# Study of high momentum $\eta'$ production in $B \to \{eta'} X_s$

Abstract : 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.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00023333
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Submitted on : Tuesday, November 23, 2004 - 5:01:11 PM
Last modification on : Friday, October 8, 2021 - 10:20:02 AM

### Citation

B. Aubert, R. Barate, D. Boutigny, F. Couderc, J.M. Gaillard, et al.. Study of high momentum $\eta'$ production in $B \to \{eta'} X_s$. Physical Review Letters, American Physical Society, 2004, 93, pp.061801. ⟨10.1103/PhysRevLett.93.061801⟩. ⟨in2p3-00023333⟩

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