Elsevier

Physics Letters B

Volume 280, Issues 3–4, 30 April 1992, Pages 287-291
Physics Letters B

Union of chiral and heavy quark symmetries

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Abstract

We describe the chiral symmetric couplings of pions to heavy mesons (B or D), valid in the portion of phase space where the pions have low momentum. In order to include consistently all low energy excitations, the vector mesons (B or D) must appear explicitly in the effective lagrangian. The result is then invariant under both the chiral and heavy quark symmetries. We include matrix elements relevant for various weak decays.

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This work was supported in part by the US National Science Foundation. J.F.D. thanks the theory group at CERN for hospitality at the start of this project.

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