Study of high momentum eta' production in B -> eta' X_s

Details Study of high momentum eta' production in B -> eta' X_s Study of high momentum eta' production in B -> eta' X_s

2004-01-08

arxiv.org/abs/hep-ex/0401006v1

Phys.Rev.Lett.93:061801,2004

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages, 13 figures, submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.93.061801

We measure the branching fraction for the charmless semi-inclusive process B -> eta' X_s, where the eta' meson has a momentum in the range 2.0 to 2.7 GeV/c in the Upsilon(4S) center-of-mass frame and X_s represents a system comprising a kaon and zero to four pions. We find B(B -> eta' X_s)=(3.9+/-0.8(stat)+/-0.5(syst)+/-0.8(model)).10^{-4}. We also obtain the X_s mass distribution and find that it tends to favor models predicting high masses.

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