Generalized Dispersion Sum Rules and the $A_{2}$ Trajectory in Pion Photoproduction

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19 August 1968

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 21 (8) , 577-580
https://doi.org/10.1103/physrevlett.21.577

Abstract

Generalized dispersion sum rules are used for determining the

A_{2}

trajectory and residue function in pion photoproduction. Our results favor the Gell-Mann mechanism of ghost elimination for the

A_{2}

over the Chew and no-compensation mechanisms.

Keywords

This publication has 8 references indexed in Scilit:

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Physical Review B, 1968
Ghose-Eliminating Mechanism and Trajectory Parameter of $A_{2}$ by Photoproduction Sum Rule
Physical Review Letters, 1968
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Physical Review Letters, 1967
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