We present a measurement of the time-dependent CP-violating asymmetries in neutral B decays to the π+π-CP eigenstate, and an updated measurement of the charge asymmetry in B0→K+π- decays. In a sample of 33 million Υ(4S)→BB̅ decays collected with the BABAR detector at the SLAC PEP-II asymmetric B factory, we find 65-11+12 π+π- and 217±18 K+π- candidates and measure the asymmetry parameters Sππ=0.03-0.56+0.53±0.11, Cππ=-0.25-0.47+0.45±0.14, and AKπ=-0.07±0.08±0.02, where the first error is statistical and the second is systematic.

Study of CP-violating asymmetries in B0→π+π-, K+π- decays

CONTRI, ROBERTO;LO VETERE, MAURIZIO;MONGE, MARIA ROBERTA;PATRIGNANI, CLAUDIA;ROBUTTI, ENRICO;SANTRONI, ALBERTO;TOSI, SILVANO;
2002-01-01

Abstract

We present a measurement of the time-dependent CP-violating asymmetries in neutral B decays to the π+π-CP eigenstate, and an updated measurement of the charge asymmetry in B0→K+π- decays. In a sample of 33 million Υ(4S)→BB̅ decays collected with the BABAR detector at the SLAC PEP-II asymmetric B factory, we find 65-11+12 π+π- and 217±18 K+π- candidates and measure the asymmetry parameters Sππ=0.03-0.56+0.53±0.11, Cππ=-0.25-0.47+0.45±0.14, and AKπ=-0.07±0.08±0.02, where the first error is statistical and the second is systematic.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11567/383926
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