Non-perturbative renormalisation of four-fermion operators in N_f=2 QCD

Details Non-perturbative renormalisation of four-fermion operators in N_f=2 QCD Non-perturbative renormalisation of four-fermion operators in N_f=2 QCD

2007-10-15

arxiv.org/abs/0710.2862v2

PoSLAT2007:368,2007

Physics

High Energy Physics

High Energy Physics - Lattice

7 pages, 2 figures, Proceedings from the XXV International Symposium on Lattice Field Theory, Regensburg, Germany Typos correc

Scientific paper

We present results for the non-perturbative renormalisation of four-fermion operators with two flavours of dynamical quarks. We consider both fully relativistic left current-left current operators, and a full basis for $\Delta B=2$ operators with static heavy quarks. The renormalisation group running of the operators to high energy scales is computed in the continuum limit for a family of Schroedinger Functional renormalisation schemes, via standard finite size scaling techniques. The total renormalisation factors relating renormalisation group invariant to bare operators are computed for a choice of lattice regularisations.

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