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Measurement of the [Formula presented] Mixing Parameter [Formula presented] using Semileptonic [Formula presented] Decays
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Measurement of the [Formula presented] Mixing Parameter [Formula presented] using Semileptonic [Formula presented] Decays

K. Hara, M. Hazumi, K. Abe, K. Abe, T. Abe, I. Adachi, Byoung Sup Ahn, H. Aihara, M. Akatsu, Y. Asano, …
Physical Review Letters, 卷.89(25)
2002

摘要

Physics and Astronomy (all)
We present a measurement of the [Formula presented] mixing parameter [Formula presented] using neutral [Formula presented] meson pairs in a [Formula presented] data sample collected at the [Formula presented] resonance with the Belle detector at the KEKB asymmetric-energy [Formula presented] collider. We exclusively reconstruct one neutral [Formula presented] meson in the semileptonic [Formula presented] decay mode and identify the flavor of the accompanying [Formula presented] meson from its decay products. From the distribution of the time intervals between the two flavor-tagged [Formula presented] meson decay points, we obtain [Formula presented], where the first error is statistical and the second error is systematic. © 2002 The American Physical Society.

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