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Four-quark operators in hadrons

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arxiv hep-lat/0010043 v1 pith:FKAX7LN7 submitted 2000-10-26 hep-lat

S. Capitani , M. Gockeler , R. Horsley , B. Klaus , W. Kurzinger , D. Petters , D. Pleiter , P.E.L. Rakow
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S. Schaefer A. Schafer G. Schierholz
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classification hep-lat
keywords operatorsappropriateavoidbetacalculationscarefulcarlochoosing
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We present calculations of matrix elements of 4-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. We are particularly careful to avoid mixing with lower-dimensional operators by choosing appropriate flavour structures.

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