New predictions for generalized spin polarizabilities from heavy baryon chiral perturbation theory

Journal Article · Wed Dec 01 04:00:00 EST 2004 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.70.114004· OSTI ID:20698115

Kao, C -W ^[1]; Pasquini, Barbara ^[2]; Vanderhaeghen, Marc ^[3]

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1. Department of Physics, North Carolina State University, Raleigh, NC27695-8202 (United States)
2. Dipartimento di Fisica Nucleare e Teorica, Universita degli Studi di Pavia, INFN, Sezione di Pavia, Pavia (Italy) and ECT, Villazzano, Trento (Italy)
3. 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, Journal Name: Physical Review. D, Particles Fields Journal Issue: 11 Vol. 70; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
C INVARIANCE
CHIRAL SYMMETRY
CHIRALITY
COMPTON EFFECT
NONLINEAR PROBLEMS
PERTURBATION THEORY
POLARIZABILITY
POLARIZATION
PROTONS
QUANTUM FIELD THEORY
SPIN
SPIN FLIP