Continuous external momenta in non-perturbative lattice simulations: a computation of renormalization factors
| Autor: | Karl Jansen, I. Wetzorke, Andrea Shindler, M. Guagnelli, Filippo Palombi, Roberto Petronzio |
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| Rok vydání: | 2003 |
| Předmět: |
Physics
Quark Nuclear and High Energy Physics High Energy Physics::Lattice High Energy Physics - Lattice (hep-lat) Lattice field theory FOS: Physical sciences Renormalization group Renormalization High Energy Physics - Lattice Condensed Matter::Strongly Correlated Electrons Boundary value problem Quantum field theory Non-perturbative Scaling Mathematical physics |
| Zdroj: | Nuclear Physics B. 664:276-298 |
| ISSN: | 0550-3213 |
| Popis: | We discuss the usage of continuous external momenta for computing renormalization factors as needed to renormalize operator matrix elements. These kind of external momenta are encoded in special boundary conditions for the fermion fields. The method allows to compute certain renormalization factors on the lattice that would have been very difficult, if not impossible, to compute with standard methods. As a result we give the renormalization group invariant step scaling function for a twist-2 operator corresponding to the average momentum of non-singlet quark densities. Comment: 28 pages, 10 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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