Simultaneous measurement of the meson lifetime and mixing frequency with decays
Collaboration
23 pages
Published in:
- Phys.Rev.D 67 (2003) 072002
e-Print:
- hep-ex/0212017 [hep-ex]
PDG: =
Report number:
- SLAC-PUB-9579,
- BABAR-PUB-02-012
Experiments:
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Citations per year
Abstract:
We measure the B0 lifetime \tau_{B0} and the B0-B0bar oscillation frequency \Delta m_d with a sample of approximately 14,000 exclusively reconstructed B0 --> D*- l+ nu signal events, selected from 23 million BBbar pairs recorded at the \Upsilon(4S) resonance with the BABAR detector at the Stanford Linear Accelerator Center. The decay position of the other B is determined with the remaining tracks in the event, and its b-quark flavor at the time of decay is determined with a tagging algorithm that exploits the correlation between the flavor of the b-quark and the charges of its decay products. The lifetime and oscillation frequency are measured simultaneously with an unbinned maximum-likelihood fit that uses, for each event, the measured difference in decay times of the two B mesons (\Delta t), the calculated uncertainty on \Delta t, the signal and background probabilities, and b-quark tagging information for the other B. The results are \tau_{B^0} = (1.523^{+0.024}_{-0.023} \pm 0.022) \rm{ps} and \Delta m_d = (0.492 \pm 0.018 \pm 0.013) \rm{ps}^{-1}. The statistical correlation coefficient between \tau_{B0} and \Delta m_d is -0.22.- 11.30.Er
- 14.40.Nd
- 12.15.Hh
- 13.25.Hw
- electron positron: colliding beams
- electron positron: annihilation
- Upsilon(10570): electroproduction
- B: pair production
- B0: semileptonic decay
- D*(2010)
References(10)
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