Journal article

Measurement of the time-dependent CP-violating asymmetry in B-0 -> K-S(0)pi(0)gamma decays

Y Ushiroda, K Sumisawa, M Hazumi, K Abe, K Abe, I Adachi, H Aihara, Y Asano, V Aulchenko, T Aushev, AM Bakich, A Bay, I Bedny, U Bitenc, I Bizjak, S Blyth, A Bondar, A Bozek, M Bracko, J Brodzicka Show all

PHYSICAL REVIEW LETTERS | AMER PHYSICAL SOC | Published : 2005

Abstract

We present a new measurement of CP-violation parameters in B(0)-->K(0)(S)pi(0)gamma decay based on a sample of 275 x 10(6) BB pairs collected at the Gamma(4S) resonance with the Belle detector at the KEKB energy-asymmetric e(+)e(-) collider. One of the B mesons is fully reconstructed in the B(0)-->K(0)(S)pi(0)gamma decay. The flavor of the accompanying B meson is identified from its decay products. CP-violation parameters are obtained from the asymmetry in the distribution of the proper time intervals between the two B decays. We obtain SK(0)(S)(pi(0)gamma) = -0.58(+0.46)(-0.38)(stat) +/- 0.11(syst) and AK(0)(S)(pi(0)gamma) = +0.03 +/- 0.34(stat) +/- 0.11(syst), for the K(0)(S)pi(0) invarian..

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