MG15 - Talk detail

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We consider a model based on $p-$form kinetic Lagrangians in the context of dark energy. The Lagrangian of the model is built with kinetic terms of the field strength for each $p$-form (generalizing the usual Maxwell term $F_{\mu\nu}F^{\mu\nu}$), and coupling with a scalar field $\phi$, which can drive the actual expansion of the Universe as a Quintessence field. Since we are interested in cosmological applications, we specialize the analysis to a 4-dimensional case, including as well contractions with dual contributions as $F_{\mu\nu}\tilde{F}^{\mu\nu}$ being $\tilde{F}^{\mu\nu}$ the Hodge dual of $F$. Through the analysis of the effective energy-momentum tensor, conditions for cosmological viability (at background level) are considered via the effective equation of state. This approach allows us to give also general expressions of the energy conditions in the context of $p$-forms. Finally, we discuss possible directions to cosmological observations in this scenario.

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