A Lattice Study of Spin and Flavour Symmetry in Heavy Quark Physics

Details A Lattice Study of Spin and Flavour Symmetry in Heavy Quark Physics A Lattice Study of Spin and Flavour Symmetry in Heavy Quark Physics

1993-11-24

arxiv.org/abs/hep-lat/9311038v1

Nucl.Phys.Proc.Suppl. 34 (1994) 489-491

Physics

High Energy Physics

High Energy Physics - Lattice

3 pages in uuencoded-compressed-PostScript format, to appear in the Proceedings of LATTICE 93, Dallas, USA; Edinburgh Preprint

Scientific paper

We present a first test of heavy quark spin-flavour symmetries in matrix
elements for semi-leptonic decays \bar B to D l\bar\nu and \bar B to D^*
l\bar\nu. We show that O(1/m_Q) corrections are small at masses around the
charm for form factors protected by Luke's Theorem, but are of order 30-40 \%
for h_V and h_V/h_{A_{1}}.

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