Wilson-like fermions and the static B_B parameter with no chirality breaking mixings

Details Wilson-like fermions and the static B_B parameter with no chirality breaking mixings Wilson-like fermions and the static B_B parameter with no chirality breaking mixings

2004-09-02

arxiv.org/abs/hep-lat/0409012v1

Physics

High Energy Physics

High Energy Physics - Lattice

3 pages, talk given at Lattice2004(heavy), Fermilab, June 21-26, 2004

Scientific paper

10.1016/j.nuclphysbps.2004.11.34

I consider the recent proposal by R. Frezzotti and G. Rossi to chirally improve Wilson fermions in such a way that mixings among operators of different chirality can be excluded. The method, which is based on the use of twisted mass QCD with several replica of valence quarks, is extended here to static-light systems. The operators relevant for the computation of the B_B parameter (in the static approximation) are discussed. In this case the same renormalization pattern as for Ginsparg-Wilson fermions is obtained by a simple modification of the discretization of the action for valence quarks.

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