Talk presented by Petrus Pennanen

Parallel Session: QCD Spectrum and Quark Masses III

Friday July 2nd, 14.50 - 15.10, Auditorium

Authors: UKQCD collaboration: P. Pennanen, C. Michael, A.M. Green

Interactions of heavy-light mesons

Abstract: The potential between static-light mesons forming a meson-meson or a meson-antimeson system is calculated in quenched and unquenched SU(3) gauge theory. We use lattices of size 16^3*24 with the Sheikholeslami-Wohlert action and statistical estimators of light quark propagators with maximal variance reduction. The dependence of the potentials on the light quark spin and isospin and the effect of meson exchange is investigated. Our main motivation is exploration of bound states of two mesons and string breaking. The latter also invo ves the two-quark potential and the correlation between two-quark and two-me on states. Some of the work is reported in C. Michael and P. Pennanen, "Two heavy-light mesons on a lattice", hep-lat/9901007.

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