Four quark operators in maximally twisted Wilson LQCD

Details Four quark operators in maximally twisted Wilson LQCD Four quark operators in maximally twisted Wilson LQCD

2005-09-27

arxiv.org/abs/hep-lat/0509155v1

PoS LAT2005 (2005) 342

Physics

High Energy Physics

High Energy Physics - Lattice

6 pages, talk presented at Lattice 2005 (weak matrix elements), Dublin, July 25-30, 2005

Scientific paper

We discuss how the peculiar properties of maximally twisted Wilson fermions can be exploited to set up a consistent LQCD computational scheme in which the CP-conserving matrix elements of the $\Delta S =1,2$ effective weak Hamiltonian can be evaluated without mixing with wrong-chirality and/or -parity operators. The proposed lattice framework guarantees automatic O($a$) improvement and positive determinant also for pairs of non-degenerate quarks.

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