The Lagrangian Description of Representations of the Poincare Groupč

It is well known that the particles with the value of spin more than two arise naturally when quantizing such classical objects as the relativistic oscillator [1], string [2] or discrete string [3,4]. The challenging problem for these kinds of theories is to construct the lagrangian description both for free and for interacting particles with the higher spins. In order to kill ghosts and all other superfluous representations the field theoretical lagrangians, describing irreducible Poincare representations must possess some gauge invariance. Along with the basic fields such lagrangians in general include additional ones. The role of these fields is to single out the irreducible representation of the Poincare group. Some of them are auxiliary, others can be gauged away. After a gauge fixing and solving the equations of motion for auxiliary fields one is left with the only es-