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
MARGONI, MARTINO;SIMONETTO, FRANCO;STROILI, ROBERTO;SIMI, GABRIELE;
2002
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.File in questo prodotto:
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