Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 5 of 5
Full-Text Articles in Physics
Topical Review: Greybody Factors And Quasinormal Modes For Black Holes Invarious Theories - Fingerprints Of Invisibles, İzzet Sakalli, Sara Kanzi
Topical Review: Greybody Factors And Quasinormal Modes For Black Holes Invarious Theories - Fingerprints Of Invisibles, İzzet Sakalli, Sara Kanzi
Turkish Journal of Physics
We give a pedagogical introduction to black holes (BHs) greybody factors (GFs) and quasinormal modes (QNMs) and share the recent developments on those subjects. To this end, we present some particular analytical and approximation techniques for the computations of the GFs and QNMs. We first review the gravitational GFs and show how they are analytically calculated for static and spherically symmetric higher dimensional BHs, consisting the charged BHs and existence of cosmological constant (i.e. de Sitter (dS)/anti-de Sitter (AdS)AdS BHs). The computations performed involve both the low-energy (having real and small frequencies) and the asymptotic (having extremely high frequency of …
Quasinormal Modes Of Charged Fermions In Linear Dilaton Black Hole Spacetime:Exact Frequencies, İzzet Sakalli, Gülni̇hal Tokgöz Hyusein
Quasinormal Modes Of Charged Fermions In Linear Dilaton Black Hole Spacetime:Exact Frequencies, İzzet Sakalli, Gülni̇hal Tokgöz Hyusein
Turkish Journal of Physics
: We study charged massless fermionic perturbations in the background of 4-dimensional linear dilaton black holes in Einstein-Maxwell-dilaton theory with double Liouville-type potentials. We present the analytical fermionic quasinormal modes, whose Dirac equations are solved in terms of hypergeometric functions. We also discuss the stability of these black holes under the charged fermionic perturbations.
Spin (Pseudospin) Doublet In View Of Energy-Dependent Potential, Mustafa Salti, Oktay Aydoğdu
Spin (Pseudospin) Doublet In View Of Energy-Dependent Potential, Mustafa Salti, Oktay Aydoğdu
Turkish Journal of Physics
Behavior of Dirac particles in the presence of scalar, vector, and tensor potentials respectively represented by energy-dependent Morse and Coulomb-like potentials is examined by working out the Dirac equation under the condition of spin (pseudospin) symmetry. The closed form of the energy eigenvalue equation and corresponding wave functions in terms of hypergeometric functions are acquired by making use of the asymptotic iteration method. We investigate the effect of energy-dependent potential on both bound states and energy splitting between members of spin (pseudospin) doublets.
The Impact Of Hyperfine Interaction On The Charge Radius Of Protons, Majid Amirfakhrian
The Impact Of Hyperfine Interaction On The Charge Radius Of Protons, Majid Amirfakhrian
Turkish Journal of Physics
In this paper, the wave function of a Proton has been calculated via solving the Dirac equation for a three-particle system. Then, the charge radius of the proton was measured. Isospin-Isospin interaction was added to the system as a perturbation factor, and the variation of the charge radius of Proton was considered. Finally, the spin-spin and spin-isospin interactions on the charge radius of the Proton were calculated based on this method.
On The Eigensolutions Of The One-Dimensional Kemmer Oscillator, A. Boumali
On The Eigensolutions Of The One-Dimensional Kemmer Oscillator, A. Boumali
Turkish Journal of Physics
In the present paper, we solve the one-dimensional Kemmer equation in the presence of the Dirac oscillator potential. Following Greiner in [23], we have shown that the eigensolutions are decoupled in two sets.