Bonn 2010 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 26: Gittereichtheorie II

T 26.1: Vortrag

Dienstag, 16. März 2010, 16:45–17:00, HG XIII

Hypercubic-symmetry breaking from minimally doubled fermion actions — •Johannes Weber, Hartmut Wittig, and Stefano Capitani — Institut für Kernphysik, Johannes Gutenberg Universität Mainz, Deutschland

The naively discretised Dirac operator exhibits multiple zero modes distributed across the Brillouin zone. Their number must be reduced in order to identify them with the fermionic degrees of freedom of QCD.

Minimal doubling of lattice fermions requires the introduction of an explicit hypercubic-symmetry-breaking scale. Two prominent examples are Borici-Creutz and Karsten-Wilczek fermions.

These approaches affect the renormalisation properties of fermionic observables as well as the renormalisation properties of the QCD vacuum.

An analysis of the structure of the one-loop renormalisation at the quark level is used to conjecture the properties of hadronic correlation functions.

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