22-30 July 2021
North-West University
Africa/Johannesburg timezone
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Cosmological Models in Gravitational Scalar-Tensor Theories

27 Jul 2021, 11:30
Potchefstroom Campus (North-West University)

Potchefstroom Campus

North-West University

Oral Presentation Track G - Theoretical and Computational Physics Theoretical and Computational Physics


Heba Abdulrahman (North West University, South Africa)


In this work, a brief review of a new form of scalar-tensor theories of gravity, known as gravitational scalar-tensor theories (GST) in which the action is composed of the Ricci scalar and its first and second derivatives is made. Some of the cosmological applications that have been investigated in these new theories are discussed considering different models corresponding to the first non-trivial extensions of general relativity possessing 2 + 2 degrees of freedom. We show that the resulting cosmological behavior is in agreement with observations.

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Primary author

Heba Abdulrahman (North West University, South Africa)


Prof. Amare Abebe (North-West University)

Presentation Materials

Peer reviewing