Nilpotent and absolutely anticommuting symmetries in the Freedman-Townsend model: Augmented superfield formalism

作者：Shukla A^*; Krishna S; Malik R P

来源：International Journal of Modern Physics A, 2014, 29(31): 1450183.

DOI：10.1142/S0217751X14501838

• Freedman-Townsend model
• augmented superfield formalism
• Yang-Mills and tensorial gauge symmetries
• (anti-) BRST symmetries
• nilpotency and absolute anticommutativity

We derive the off-shell nilpotent and absolutely anticommuting Becchi-Rouet-Stora-Tyutin (BRST) and anti-BRST symmetry transformations, corresponding to the (1-form) Yang-Mills (YM) and (2-form) tensorial gauge symmetries of the four (3 + 1)dimensional (4D) Freedman-Townsend (FT) model, by exploiting the augmented version of Bonora-Tonin%26apos;s (BT) superfield approach to BRST formalism where the 4D flat Minkowskian theory is generalized onto the (4, 2)-dimensional supermanifold. One of the novel observations is the fact that we are theoretically compelled to go beyond the horizontality condition (HC) to invoke an additional set of gauge-invariant restrictions (GIRs) for the derivation of the full set of proper (anti-) BRST symmetries. To obtain the (anti-) BRST symmetry transformations, corresponding to the tensorial (2-form) gauge symmetries within the framework of augmented version of BT-superfield approach, we are logically forced to modify the FT-model to incorporate an auxiliary 1-form field and the kinetic term for the antisymmetric (2-form) gauge field. This is also a new observation in our present investigation. We point out some of the key differences between the modified FT-model and Lahiri-model (LM) of the dynamical non-Abelian 2-form gauge theories. We also briefly mention a few similarities.

• 出版日期2014-12-20