Determination of ΛMS from the static quark-antiquark potential in momentum space
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Ju l 2 01 4 Λ ( n f = 2 ) MS from a momentum space analysis of the quark - antiquark static potential
We determine Λ (nf=2) MS by fitting perturbative expressions for the quark-antiquark static potential to lattice results for QCD with nf = 2 dynamical quark flavors. To this end we use the perturbative static potential at the presently best known accuracy, i.e. up to O(αs), in momentum space. The lattice potential is computed on a fine lattice with a ≈ 0.042 fm in position space. To allow for a...
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Meson is composed of one quark and one antiquark moving under the effect of confinement, oscillating and color potentials. Since quarks are particles with spin , there is a spin-spin interaction potential. Also we have isospins for u and d quarks and we can consider related potentials on isospin-isospin and spin-isospin effects. By comparing the given meson spectrum with the amount calculated...
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In most models, mesons consist of quark -antiquark pairs moving in a confining potential. However, it would be interesting to consider the effect of an extra residual interaction by introducing the quark particles which contain a dependent spin and isospin. In the Chiral constituent quark model, the hyperfine part of the potential is provided by the interaction of the Goldstone bosons, which ...
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