期刊
PHYSICAL REVIEW D
卷 84, 期 5, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.84.054508
关键词
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资金
- FCT [PTDC/FIS/100968/2008, CERN/FP/109327/2009, CERN/FP/116383/2010, SFRH/BD/44416/2008.]
- Fundação para a Ciência e a Tecnologia [CERN/FP/109327/2009, SFRH/BD/44416/2008, CERN/FP/116383/2010] Funding Source: FCT
The color 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 color 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.
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