3 papers
physics.gen-ph2026
A Six-Parameter Teleparallel Cosmology Beyond CDM: Sign-Changing Torsional Dark Energy and Implications for
Mohamed Bedair, Mahmoud Hashim, Jackson Levi Said +1
We investigate a particular case of the extended exponential infrared f(T) teleparallel gravity, in which the geometric sector naturally produces an effective dark-energy density t…
astro-ph.CO2026
Cosmological Viability of Exponential Infrared Gravity
Mahmoud Hashim, Eleonora Di Valentino, Jackson Levi Said +1
We investigate the cosmological viability of exponential infrared teleparallel gravity using current cosmological observations. This framework realizes late-time cosmic acce…
gr-qc2024★ 2 cited
Revisiting Flat Rotation Curves in Chern-Simons Modified Gravity
Waleed El Hanafy, Mahmoud Hashim, G. G. L. Nashed
We revisit slow rotating black hole (BH) solutions in Chern-Simons modified gravity (CSMG) by considering perturbative solution about Schwarzschild BH. In particular, the case when…