Evidence for direct CP violation in B ±→ηh ± and observation of B0→ηK0

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/104636

Title:	Evidence for direct CP violation in B ±→ηh ± and observation of B0→ηK0
Authors:	陳鎰鋒;Hoi, C.-T.;Chang, P.;Asner, D. M.;Aushev, T.;Bakich, A. M.;Belous, K.;Bischofberger, M.;Bondar, A.;Bozek, A.;Bračko, M.;Browder, T. E.;Chang, M.-C.;Chen, A.;Chen, K.-F.;Chen, P.;Cheon, B. G.;Chilikin, K.;Cho, K.;Choi, Y.;Danilov, M.;Drásal, Z.;Fast, J. E.;Gaur, V.;Gabyshev, N.;Goh, Y. M.;Haba, J.;Hayasaka, K.;Hoshi, Y.;Hou, W.-S.;Hsiung, Y. B.;Inami, K.;Iwabuchi, M.;Iwasaki, Y.;Kang, J. H.;Kawasaki, T.;Kim, H. J.;Kim, H. O.;Kim, J. B.;Kim, K. T.;Kim, M. J.;Kinoshita, K.;Ko, B. R.;Kobayashi, N.;Kodyš, P.;Korpar, S.;Križan, P.;Kuhr, T.;Kumita, T.;Kwon, Y.-J.;Lee, S.-H.;Li, J.;Libby, J.;Liu, Z. Q.;Matvienko, D.;McOnie, S.;Miyabayashi, K.;Mohanty, G. B.;Moll, A.;Nakao, M.;Neubauer, S.;Nishida, S.;Nishimura, K.;Nitoh, O.;Ohshima, T.;Okuno, S.;Park, C. W.;Park, H. K.;Pedlar, T. K.;Pestotnik, R.;Petrič, M.;Piilonen, L. E.;Ritter, M.;Röhrken, M.;Sakai, Y.;Sanuki, T.;Schneider, O.;Schwanda, C.;Senyo, K.;Sevior, M. E.;Shapkin, M.;Shebalin, V.;Shibata, T.-A.;Shiu, J.-G.;Simon, F.;Starič, M.;Tanaka, S.;Teramoto, Y.;Uchida, M.;Uglov, T.;Unno, Y.;Varner, G.;Wang, C. H.;Wang, P.;Watanabe, Y.;Williams, K. M.;Won, E.;Yamashita, Y.;Yusa, Y.;Zhilich, V.;Zupanc, A.
Contributors:	理學院物理學系
Keywords:	Elementary Particles;Monte Carlo Method;Uncertainty
Date:	2012-01-20
Issue Date:	2026-04-23 11:54:20 (UTC+8)
Publisher:	American Physical Society;United States: American Physical Society (APS)
Abstract:	摘要： We report measurements of the branching fractions and CP asymmetries for B(±)→ηh(±) (h=K or π) and the observation of the decay B(0)→ηK(0) from the final data sample of 772×10(6) B ̅B pairs collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The measured branching fractions are B(B(±)→ηK(±))=(2.12±0.23±0.11)×10(-6), B(B(±)→ηπ(±))=(4.07±0.26±0.21)×10(-6), and B(B(0)→ηK(0))=(1.27(-0.29)(+0.33)±0.08)×10(-6), where the last decay is observed for the first time with a significance of 5.4 standard deviations (σ). We also find evidence for CP violation in the charged B modes, A(CP)(B(±)→ηK(±))=-0.38±0.11±0.01 and A(CP)(B(±)→ηπ(±))=-0.19±0.06±0.01 with significances of 3.8 σ and 3.0 σ, respectively. For all measurements, the first and second uncertainties are statistical and systematic, respectively. 其他題名： Phys Rev Lett 出版者： United States: American Physical Society (APS) 出版日期： 2012-01-20 出處： Physical Review Letters, 2012-01, Vol.108 (3), p.031801, Article 031801 資源來源： American Physical Society Journals 版權： 2012 American Physical Society 識別號： ISSN: 0031-9007 識別號： ISSN: 1079-7114 識別號： EISSN: 1079-7114 識別號： DOI: 10.1103/PhysRevLett.108.031801 識別號： PMID: 22400727
Appears in Collections:	[Department of Physics] journal & Dissertation

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