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Study of high momentum eta' production in B --> eta'Xs |
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| Authors: | Aubert B Barate R Boutigny D Couderc F Gaillard J-M Hicheur A Karyotakis Y Lees J P Tisserand V Zghiche A 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 LeClerc C Levi M E Lynch G Mir L M Oddone P J Orimoto T J Pripstein M Roe N A Ronan M T Shelkov V G Telnov A V Wenzel W A Ford K Harrison T J Hawkes C M Morgan S E Watson A T Watson N K Fritsch M Goetzen K Held T Koch H |
| Affiliation: | Laboratoire de Physique des Particules, F-74941 Annecy-le-Vieux, France. |
| Abstract: | We measure the branching fraction for the charmless semi-inclusive process B --> eta'Xs, where the eta' meson has a momentum in the range 2.0 to 2.7 GeV/c in the upsilon4S center-of-mass frame and Xs represents a system comprising a kaon and zero to four pions. We find B(B --> eta'Xs) = 3.9 +/- 0.8(stat) +/- 0.5(syst) +/- 0.8(model)] x 10(-4). We also obtain the Xs mass spectrum and find that it fits models predicting high masses. |
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