Forward analysis of πN scattering with an expansion method

Low energy analysis of πN → πN

We derive a representation for the pion nucleon scattering amplitude that is valid to the fourth order of the chiral expansion. To obtain the correct analytic structure of the singularities in the low energy region, we have performed the calculation in a relativistic framework (infrared regularization). The result can be written in terms of functions of a single variable. We study the correspon...

REGGE DESCRIPTION OF ππ, πK, πN,KN AND NN FORWARD SCATTERING ABOVE Ekin> 1GeV

an infinite planar array of rectangular microstrip patch antenna analysis

the methods which are used to analyze microstrip antennas, are divited into three categories: empirical methods, semi-empirical methods and full-wave analysis. empirical and semi-empirical methods are generally based on some fundamental simplifying assumptions about quality of surface current distribution and substrate thickness. thses simplificatioms cause low accuracy in field evaluation. ful...

An analysis of electromagnetic scattering from finite-width strips

Isospin Violation in Threshold πN Scattering

We discuss the electromagnetic corrections to the πN scattering lengths generated by minimal e. m. coupling from a knowledge of the low energy expansion of the πN elastic scattering amplitude as well as from the nucleon and ∆ pole terms, all taken for purely strong interactions. We assume the heavy baryon limit; the e. m. and axial form factors and masses are assumed to have their empirical val...