20 91 00 v 1 1 0 Se p 20 02 1 The radial distributions of a heavy - light meson on a lattice
نویسنده
چکیده
A knowledge of the radial distributions of quarks inside hadrons could lead to a better understanding of the QCD description of these hadrons and possibly suggest forms for phenomenological models. As a step in this direction, we have measured the charge (vector) and matter (scalar) densities of a heavy-light meson. More explicitly, the heavy-light meson is simplified to being an infinitely heavy quark (Q) and an antiquark (q̄) with a mass approximately equal to that of the strange quark. The physical meson nearest to this idealised meson is the Bs(5.37 GeV). We consider two flavours of dynamical quarks (u and d).
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For a heavy-light meson with a static heavy quark, we can explore the light quark distribution. The charge and matter radial distributions of these heavylight mesons are measured on a 16 × 24 lattice at β = 5.7 and a hopping parameter corresponding to a light quark mass about that of the strange quark. Both distributions can be well fitted up to 4 lattice spacings (r ≈ 0.7 fm) with the exponent...
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تاریخ انتشار 2002