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Role of collisional matter in the framework of extended teleparallel theory
By Muhammad Zeeshan, M. Zubair and Rabia Saleem
Published in International Journal of Modern Physics D 29, 2050099 (Thursday, November 26, 2020)

Abstract

The purpose of this work is to examine the cosmic evolution in the presence of collisional matter (CM) with and without radiations in a modified Teleparallel theory involving a generic function f(T,B)f(T,B) which depends on the scalar torsion TT and the boundary term associated to the divergence of torsion 2∇μTμ=B2∇μTμ=B. We select seven novel f(T,B)f(T,B) models including power law, logarithmic models and exponential models, some of these reported in [S. Bahamonde, M. Zubair and G. Abbas, Phys. Dark Univ.19 (2018) 78; S. Bahamonde and S. Capozziello, The Eur. Phys. J. C.77 (2017) 107; C. Escamilla-Rivera and J. L. Said, Class. Quantum Grav.37 (2020) 165002] and discuss the evolutionary scenario. The behavior of deceleration parameter q(z)q(z), Hubble parameter H(z)H(z), Equation-of-state (EoS) for dark energy (DE) and effective EoS is presented. ΛΛCDM epoch and crossing of phantom divide line (approaching to phantom era) is observed in scenarios like noncollisional matter (NCM) with radiation, CM with and without radiation. Results are found to be adequate with recent cosmic observations.

CCRG Authors

Zeeshan, Muhammad