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Measurement of the B0B^0 meson lifetime with partial reconstruction of B0→D∗−π+B^0 \to D^{*-} \pi^+ and B0→D∗−ρ+B^0 \to D^{*-} \rho^+ decays

Collaboration
Dec, 2002
8 pages
Published in:
  • Phys.Rev.D 67 (2003) 091101
e-Print:
DOI:
Report number:
  • SLAC-PUB-9602,
  • BABAR-PUB-02-013
Experiments:
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Abstract:
The neutral BB meson lifetime is measured with the data collected by the BaBar detector at the PEP-II storage ring during the years 1999 and 2000, with a total integrated luminosity of 20.7 fb−1{\rm fb}^{-1}. The decays B0→D∗−π+B^0 \to D^{*-} \pi^+ and B0→D∗−ρ+B^0 \to D^{*-} \rho^+ are selected with a partial-reconstruction technique, yielding samples of 6970±2406970 \pm 240 and 5520±2505520 \pm 250 signal events, respectively. With these events, the B0B^0 lifetime is measured to be 1.533±0.034(stat.)±0.038(syst.)ps 1.533 \pm 0.034 {\rm (stat.)} \pm 0.038 {\rm (syst.)} {\rm ps}. This measurement serves as a test and validation of procedures required to measure the CP violation parameter sin⁡(2β+γ)\sin(2\beta + \gamma) with partial reconstruction of these modes.
  • 12.15.Hh
  • 11.30.Er
  • 13.25.Hw
  • electron positron: colliding beams
  • electron positron: annihilation
  • Upsilon(10570): electroproduction
  • B: pair production
  • B0: hadronic decay
  • D*(2010)
  • rho(770)+: hadronic decay