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Crossing-Symmetric Amplitudes with Arbitrary Regge Behavior Based on Elementary Symmetric Functions

M. L. Thiebaux
Published: 25 December 1969

Abstract: A sequence of amplitudes for ππ→πω is constructed exhibiting exact crossing symmetry, Regge asymptotic behavior, direct-channel poles, and arbitrary nonlinear trajectories. The sequence, constructed out of the elementary symmetric functions of s, t, and u, possesses some of the desired features in a limiting sense only. In the complex angular momentum plane, any member of the sequence contains a leading finite array of simple poles spaced by two units, and additional nonleading arrays of higher-order singularities. A similar amplitude for the elastic scattering of neutral scalar bosons is proposed to test the unitarizability of the representation by finding a suitable nonlinear trajectory.
Keywords: Crossing Symmetric / Symmetric Amplitudes / Arbitrary Regge / Elementary Symmetric / symmetric functions / Regge Behavior / Behavior Based

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