Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2009-12-16
Phys.Rev.D81:034504,2010
Physics
High Energy Physics
High Energy Physics - Lattice
7 pages, 10 figures
Scientific paper
10.1103/PhysRevD.81.034504
The chromoelectric and chromomagnetic fields, created by a static gluon-quark-antiquark system, are computed in quenched SU(3) lattice QCD, in a $24^3\times 48$ lattice at $\beta=6.2$ and $a=0.07261(85) fm$. We compute the hybrid Wilson Loop with two spatial geometries, one with a U shape and another with an L shape. The particular cases of the two gluon glueball and quark-antiquark are also studied, and the Casimir scaling is investigated in a microscopic perspective. This microscopic study of the colour fields is relevant to understand the structure of hadrons, in particular of the hybrid excitation of mesons. This also contributes to understand confinement with flux tubes and to discriminate between the models of fundamental versus adjoint confining strings, analogous to type-II and type-I superconductivity.
Bicudo Pedro
Cardoso Marco
Cardoso Nuno
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