/- 2.6) x 10(6)Y(4S) -> B (B) over bar B decays collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC, we measure the magnitudes and phases of the intermediate resonant and nonresonant amplitudes for B(0) and (B) over bar (0) decays and determine the corresponding CP-averaged branching fractions and charge asymmetries. The inclusive branching fraction and CP-violating charge asymmetry are measured to be B(B(0) -> K(+) pi(-) pi(0)) = (35.7(-1.5)(+2.6) +/- 2.2) x 10(-6) and A(CP) -0.030(-0.051)(+0.045) +/- 0.055 where the first errors are statistical and the second systematic. We observe the decay B(0) -> K*(0)(892)pi(0) with the branching fraction B(B(0) -> K*(0)(892)pi(0)) = (3.6(-0.8)(+0.7) +/- 0.4) x 10(-6) This measurement differs from zero by 5.6 standard deviations (including the systematic uncertainties). The selected sample also contains B(0) -> (D) over bar (0) pi(0) decays where (D) over bar (0) -> K(+) pi(-), and we measure B(B(0) -> (D) over bar (0) pi(0)) = (2.93 +/- 0.17 +/- 0.18) x 10(-4).
Dalitz plot analysis of the decay B(0)((B)over-bar(0))-> K(+/-)pi(-/+)pi(0) RID C-5223-2009 RID D-1055-2009
LUSIANI, Alberto;
2008
Abstract
We report a Dalitz-plot analysis of the charmless hadronic decays of neutral B mesons to K(+/-) pi(-/+) pi(0) With a sample of (231.8 +/- 2.6) x 10(6)Y(4S) -> B (B) over bar B decays collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC, we measure the magnitudes and phases of the intermediate resonant and nonresonant amplitudes for B(0) and (B) over bar (0) decays and determine the corresponding CP-averaged branching fractions and charge asymmetries. The inclusive branching fraction and CP-violating charge asymmetry are measured to be B(B(0) -> K(+) pi(-) pi(0)) = (35.7(-1.5)(+2.6) +/- 2.2) x 10(-6) and A(CP) -0.030(-0.051)(+0.045) +/- 0.055 where the first errors are statistical and the second systematic. We observe the decay B(0) -> K*(0)(892)pi(0) with the branching fraction B(B(0) -> K*(0)(892)pi(0)) = (3.6(-0.8)(+0.7) +/- 0.4) x 10(-6) This measurement differs from zero by 5.6 standard deviations (including the systematic uncertainties). The selected sample also contains B(0) -> (D) over bar (0) pi(0) decays where (D) over bar (0) -> K(+) pi(-), and we measure B(B(0) -> (D) over bar (0) pi(0)) = (2.93 +/- 0.17 +/- 0.18) x 10(-4).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
