326 citations · 2.3k across the 93 of their papers we have counts for
11 papers · 1 filter
Effect of extrinsic curvature on quark--hadron phase transition
Malihe Heydari-Fard, Hamid Reza Sepangi
The last phase transition predicted by the standard model of particle physics took place at the QCD scale MeV when the universe was about seconds old and…
Brane gravity
A. Borzou, H. R. Sepangi, S. Shahidi +1
We consider a brane world scenario in which the bulk action is assumed to have the form of a generic function of the Ricci scalar and derive the resulting Einstein…
A cosmological viewpoint on the correspondence between deformed phase-space and canonical quantization
N. Khosravi, H. R. Sepangi, B. Vakili
We employ the familiar canonical quantization procedure in a given cosmological setting to argue that it is equivalent to and results in the same physical picture if one considers…
Generalized virial theorem in Palatini gravity
A. S. Sefiedgar, K. Atazadeh, H. R. Sepangi
We use the collision-free Boltzmann equation in Palatini gravity to derive the virial theorem within the context of the Palatini approach. It is shown that the v…
Virial mass in DGP brane cosmology
H. R. Sepangi, S. Shahidi
We study the virial mass discrepancy in the context of a DPG brane-world scenario and show that such a framework can offer viable explanations to account for the mass discrepancy p…
Classical tests in brane gravity
S. Jalalzadeh, M. Mehrnia, H. R. Sepangi
The vacuum solutions in brane gravity differ from those in 4D by a number of additional terms and reduce to the familiar Schwarzschild metric at small distances. We study the possi…
DGP brane cosmology and quark-hadron phase transition
K. Atazadeh, A. M. Ghezelbash, H. R. Sepangi
In the standard picture of cosmology it is predicted that a phase transition, associated with chiral symmetry breaking after the electroweak transition, has occurred at approximate…
Probabilistic Evolutionary Process: a possible solution to the problem of time in quantum cosmology and creation from nothing
N. Khosravi, H. R. Sepangi
We present a method, which we shall call the probabilistic evolutionary process, based on the probabilistic nature of quantum theory to offer a possible solution to the problem of…
Spherically symmetric solutions and gravitational collapse in brane-worlds
Malihe Heydari-Fard, Hamid R. Sepangi
We consider spherically symmetric solutions within the context of brane-world theory without mirror symmetry or any form of junction conditions. For a constant curvature bulk, we o…
Deformed phase space in a two dimensional minisuperspace model
H. R. Sepangi, B. Shakerin, B. Vakili
We study the effects of noncommutativity and deformed Heisenberg algebra on the evolution of a two dimensional minisuperspace cosmological model in classical and quantum regimes. T…
Bulk scalar field in brane-worlds with induced gravity inspired by the term
Malihe Heydari-Fard, Hamid R. Sepangi
We obtain the effective field equations in a brane-world scenario within the framework of a DGP model where the action on the brane is an arbitrary function of the Ricci scalar, ${…