Measurement of the B0 - anti-B0 mixing parameter Delta m(d) using semileptonic B0 decays
Collaboration
10 pages
Published in:
- Phys.Rev.Lett. 89 (2002) 251803
e-Print:
- hep-ex/0207045 [hep-ex]
PDG: =
Report number:
- KEK-PREPRINT-2002-69,
- BELLE-PREPRINT-2002-23
Experiments:
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Abstract:
We present a measurement of the B^0-B^0bar mixing parameter Delta m_d using neutral B meson pairs in a 29.1 fb^{-1} data sample collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e^+e^- collider. We exclusively reconstruct one neutral B meson in the semileptonic B^0 \to D^{*-}\ell^+\nu decay mode and identify the flavor of the accompanying B meson from its decay products. From the distribution of the time intervals between the two flavor-tagged B meson decay points, we obtain Delta m_d = (0.494 +- 0.012 +- 0.015) ps^{-1}, where the first error is statistical and the second error is systematic.Note:
- 10 pages, 3 figures, Published in Phys.Rev.Lett. 89, 251803 (2002) Journal-ref: Physical Review Letters 89, 251803 (2002)
- electron positron: colliding beams
- electron positron: annihilation
- Upsilon(10570): electroproduction
- B0: pair production
- B0: semileptonic decay
- B0 anti-B0: mixing
- B0: mass difference
- D*(2010)
- particle identification: flavor
- flavor: asymmetry
References(11)
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