We investigate finite size effects of the pion matrix element of the nonsinglet, twist-2 operator corresponding to the average momentum of nonsinglet quark densities. Using the quenched approximation, they come out to be surprisingly large when compared to the finite size effects of the pion mass. As a consequence, simulations of corresponding nucleon matrix elements could be affected by finite size effects even stronger which could lead to serious systematic uncertainties in their evaluation.

Guagnelli, M., Jansen, K., Palombi, F., Petronzio, R., Shindler, A., Wetzorke, I. (2004). Finite size effects of a pion matrix element. PHYSICS LETTERS, B597, 216-221 [10.1016/j.physletb.2004.07.020].

Finite size effects of a pion matrix element

PETRONZIO, ROBERTO;
2004-01-01

Abstract

We investigate finite size effects of the pion matrix element of the nonsinglet, twist-2 operator corresponding to the average momentum of nonsinglet quark densities. Using the quenched approximation, they come out to be surprisingly large when compared to the finite size effects of the pion mass. As a consequence, simulations of corresponding nucleon matrix elements could be affected by finite size effects even stronger which could lead to serious systematic uncertainties in their evaluation.
2004
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore FIS/02 - FISICA TEORICA, MODELLI E METODI MATEMATICI
English
Con Impact Factor ISI
Guagnelli, M., Jansen, K., Palombi, F., Petronzio, R., Shindler, A., Wetzorke, I. (2004). Finite size effects of a pion matrix element. PHYSICS LETTERS, B597, 216-221 [10.1016/j.physletb.2004.07.020].
Guagnelli, M; Jansen, K; Palombi, F; Petronzio, R; Shindler, A; Wetzorke, I
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/33976
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