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Phys. Rev. D 77, 025028 (2008) [20 pages]Bootstrap and the physical values of piN resonance parameters
Received 23 June 2007; published 28 January 2008
This is the sixth paper in the series developing the formalism to manage the effective scattering theory of strong interactions. Relying on the theoretical scheme suggested in our previous publications we concentrate here on the practical aspect and apply our technique to the elastic pion-nucleon scattering amplitude. We test numerically the piN spectrum sum rules that follow from the tree-level bootstrap constraints. We show how these constraints can be used to estimate the tensor and vector NNrho coupling constants. Last, we demonstrate that the tree-level low-energy expansion coefficients computed in the framework of our approach show a nice agreement with known experimental data. These results allow us to claim that the extended perturbation scheme is quite reasonable from the computational point of view. ©2008 The American Physical Society REFERENCES (20)
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