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

  • Ushiroda, Y
  • Sumisawa, K
  • Hazumi, M
  • Abe, K
  • Abe, K
  • Adachi, I
  • Aihara, H
  • Asano, Y
  • Aulchenko, V
  • Aushev, T
  • Bakich, AM
  • Bay, A
  • Bedny, I
  • Bitenc, U
  • Bizjak, I
  • Blyth, S
  • Bondar, A
  • Bozek, A
  • Bracko, M
  • Brodzicka, J
  • Browder, TE
  • Chang, MC
  • Chang, P
  • Chao, Y
  • Chen, A
  • Chen, KF
  • Chen, WT
  • Cheon, BG
  • Choi, SK
  • Choi, Y
  • Chuvikov, A
  • Cole, S
  • Dalseno, J
  • Danilov, M
  • Dash, M
  • Dragic, J
  • Eidelman, S
  • Fang, F
  • Fratina, S
  • Gabyshev, N
  • Gershon, T
  • Gokhroo, G
  • Gorisek, A
  • Haba, J
  • Hara, K
  • Hastings, NC
  • Hayasaka, K
  • Hayashii, H
  • Higuchi, T
  • Hinz, L
  • Hokuue, T
  • Hosh
Publication date
January 2005
Publisher
物理评论快报
Journal
0031-9007

Abstract

We present a new measurement of CP-violation parameters in B-0-> K(S)(0)pi(0)gamma decay based on a sample of 275x10(6) B (B) over bar pairs collected at the Upsilon(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(S)(0)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 S(KS)(0)pi(0)gamma=-0.58(-0.38)(+0.46)(stat)+/- 0.11(syst) and A(KS)(0)pi(0)gamma=+0.03 +/- 0.34(stat)+/- 0.11(syst), for the K(S)(0)pi(0) invariant mass covering the full range up to 1.8 GeV...

Extracted data

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