OPE Analysis of QCD Potential and Determination of ΛMS
Presenter: Yukinari Sumino
Y. Sumino
Abstract: We analyze the static QCD potential VQCD (r) in the distance region 0.1 fm < r < 1 fm. In the frame of operator-product expansion (OPE),
we compare numerically perturbative predictions of the leading Wilson coefficient and lattice computations of VQCD (r), assembling recent developments
of the computations. A very good agreement is observed. We perform fits
to simultaneously determine non-perturbative contribution to VQCD (r) and the
relation between Sommer scale and Λ3-loop
. As for the former quantity, we
MS
improve bounds as compared to the previous determination; as for the latter
quantity, our analysis provides a new method for its determination, where we
3-loop
= 0.574 ± 0.042.
find r0 ΛMS
1