**Constraining f (T ,T ) gravity models using type Ia supernovae**

__D. Sáez Gómez__, __C. S. Carvalho__, __F. S. N. Lobo__, __I. Tereno__

**Abstract**

We present an analysis of an f (T ,T ) extension of the Teleparallel Equivalent of General Relativity, where T denotes the torsion and T denotes the trace of the energy-momentum tensor. This extension includes nonminimal couplings between torsion and matter. In particular, we construct two specific models that recover the usual continuity equation, namely, f (T ,T )=T +g (T ) and f (T ,T )=T ×g (T ). We then constrain the parameters of each model by fitting the predicted distance modulus to that measured from type Ia supernovae and find that both models can reproduce the late-time cosmic acceleration. We also observe that one of the models satisfies well the observational constraints and yields a goodness-of-fit similar to the Λ CDM model, thus demonstrating that f (T ,T ) gravity theory encompasses viable models that can be an alternative to Λ CDM.

**Physical Review D**

Volume 94

July 2016

**DOI:** 10.1103/PhysRevD.94.024034**ADS Bibliographic code:** 2016PhRvD..94b4034S