Improved measurement of the partial rate CP asymmetry in B+ ---> K0 pi+ and B- ---> anti-K0 pi- decays
Collaboration
7 pages
Published in:
- Phys.Rev.D 68 (2003) 011103
e-Print:
- hep-ex/0304035 [hep-ex]
PDG: )
Report number:
- KEK-PREPRINT-2003-7,
- BELLE-PREPRINT-2003-4
Experiments:
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Abstract:
We report an improved measurement of the partial-rate CP asymmetry in B+ => K0pi+ and B- => K0bar pi- decays. The analysis is based on a data sample of 85 million BBbar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB e+ e- storage ring. We measure Acp(K0pi+-) = 0.07^{+0.09 +0.01}_{-0.08 -0.03}, where the first and second errors are statistical and systematic, respectively: the corresponding 90% confidence-level interval is -0.10 < Acp(K0pi+-) < 0.22 .- 12.15.Hh
- 11.30.Er
- 13.25.Hw
- 14.40.Nd
- electron positron: colliding beams
- electron positron: annihilation
- Upsilon(10570): electroproduction
- B: pair production
- B+: hadronic decay
- B-: hadronic decay
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