Baryon structure from Lattice QCD

作     者：C. Alexandrou 

作者机构：Department of Physics University of Cyprus P.O. Box 20357 Nicosia CY-1678 Cyprus Computation-based Science and Technology Research Center Cyprus Institute 20 Kavafi Street Nicosia 2121 Cyprus 

出 版 物：《Chinese Physics C》 (中国物理C（英文版）)

年 卷 期：2009年第33卷第12期

页      面：1093-1101页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：Supported by Cyprus Research Promotion Foundation under contracts ΠENEK/ENIΣX/0505-39  EPYAN/0506/08 and KY-ΓA/0907/11 

主　　题：lattice QCD hadron spectrum nucleon form factors △ form factors and density distributions 

摘      要：We present recent lattice results on the baryon spectrum, nucleon electromagnetic and axial form factors, nucleon to △ transition form factors as well as the △ electromagnetic form factors. The masses of the low lying baryons and the nucleon form factors are calculated using two degenerate flavors of twisted mass fermions down to pion mass of about 270 MeV. We compare to the results of other collaborations. The nucleon to △ transition and △ form factors are calculated in a hybrid scheme, which uses staggered sea quarks and domain wall valence quarks. The dominant magnetic dipole nucleon to △ transition form factor is also evaluated using dynamical domain wall fermions. The momentum frame are extracted using the form factors transverse density distributions of the △ in the infinite determined from lattice QCD.