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Non-perturbative renormalisation of four fermion operators and B-bar B mixing with Wilson fermions

D. Becirevic·V. Gimenez·V. Lubicz·G. Martinelli·M. Papinutto·J. Reyes
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Abstract

We present new results for the renormalisation and subtraction constants for the four fermion Delta F=2 operators, computed non-perturbatively in the RI-MOM scheme (in the Landau gauge). From our preliminary analysis of the lattice data at beta=6.45, for the B-bar B mixing bag-parameter we obtain B_B^{RGI} = 1.46(7)(1).

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D. Becirevic, V. Gimenez, V. Lubicz, G. Martinelli, M. Papinutto, J. Reyes. 2002-09-17. Non-perturbative renormalisation of four fermion operators and B-bar B mixing with Wilson fermions. https://doi.org/10.1016/s0920-5632(03)01641-4

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