文章基本信息

标题：Parton Distribution Amplitudes
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作者：T. Rae ; R. Arthur ; P.A. Boyle 等
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2010
卷号：2010
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We calculated the first two moments of the light-cone distribution amplitudes for the pseudoscalar mesons (p and K) and the longitudinally polarised vector mesons (r, K∗ and f ) as part of the UKQCD and RBC collaborations’ Nf = 2+1 domain-wall fermion phenomenology programme. These quantities were obtained with a good precision and, in particular, the expected effects of SU(3)-flavour symmetry breaking were observed. Operators were renormalised nonperturbatively and extrapolations to the physical point were made, guided by leading order chiral perturbation theory. The main results presented are for two volumes, 163×32 and 243×64, with a common lattice spacing. Preliminary results for a lattice with a finer lattice spacing, 323×64, are discussed and a first look is taken at the use of twisted boundary conditions to extract distribution amplitudes.