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6 papers · 1 filter
Photon Damping in One-Loop HTL Perturbation Theory
Abdessamad Abada, Nacera Daira-Aifa
We determine the damping rates of slow-moving photons in next-to-leading order hard-thermal-loop perturbation of massless QED. We find both longitudinal and transverse rates finite…
Inconsistency in Fermi's probability of the quantum states
Mofreh R. Zaghloul
We point out an important hidden inconsistency in Fermi's probability of the quantum states that engendered inconsistent/inaccurate equations-of-state extensively used in the liter…
A Novel Image Segmentation Enhancement Technique based on Active Contour and Topological Alignments
Ashraf A. Aly, Safaai Bin Deris, Nazar Zaki
Topological alignments and snakes are used in image processing, particularly in locating object boundaries. Both of them have their own advantages and limitations. To improve the o…
Algorithm 916: computing the Faddeyeva and Voigt functions
Mofreh R. Zaghloul, Ahmed N. Ali
We present a MATLAB function for the numerical evaluation of the Faddeyeva function w(z). The function is based on a newly developed accurate algorithm. In addition to its higher a…
Inductive Formulas for some Arithmetic Functions
Mohamed El Bachraoui
We prove recursive formulas involving sums of divisors and sums of triangular numbers and give a variety of identities relating arithmetic functions to divisor functions providing…
A Two-Singlet Model for Light Cold Dark Matter
Abdessamad Abada, Salah Nasri, Djamal Ghaffor
We extend the Standard Model by adding two gauge-singlet % -symmetric scalar fields that interact with visible matter only through the Higgs particle. One is a stab…