Accelerating universe in modified teleparallel gravity theory

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This paper studies the cosmology of accelerating expansion of the universe in modified teleparallel gravity theory.

• We discuss the cosmology of $f(T,B)$ gravity theory and its implication to the new general form of the equation of state parameter $w_{TB}$ for explaining the late-time accelerating expansion of the universe without the need for the cosmological constant scenario.
• We examine the numerical value of $w_{TB}$ in different paradigmatic $f(T,B)$ gravity models.
• In those models, the numerical result of $w_{TB}$ is favored with observations in the presence of the torsion scalar T associated with a boundary term B and shows the accelerating expansion of the universe.