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Constraining the CKM Parameters using CP Violation in semi-leptonic B Decays

Robert N. Cahn, Mihir P. Worah

hep-pharXiv:hep-ph/9904480

Abstract

We discuss the usefulness of the CP violating semi-leptonic asymmetry aSL not only as a signal of new physics, but also as a tool in constraining the CKM parameters. We show that this technique could yield useful results in the first years of running at the B factories. We present the analysis graphically in terms of M12, the dispersive part of the B-Bbar mixing amplitude. This is complementary to the usual unitarity triangle representation and often allows a cleaner interpretation of the data.

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