ep - p h / 99 10 26 0 v 2 1 2 Ju l 2 00 0 Is Heavy Baryon Approach Necessary ?

ar X iv : h ep - p h / 99 10 26 0 v 1 7 O ct 1 99 9 Is Heavy Baryon Approach Necessary ?

On the simple model of interacting massless pseudoscalar and heavy fermion fields it is demonstrated that using appropriately chosen renormalization condition one can respect power counting within the relativistic theory without applying the technique of heavy baryon approach. Explicit calculations are performed for diagrams including two-loops. It is argued that the introduction of the heavy b...

ar X iv : h ep - p h / 93 12 25 0 v 1 9 D ec 1 99 3 Heavy quark supermultiplet excitations

Lorentz-covariant wave functions for meson and baryon supermultiplets are simply derived by boosting SU(2)spin representations corresponding to multiquark systems at rest. 11.30-j,11.30.Cp,11.30.Ly,12.50.Ch Typeset using REVTEX 1

ar X iv : h ep - p h / 99 07 30 0 v 1 1 2 Ju l 1 99 9 The hypothesis of a real Cabibbo

ar X iv : h ep - p h / 00 03 26 4 v 1 2 7 M ar 2 00 0 Time Dependence of Chemical Freeze - out in Relativistic Heavy Ion Collisions

ar X iv : h ep - p h / 99 08 37 7 v 2 3 S ep 1 99 9 Matching Heavy Particle Approach to Relativistic Theory

On the simple model of interacting massless and heavy scalar fields it is demonstrated that the technique of heavy baryon chiral perturbation theory reproduces the results of relativistic theory. Explicit calculations are performed for diagrams including two-loops.