Search for direct CP violation in B→Kπ decays

Belle Collaboration

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

We search for direct CP violation in flavor specific B → Kπ decays by measuring the rate asymmetry between charge conjugate modes. The search is performed on a data sample of 11.1 × 106 BB events recorded on the Y(4S) resonance by the Belle experiment at KEKB. We measure 90% confidence intervals in the partial rate asymmetry ACP of -0.25<ACP(Kπ±)<0.37, -0.40<ACP(Kπ0)<0.36, and -0.53 <A CP (K0π)<0.82. By combining the Kπ± and Kπ0 final states, we conclude that -0.22 <ACP(K± + π0))<0.25 at the 90% confidence level.

Original languageEnglish
Article number071101
JournalPhysical Review D
Volume64
Issue number7
DOIs
Publication statusPublished - 2001 Jan 1
Externally publishedYes

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CP violation
confidence
asymmetry
decay
intervals

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

Cite this

Search for direct CP violation in B→Kπ decays. / Belle Collaboration.

In: Physical Review D, Vol. 64, No. 7, 071101, 01.01.2001.

Research output: Contribution to journalArticle

Belle Collaboration. / Search for direct CP violation in B→Kπ decays. In: Physical Review D. 2001 ; Vol. 64, No. 7.
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abstract = "We search for direct CP violation in flavor specific B → Kπ decays by measuring the rate asymmetry between charge conjugate modes. The search is performed on a data sample of 11.1 × 106 BB events recorded on the Y(4S) resonance by the Belle experiment at KEKB. We measure 90{\%} confidence intervals in the partial rate asymmetry ACP of -0.25<ACP(K∓π±)<0.37, -0.40<ACP(K∓π0)<0.36, and -0.53 <A CP (K0π∓)<0.82. By combining the K∓π± and K∓π0 final states, we conclude that -0.22 <ACP(K∓(π± + π0))<0.25 at the 90{\%} confidence level.",
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AU - Belle Collaboration

AU - Abe, K.

AU - Abe, K.

AU - Abe, R.

AU - Adachi, I.

AU - Ahn, Byoung Sup

AU - Aihara, H.

AU - Akatsu, M.

AU - Asano, Y.

AU - Aso, T.

AU - Aulchenko, V.

AU - Aushev, T.

AU - Bakich, A. M.

AU - Banas, E.

AU - Behari, S.

AU - Behera, P. K.

AU - Bondar, A.

AU - Bozek, A.

AU - Browder, T. E.

AU - Casey, B. C.K.

AU - Chang, P.

AU - Chao, Y.

AU - Chen, K. F.

AU - Cheon, B. G.

AU - Chistov, R.

AU - Choi, S. K.

AU - Choi, Y.

AU - Dong, L. Y.

AU - Dragic, J.

AU - Drutskoy, A.

AU - Eidelman, S.

AU - Enomoto, R.

AU - Fang, F.

AU - Fujii, H.

AU - Fukunaga, C.

AU - Fukushima, M.

AU - Garmash, A.

AU - Gordon, A.

AU - Gotow, K.

AU - Guo, R.

AU - Haba, J.

AU - Hamasaki, H.

AU - Hanagaki, K.

AU - Handa, F.

AU - Hara, K.

AU - Hara, T.

AU - Hastings, N. C.

AU - Hayashii, H.

AU - Hazumi, M.

AU - Heenan, E. M.

AU - Won, Eunil

PY - 2001/1/1

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N2 - We search for direct CP violation in flavor specific B → Kπ decays by measuring the rate asymmetry between charge conjugate modes. The search is performed on a data sample of 11.1 × 106 BB events recorded on the Y(4S) resonance by the Belle experiment at KEKB. We measure 90% confidence intervals in the partial rate asymmetry ACP of -0.25<ACP(K∓π±)<0.37, -0.40<ACP(K∓π0)<0.36, and -0.53 <A CP (K0π∓)<0.82. By combining the K∓π± and K∓π0 final states, we conclude that -0.22 <ACP(K∓(π± + π0))<0.25 at the 90% confidence level.

AB - We search for direct CP violation in flavor specific B → Kπ decays by measuring the rate asymmetry between charge conjugate modes. The search is performed on a data sample of 11.1 × 106 BB events recorded on the Y(4S) resonance by the Belle experiment at KEKB. We measure 90% confidence intervals in the partial rate asymmetry ACP of -0.25<ACP(K∓π±)<0.37, -0.40<ACP(K∓π0)<0.36, and -0.53 <A CP (K0π∓)<0.82. By combining the K∓π± and K∓π0 final states, we conclude that -0.22 <ACP(K∓(π± + π0))<0.25 at the 90% confidence level.

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