Baryon structure from Lattice QCD

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 transverse density distributions of the △ in the infinite momentum frame are extracted using the form factors determined from lattice QCD.

关键词： lattice QCD hadron spectrum nucleon form factors △ form factors and density distributions

作者: C.Alexandrou

作者单位: 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

会议类型: 国际会议

会议名称: The 12th International Workshop on the Physics Ezcited Nucleon(2009核子共振态物理国际研讨会)

会议地点: 北京

会议语种:英文

页码: 1093-1101

在线出版日期: 2009-04-19（万方平台首次上网日期，不代表论文的发表时间）