Measurements of branching fractions and time-dependent CP-violating asymmetries in B --> eta'K decays

We present measurements of the B --> eta(')K branching fractions; for B(+) --> eta(')K(+) we measure also the time-integrated charge asymmetry Alpha(ch), and for B(0) --> eta(')K(0)(S) the time-dependent CP-violation parameters S and C. The data sample corresponds to 232 x 10...

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Published in:Physical review letters 2005-05, Vol.94 (19), p.191802-191802
Main Authors: Aubert, B, Barate, R, Boutigny, D, Couderc, F, Karyotakis, Y, Lees, J P, Poireau, V, Tisserand, V, Zghiche, A, Grauges-Pous, E, Palano, A, Pompili, A, Chen, J C, Qi, N D, Rong, G, Wang, P, Zhu, Y S, Eigen, G, Ofte, I, Stugu, B, Abrams, G S, Borgland, A W, Breon, A B, Brown, D N, Button-Shafer, J, Cahn, R N, Charles, E, Day, C T, Gill, M S, Gritsan, A V, Groysman, Y, Jacobsen, R G, Kadel, R W, Kadyk, J, Kerth, L T, Kolomensky, Yu G, Kukartsev, G, Lynch, G, Mir, L M, Oddone, P J, Orimoto, T J, Pripstein, M, Roe, N A, Ronan, M T, Wenzel, W A, Barrett, M, Ford, K E, Harrison, T J, Hart, A J, Hawkes, C M, Morgan, S E, Watson, A T, Fritsch, M, Goetzen, K, Held, T, Koch, H, Lewandowski, B, Pelizaeus, M, Peters, K, Schroeder, T, Steinke, M, Boyd, J T, Burke, J P, Chevalier, N, Cottingham, W N, Kelly, M P, Latham, T E, Wilson, F F, Cuhadar-Donszelmann, T, Hearty, C, Knecht, N S, Mattison, T S, McKenna, J A, Thiessen, D, Khan, A, Kyberd, P, Teodorescu, L, Blinov, A E, Blinov, V E, Druzhinin, V P, Golubev, V B, Ivanchenko, V N, Kravchenko, E A, Onuchin, A P, Serednyakov, S I, Skovpen, Yu I, Solodov, E P, Yushkov, A N, Best, D, Bruinsma, M, Chao, M, Eschrich, I, Kirkby, D, Lankford, A J, Mandelkern, M, Mommsen, R K, Roethel, W, Stoker, D P, Buchanan, C, Hartfiel, B L
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Language:English
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Summary:We present measurements of the B --> eta(')K branching fractions; for B(+) --> eta(')K(+) we measure also the time-integrated charge asymmetry Alpha(ch), and for B(0) --> eta(')K(0)(S) the time-dependent CP-violation parameters S and C. The data sample corresponds to 232 x 10(6) BB pairs produced by e(+)e(-) annihilation at the Upsilon (4S). The results are Beta(B --> eta(')K(+)) = (68.9 +/- 2.0 +/- 3.2) x 10(-6), Beta(B(0) --> eta(')K(0)) = (67.4 +/- 3.2) x 10(-6), Alpha(ch) = 0.033 +/- 0.028 +/- 0.005, S = 0.30 +/- 0.140 +/- 0.02, and C = -0.21 +/- 0.10 +/- 0.02, where the first error quoted is statistical and the second is systematic.
ISSN:0031-9007