Gravity from Poincare Gauge Theory of the Fundamental Particles. VI: -- Scattering Amplitudes --

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Abstract
Poincaré gauge theory has, besides graviton, the particle spectrum of six massive particles with spinparity = 2±, 1± and 0±, obtained from the linear field approximation of the torsion field. In addition to the normality condition that any of these particles should have positive mass and positive energy, we now require the asymptotic condition that Born amplitudes in scattering problems should be of the same order of magnitude, i.e., 1/k2, as in General Relativity when virtual momentum k of annihilation processes tends to infinity. The result is as follows: The above six massive particles are then reduced to the four classes, (1+, 1−), (1−,0−), (2−,0−) and (0−).

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