文章基本信息

标题：Pion structure from twisted mass lattice QCD down to the physical pion mass
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作者：B.Kostrzewa ; M.Oehm ; F.Sanfilippo 等
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2016
卷号：256
DOI：10.22323/1.256.0166
语种：English
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We present an investigation of pion structure based on ETMC Nf = 2 and Nf = 2 + 1 + 1 twisted mass configurations at maximal twist. We compute the first moment of the quark momentum fraction of the pion, hxi and the electromagnetic form factor, F $\pi$ (Q 2). For the latter, momentum is injected using twisted boundary conditions and the calculation is carried out directly at the physical pion mass. We find that our data are consistent with vector meson dominance and experimental data in the region of small momentum transfer. For hxi, we find that our chirally and continuum extrapolated result is compatible with its phenomenological value.