Gamma N Delta Form Factors and Wigner Rotations

Details Gamma N Delta Form Factors and Wigner Rotations Gamma N Delta Form Factors and Wigner Rotations

2008-10-28

arxiv.org/abs/0810.4958v1

Phys.Rev.C80:038201,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages

Scientific paper

10.1103/PhysRevC.80.038201

For more than 50 years the Delta N gamma form factors have been studied experimentally, theoretically, and phenomenologically. Although there has been substantial progress in understanding their behavior, there remains much work to be done. A major tool used in many investigations is the Jones-Scadron Delta rest frame parametrization of the three Delta N gamma form factors. We point out that many studies utilizing this parametrization may not account for Wigner rotations and the consequent helicity mixing that ensues when the Delta is not at rest.

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