Mesurement of the B0 - anti-B0 Mixing Parameter Delta m_d using Semileptonic B0 Decays

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^+νdecay 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.

arXiv comment10 pages, 3 figures, Published in Phys.Rev.Lett. 89, 251803 (2002)

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Cited by in corpus (8)

• Neutral B Flavor Tagging for the Measurement of Mixing-induced CP Violation at Belle
• Improved Measurement of CP-Violation Parameters sin(2phi1) and |lambda|, B Meson Lifetimes, and B0-B0bar Mixing Parameter Delta m_d
• Observation of Bell Inequality violation in B mesons
• Measurement of EPR-type flavour entanglement in Upsilon(4S)->B0 B0bar decays
• Studies of B0-B0bar Mixing Properties with Inclusive Dilepton Events
• Limits on the Decay-Rate Difference of Neutral B Mesons and on CP, T, and CPT Violation in B0-B0bar Oscillations
• Non-relativistic neutrinos and the weak equivalence principle apparent violation
• Recent measurements of CP violation at the B factories