### Abstract

We developed a manifestly Lorentz covariant chiral quark model for the study of baryons as bound states of constituent quarks in an extension of our previous approach. The investigations are related to the ongoing and planned experiments on improved measurements of the elastic baryon form factors and their decay characteristics. The approach is based on a non-linear chirally symmetric Lagrangian, which involves effective degrees of freedom-constituent quarks and the chiral (meson) fields. In a first step, this Lagrangian can be used to perform a dressing of the constituent quarks by a cloud of light pseudoscalar mesons and other heavy states using the calculational technique developed by Becher and Leutwyler. We calculate the dressed transition operators with a proper chiral expansion which are relevant for the interaction of quarks with external fields in the presence of a virtual meson cloud. These operators are used in the calculation of baryon matrix elements.

Original language | English |
---|---|

Pages (from-to) | 12-22 |

Number of pages | 11 |

Journal | Progress in Particle and Nuclear Physics |

Volume | 55 |

Issue number | 1 |

DOIs | |

Publication status | Published - Jul 2005 |

Externally published | Yes |

Event | International School of Nuclear Physics 26th Course Lepton Scattering and the Structure of Hadrons and Nuclei - Duration: 16 Sep 2004 → 24 Sep 2004 |

### Fingerprint

### Keywords

- Baryons
- Chiral symmetry
- Nucleon form factors
- Relativistic quark model

### ASJC Scopus subject areas

- Nuclear and High Energy Physics

### Cite this

*Progress in Particle and Nuclear Physics*,

*55*(1), 12-22. https://doi.org/10.1016/j.ppnp.2005.01.026

**Chiral dynamics of baryons in a covariant quark model.** / Faessler, Amand; Gutsche, Th; Lyubovitskij, V. E.; Pumsa-Ard, K.

Research output: Contribution to journal › Review article

*Progress in Particle and Nuclear Physics*, vol. 55, no. 1, pp. 12-22. https://doi.org/10.1016/j.ppnp.2005.01.026

}

TY - JOUR

T1 - Chiral dynamics of baryons in a covariant quark model

AU - Faessler, Amand

AU - Gutsche, Th

AU - Lyubovitskij, V. E.

AU - Pumsa-Ard, K.

PY - 2005/7

Y1 - 2005/7

N2 - We developed a manifestly Lorentz covariant chiral quark model for the study of baryons as bound states of constituent quarks in an extension of our previous approach. The investigations are related to the ongoing and planned experiments on improved measurements of the elastic baryon form factors and their decay characteristics. The approach is based on a non-linear chirally symmetric Lagrangian, which involves effective degrees of freedom-constituent quarks and the chiral (meson) fields. In a first step, this Lagrangian can be used to perform a dressing of the constituent quarks by a cloud of light pseudoscalar mesons and other heavy states using the calculational technique developed by Becher and Leutwyler. We calculate the dressed transition operators with a proper chiral expansion which are relevant for the interaction of quarks with external fields in the presence of a virtual meson cloud. These operators are used in the calculation of baryon matrix elements.

AB - We developed a manifestly Lorentz covariant chiral quark model for the study of baryons as bound states of constituent quarks in an extension of our previous approach. The investigations are related to the ongoing and planned experiments on improved measurements of the elastic baryon form factors and their decay characteristics. The approach is based on a non-linear chirally symmetric Lagrangian, which involves effective degrees of freedom-constituent quarks and the chiral (meson) fields. In a first step, this Lagrangian can be used to perform a dressing of the constituent quarks by a cloud of light pseudoscalar mesons and other heavy states using the calculational technique developed by Becher and Leutwyler. We calculate the dressed transition operators with a proper chiral expansion which are relevant for the interaction of quarks with external fields in the presence of a virtual meson cloud. These operators are used in the calculation of baryon matrix elements.

KW - Baryons

KW - Chiral symmetry

KW - Nucleon form factors

KW - Relativistic quark model

UR - http://www.scopus.com/inward/record.url?scp=19344377682&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=19344377682&partnerID=8YFLogxK

U2 - 10.1016/j.ppnp.2005.01.026

DO - 10.1016/j.ppnp.2005.01.026

M3 - Review article

AN - SCOPUS:19344377682

VL - 55

SP - 12

EP - 22

JO - Progress in Particle and Nuclear Physics

JF - Progress in Particle and Nuclear Physics

SN - 0146-6410

IS - 1

ER -