Chiral expansion for lattice computations of B^{+} to D^{0}K^{+} (π^{+}) and B^{+} to Dbar^{0} K^{+} (π^{+}) amplitudes

Details Chiral expansion for lattice computations of B^{+} to D^{0}K^{+} (π^{+}) and B^{+} to Dbar^{0} K^{+} (π^{+}) amplitudes Chiral expansion for lattice computations of B^{+} to D^{0}K^{+} (π^{+}) and B^{+} to Dbar^{0} K^{+} (π^{+}) amplitudes

2011-11-25

arxiv.org/abs/1111.5891v1

PoS Lattice2011: 330, 2011

Physics

High Energy Physics

High Energy Physics - Lattice

7 pages, 2 figures. Poster, based on arXiv:1111.4686, presented at the XXIX International Symposium on Lattice Field Theory -

Scientific paper

In this work, we suggest that hard-pion chiral perturbation theory may be applicable to the real parts of nonleptonic B^{+} to D^{0}P^{+} and B^{+} to Dbar^{0}P^{+} (P=K,pi) decay amplitudes. These amplitudes play an important role in the extraction of the angle gamma in the b-d unitarity triangle of the CKM matrix, and their real parts can be computed using lattice QCD. We construct the leading-order operator in the chiral expansion for these nonleptonic decays, and discuss the generic features of the next-to-leading-order terms.

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