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Measurement of branching fractions and charge asymmetries in B±→ρ±π0B^\pm \to \rho^\pm \pi^0 and B±→ρ0π±B^\pm \to \rho^0 \pi^\pm decays, and search for B0→ρ0π0B^0 \to \rho^0 \pi^0

Collaboration
Nov, 2003
7 pages
Published in:
  • Phys.Rev.Lett. 93 (2004) 051802
e-Print:
DOI:
Report number:
  • SLAC-PUB-10236,
  • BABAR-PUB-03-037
Experiments:
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Abstract:
We present measurements of branching fractions and charge asymmetries in BB-meson decays to ρ+π0\rho^+ \pi^{0}, ρ0π+\rho^{0}\pi^+ and ρ0π0\rho^0\pi^0. The data sample comprises 89×10689 \times 10^6 Υ(4S)→BBˉ\Upsilon(4S) \to B\bar{B} decays collected with the BaBarBaBar detector at the PEP-II asymmetric-energy BB Factory at SLAC. We find the charge-averaged branching fractions B(B+→ρ+π0)=(10.9±1.9(stat)±1.9(syst))×10−6{\cal B}(B^{+}\to \rho^{+}\pi^0) = (10.9 \pm 1.9{\rm (stat)} \pm 1.9{\rm (syst)})\times 10^{-6} and B(B+→ρ0π+)=(9.5±1.1(stat)±0.8(syst))×10−6{\cal B}(B^{+} \to \rho^0 \pi^{+}) = (9.5 \pm 1.1{\rm (stat)} \pm 0.8{\rm (syst)}) \times 10^{-6}, and we set a 90% confidence-level upper limit B(B0→ρ0π0)<2.9×10−6{\cal B}(B^0 \to \rho^0\pi^0) < 2.9 \times 10^{-6}. We measure the charge asymmetries ACPρ+π0=0.24±0.16±0.06A_{CP}^{\rho^{+}\pi^0} = 0.24 \pm 0.16 \pm 0.06 and ACPρ0π+=−0.19±0.11±0.02A_{CP}^{\rho^0\pi^{+}} = -0.19 \pm 0.11 \pm 0.02.
  • 11.30.Er
  • 12.15.Hh
  • 13.25.Hw
  • conservation laws
  • CP invariance
  • B mesons
  • meson hadronic decay
  • electron positron: colliding beams
  • electron positron: annihilation
  • Upsilon(10570): electroproduction