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标题：Structure of the pion from full lattice QCD
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作者：D. Broemmel ; M. DIEHL ; M. Gockeler 等
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2005
卷号：2005
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：Moments of generalised parton distributions can be related to off-forward matrix elements of local operators. We calculate a few of the leading twist matrix elements for the pion on the lattice. The simulations are performed using two avours of dynamical fermions and a range of pion masses from 550 to 1090 MeV. Our lattice spacings and spatial volumes lie in the range 0.07.0.12 fm and (1.6.2.2 fm)3, respectively. Key features of our investigation are the use of O(a) improved Wilson fermions and non-perturbative renormalisation. We present rst results for the two lowest moments of the generalised parton distributions of the pion and compare the pion electromagnetic form factor Fp to experimental data. Good agreement is found between lattice data and experiment.