General angular conditions in light-front dynamics for few-body systems

Journal Article · Fri May 06 04:00:00 EDT 2005 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.1932966· OSTI ID:20722298

Ji, C -R ^[1]

---

1. Department of Physics, North Carolina State University, Raleigh, NC 27695-8202 (United States)

The light-front dynamics(LFD) plays an important role in the analyses of few-body systems as evidenced from the recent phenomenology covering both inclusive and exclusive processes. We thus discuss a few fundamental issues of LFD that should be taken into account for the phenomenological applications. In particular, we derive general angular conditions which should be satisfied by the light-front helicity amplitudes for any spin system and obtain the light-front parity and time-reversal relations for the light-front helicity amplitudes. As an application of these relations, we make some comments on the consequences of the general angular condition for the transition between spin-1/2 and spin-3/2 systems and find a relation useful for the analysis of the N-{delta} transition form factors. Also, for the analysis of the deuteron and {rho} meson form factors, we note that the general angular condition for the spin-1 systems is satisfied only if the zero-mode contribution in the helicity zero-to-zero amplitude is properly taken into account. Discussions follow on the scaling law and the subleading power corrections for these form factor analyses.

• OSTI ID: 20722298
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 768; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
AMPLITUDES
CORRECTIONS
DEUTERONS
FORM FACTORS
HELICITY
LAMBDA BARYONS
NUCLEONS
PARITY
RHO-770 MESONS
SCALING LAWS
SPIN