New predictions for generalized spin polarizabilities from heavy baryon chiral perturbation theory
- Department of Physics, North Carolina State University, Raleigh, NC27695-8202 (United States)
- Dipartimento di Fisica Nucleare e Teorica, Universita degli Studi di Pavia, INFN, Sezione di Pavia, Pavia (Italy) and ECT, Villazzano, Trento (Italy)
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606 (United States) and Department of Physics, College of William and Mary, Williamsburg, Virginia 23187 (United States)
We extract the next-to-next-to-leading order results for spin-flip generalized polarizabilities (GPs) of the nucleon from the spin-dependent amplitudes for virtual Compton scattering at O(p{sup 4}) in heavy baryon chiral perturbation theory. At this order, no unknown low-energy constants enter the theory, allowing us to make absolute predictions for all spin-flip GPs. Furthermore, by using constraint equations between the GPs due to nucleon crossing combined with charge conjugation symmetry of the virtual Compton scattering amplitudes, we get a next-to-next-to-next-to-leading order prediction for one of the GPs. We provide estimates for forthcoming double-polarization experiments which allow one to access these spin-flip GPs of the nucleon.
- OSTI ID:
- 20698115
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 70, Issue 11; Other Information: DOI: 10.1103/PhysRevD.70.114004; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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