Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
1995-08-02
Phys.Rev.D53:261-272,1996
Physics
High Energy Physics
High Energy Physics - Lattice
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Scientific paper
10.1103/PhysRevD.53.261
The energies of four-quark states are calculated for geometries in which the quarks are situated on the corners of a series of tetrahedra and also for geometries that correspond to gradually distorting these tetrahedra into a plane. The interest in tetrahedra arises because they are composed of {\bf three } degenerate partitions of the four quarks into two two-quark colour singlets. This is an extension of earlier work showing that geometries with {\bf two} degenerate partitions (e.g.\ squares) experience a large binding energy. It is now found that even larger binding energies do not result, but that for the tetrahedra the ground and first excited states become degenerate in energy. The calculation is carried out using SU(2) for static quarks in the quenched approximation with $\beta=2.4$ on a $16^3\times 32$ lattice. The results are analysed using the correlation matrix between different euclidean times and the implications of these results are discussed for a model based on two-quark potentials.
Green Mark A.
Lukkarinen Jani
Michael Carpentier
Pennanen Petrus
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