2,520 research outputs found
SU(3) quark-antiquark QCD flux tube
We compute the quark-antiquark flux tube for pure gauge SU(3) in space-time 3
+ 1 dimensions. To increase the signal over noise ratio, we apply the improved
multihit and extended smearing techniques. We fit the field densities with an
appropriate ansatz and we observe both the screening of the color fields and
the quantum widening of the flux tube in the mediator plane and in the charge
planes.Comment: 7 pages, 8 figures, poster presented at the 31st International
Symposium on Lattice Field Theory, July 29 - August 3, 2013, Mainz, German
Colour Fields Computed in SU(3) Lattice QCD for the Static Tetraquark System
The colour fields created by the static tetraquark system are computed in
quenched SU(3) lattice QCD, in a 24^3 x 48 lattice at beta=6.2 corresponding to
a lattice spacing a=0.07261(85) fm. We find that the tetraquark colour fields
are well described by a double-Y, or butterfly, shaped flux tube. The two flux
tube junction points are compatible with Fermat points minimizing the total
flux tube length. We also compare the diquark-diantiquark central flux tube
profile in the tetraquark with the quark-antiquark fundamental flux tube
profile in the meson, and they match, thus showing that the tetraquark flux
tubes are composed of fundamental flux tubes.Comment: 5 pages, 7 figures, 0 tables, one reference added, work done partly
under the PT-LQCD Collaboratio
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