Spin Sum Rules at Low $Q^2$

Details Spin Sum Rules at Low $Q^2$ Spin Sum Rules at Low $Q^2$

2009-07-09

arxiv.org/abs/0907.1475v1

AIP Conf.Proc.1182:610-613,2009

Physics

Nuclear Physics

Nuclear Experiment

4 pages, to be published in the Proceedings of the 10th Conference on Intersections of Nuclear and Particle Physics (CIPANP)

Scientific paper

10.1063/1.3293883

Recent precision spin-structure data from Jefferson Lab have significantly advanced our knowledge of nucleon structure at low $Q^2$. Results on the neutron spin sum rules and polarizabilities in the low to intermediate $Q^2$ region are presented. The Burkhardt-Cuttingham Sum Rule was verified within experimental uncertainties. When comparing with theoretical calculations, results on spin polarizability show surprising disagreements with Chiral Perturbation Theory predictions. Preliminary results on first moments at very low $Q^2$ are also presented.

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