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Measurement of branching fraction and CP asymmetry in B+ --->rho+ pi0

Collaboration
•
Jun, 2004
5 pages
Published in:
  • Phys.Rev.Lett. 94 (2005) 031801
e-Print:
DOI:
Report number:
  • BELLE-PREPRINT-2004-15,
  • KEK-PREPRINT-2004-19
Experiments:
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Abstract:
We report a measurement of the branching fraction for the decay B+→ρ+π0B^+ \to \rho^+\pi^0 based on a 140 fb−1{\rm fb}^{-1} data sample collected with the Belle detector at the KEKB asymmetric e+e−e^+e^- collider. We measure the branching fraction B(B+→ρ+π0)=(13.2±2.3(stat.)−1.9+1.4(sys.))×10−6{\cal B}(B^+ \to \rho^+\pi^0)=(13.2\pm 2.3({\rm stat.})^{+1.4}_{-1.9}({\rm sys.}))\times 10^{-6}, and the CP-violating asymmetry ACP(B∓→ρ∓π0)=0.06±0.19(stat.)−0.06+0.04(sys.){\cal A}_{CP}(B^\mp \to \rho^\mp\pi^0)=0.06\pm0.19({\rm stat.})^{+0.04}_{-0.06}({\rm sys.}).
  • 14.40.Nd
  • 11.30.Er
  • 13.25.Hw
  • B mesons
  • meson hadronic decay
  • CP invariance
  • pion production
  • electron positron: colliding beams
  • electron positron: inclusive reaction
  • Upsilon(10570): electroproduction