Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2004-02-17
Mod.Phys.Lett.A20:1767-1779,2005
Physics
High Energy Physics
High Energy Physics - Theory
LaTeX file, 12 pages, version appeared in MPLA, correct page numbers of the printed version are given
Scientific paper
10.1142/S0217732305017500
In the framework of the augmented superfield formalism, the local, covariant, continuous and off-shell (as well as on-shell) nilpotent (anti-)BRST symmetry transformations are derived for a $(0 + 1)$-dimensional free scalar relativistic particle that provides a prototype physical example for the more general reparametrization invariant string- and gravitational theories. The trajectory (i.e. the world-line) of the free particle, parametrized by a monotonically increasing evolution parameter $\tau$, is embedded in a $D$-dimensional flat Minkowski target manifold. This one-dimensional system is considered on a $(1 + 2)$-dimensional supermanifold parametrized by an even element $\tau$ and a couple of odd elements ($\theta$ and $\bar\theta$) of a Grassmannian algebra. The horizontality condition and the invariance of the conserved (super)charges on the (super)manifolds play very crucial roles in the above derivations of the nilpotent symmetries. The geometrical interpretations for the nilpotent (anti-)BRST charges are provided in the framework of augmented superfield approach.
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