Two-body B meson decays to eta and eta('): observation of B --> eta K

In a sample of 19 x 10(6) produced B mesons, we have observed the decays B-->eta K(*) and improved our previous measurements of B-->eta'K. The branching fractions we measure for these decay modes are B(B+-->eta K(*+)) = (26.4(+9.6)(-8.2)+/-3.3)x10(-6), B(B(0)-->eta K(*0)) = (13.8(+5...

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Veröffentlicht in:	Physical review letters 2000-07, Vol.85 (3), p.520-524
Hauptverfasser:	Richichi, S J, Severini, H, Skubic, P, Undrus, A, Chen, S, Fast, J, Hinson, J W, Lee, J, Menon, N, Miller, D H, Shibata, E I, Shipsey, I P, Pavlunin, V, Cronin-Hennessey, D, Kwon, Y, Lyon, A L, Thorndike, E H, Jessop, C P, Marsiske, H, Perl, M L, Savinov, V, Ugolini, D, Zhou, X, Coan, T E, Fadeyev, V, Maravin, Y, Narsky, I, Stroynowski, R, Ye, J, Wlodek, T, Artuso, M, Ayad, R, Boulahouache, C, Bukin, K, Dambasuren, E, Karamnov, S, Kopp, S, Majumder, G, Moneti, G C, Mountain, R, Schuh, S, Skwarnicki, T, Stone, S, Viehauser, G, Wang, J C, Wolf, A, Wu, J, Csorna, S E, Danko, I, Zhou, G J
Format:	Artikel
Sprache:	eng
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Zusammenfassung:	In a sample of 19 x 10(6) produced B mesons, we have observed the decays B-->eta K() and improved our previous measurements of B-->eta'K. The branching fractions we measure for these decay modes are B(B+-->eta K(+)) = (26.4(+9.6)(-8.2)+/-3.3)x10(-6), B(B(0)-->eta K(*0)) = (13.8(+5.5)(-4.6)+/-1.6)x10(-6), B(B(+)-->eta'K(+) = (80(+10)(-9)+/-7)x10(-6), and B(B(0)-->eta'K0) = (89(+18)(-16)+/-9)x10(-6). We have searched with comparable sensitivity for related decays and report upper limits for these branching fractions.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.85.520