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QCD lambda parameter from gradient flow
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DOI：10.1140/epjc/s10052-025-14743-4.png)
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Abstract
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Starting from the running coupling in the gradient flow scheme, the QCD lambda parameter $$\Lambda _{\,\overline{\!\mathrm MS\!}\;}$$ is determined analytically with respect to the reference scale $$w_0$$ in the pure gauge theory. A key element is the gluon condensate, which, being invariant under RG transformations, establishes a formal relationship between $$\Lambda _{\,\overline{\!\mathrm MS\!}\;}$$ and $$w_0$$ . Good agreement with numerical estimates is found.
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