Measurement of the Branching Fraction for B->eta' K and Search for B->eta'pi+

Details Measurement of the Branching Fraction for B->eta' K and Search for B->eta'pi+ Measurement of the Branching Fraction for B->eta' K and Search for B->eta'pi+

2001-08-06

arxiv.org/abs/hep-ex/0108010v1

Phys.Lett.B517:309-318,2001

Physics

High Energy Physics

High Energy Physics - Experiment

Submitted to Physics Letters B

Scientific paper

10.1016/S0370-2693(01)01025-5

We report measurements for two-body charmless B decays with an eta' meson in the final state. Using 11.1X10^6 BBbar pairs collected with the Belle detector, we find BF(B^+ ->eta'K^+)=(79^+12_-11 +-9)x10^-6 and BF(B^0 -> eta'K^0)=(55^+19_-16 +-8)x10^-6, where the first and second errors are statistical and systematic, respectively. No signal is observed in the mode B^+ -> eta' pi^+, and we set a 90% confidence level upper limit of BF(B^+-> eta'pi^+) < 7x10^-6. The CP asymmetry in B^+- -> eta'K^+- decays is investigated and a limit at 90% confidence level of -0.20

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