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Nucleon matrix elements with $N_f=2+1+1$ maximally twisted fermions · Around

2011

Nucleon matrix elements with $N_f=2+1+1$ maximally twisted fermions

Dinter, Simon, Alexandrou, Constantia, Constantinou, Martha et al.

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We present the first lattice calculation of nucleon matrix elements using four dynamical flavors.

We use the $N_f=2+1+1$ maximally twisted mass formulation.
The renormalization is performed non-perturbatively in the RI$^\prime$-MOM scheme and results are given for the vector and axial vector operators with up to one-derivative.
Our calculation of the average momentum of the unpolarized non-singlet parton distribution is presented and compared to our previous results obtained from the $N_f=2$ case.

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C. Alexandrou, M. Constantinou, T. Korzec, H. Panagopoulos, F. Stylianou, arXiv:1006.1920
Original
1920
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R. Frezzotti and G. C. Rossi, JHEP 0408
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