The mass of the nucleon in a chiral quark-diquark model

Details The mass of the nucleon in a chiral quark-diquark model The mass of the nucleon in a chiral quark-diquark model

2004-08-27

arxiv.org/abs/hep-ph/0408312v4

Phys.Rev. C72 (2005) 035208; Erratum-ibid. C73 (2006) 049903

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 6 figures. Numerical errors are corrected. Accepted to Phys. Rev. C72 (2005) 035208

Scientific paper

10.1103/PhysRevC.72.035208

The mass of the nucleon is studied in a chiral quark-diquark model. Both scalar and axial-vector diquarks are taken into account for the construction of the nucleon state. After the hadronization procedure to obtain an effective meson-baryon Lagrangian, the quark-diquark self-energy is calculated in order to generate the baryon kinetic term as well as the mass of the nucleon. It turns out that both the scalar and axial-vector parts of the self-energy are attractive for the mass of the nucleon. We investigate the range of parameters that can reproduce the mass of the nucleon.

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