Spinor Field with Polynomial Nonlinearity in LRS Bianchi type-I spacetime

Within the scope of LRS Bianchi type-I cosmological model the role of spinor field on the evolution of the Universe is investigated. In doing so, we have considered a polynomial type of nonlinearity. It is found that depending on the sign of self-coupling constant the model allows either accelerated mode of expansion or oscillatory mode of evolution. While the non-diagonal components of the energy-momentum tensor of the spinor field in case of a full Bianchi type-I model leading to the vanishing mass and nonlinear term in the spinor field Lagrangian, in case of an LRS Bianchi type-I model neither mass term nor the nonlinear term of spinor field vanish.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author