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2015

Determining the QCD coupling from lattice vacuum polarization

Hudspith, Renwick J., Lewis, Randy, Maltman, Kim et al.

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Understand

The QCD coupling appears in the perturbative expansion of the current-current two-point (vacuum polarization) function.

Any lattice calculation of vacuum polarization is plagued by several competing non-perturbative effects at small momenta and by discretization errors at large momenta.
We work in an intermediate region, computing the vacuum polarization for many off-axis momentum directions on the lattice.
Having many momentum directions provides a way to monitor and account for lattice artifacts.

Determining the QCD coupling from lattice vacuum polarization · Around

Built on

P. A. Baikov, K. G. Chetyrkin and J. H. Kuhn, Phys. Rev. Lett. 101
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R. Arthur et al
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Then

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Later among the works it cites.
D. Boito, M. Golterman, K. Maltman, J. Osborne and S. Peris, Phys. Rev. D 91
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Closest in time.
D. Boito, M. Golterman, K. Maltman, J. Osborne and S. Peris, Nucl. Part. Phys. Proc. 260
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