name

Meinulf Goeckeler

refid

13889

email

meinulf.goeckeler@physik.uni-regensburg.de

title

Four-quark operators in hadrons

collaboration

S. Capitani, R. Horsley, B. Klaus, W. Kuerzinger,
D. Petters, D. Pleiter, P.E.L. Rakow, G. Schierholz,
S. Schaefer, A. Schaefer

abstract

We present calculations of matrix elements of four-quark operators in
the pion and in the nucleon extracted from quenched Monte Carlo
simulations at beta=6.0 using Wilson fermions. These operators are
relevant for higher-twist effects. In the case of the nucleon, they
give also some hints on possible diquark structures. We are particularly
careful to avoid mixing with lower-dimensional operators by choosing
appropriate flavour structures.

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