Baryons and Chiral Symmetry

Understand

The relevance of chiral symmetry in baryons is highlighted in three examples in the nucleon spectroscopy and structure.

• The first one is the importance of chiral dynamics in understanding the Roper resonance.
• The second one is the role of chiral symmetry in the lattice calculation of $\pi N \sigma$ term and strangeness.
• The third one is the role of chiral $U(1)$ anomaly in the anomalous Ward identity in evaluating the quark spin and the quark orbital angular momentum.