Delta Properties in the Rainbow-Ladder Truncation of Dyson鈥揝chwinger Equations

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• 作者：D. Nicmorus (12) nicmorus@th.physik.uni-frankfurt.de
  G. Eichmann (3)
  A. Krassnigg (4)
  R. Alkofer (4)
• 刊名：Few-Body Systems
• 出版时间：March 2011
• 出版年：2011
• 期刊代码：42_0177-7963
• 类别：ph
• 卷：49
• 期：1-4
• 页码：255-261
• 数据来源：sp

摘要

We present a calculation of the three-quark core contribution to nucleon and Δ-baryon masses and Δ electromagnetic form factors in a Poincar茅-covariant Faddeev approach. A consistent setup for the dressed-quark propagator, the quark–quark, quark–’diquark’ and quark–photon interactions is employed, where all ingredients are solutions of their respective Dyson–Schwinger or Bethe–Salpeter equations in a rainbow-ladder truncation. The resulting Δ electromagnetic form factors concur with present experimental and lattice data.