Export 5 results:
Sort by: Author Title Type [ Year  (Asc)]
Wanas, M. I., S. N. Osman, and R. I. El-Kholy, "Unification Principle and a Geometric Field Theory", Open Physics, vol. 13, issue 1, 2015. AbstractWebsite

In the context of the geometrization philosophy, a covariant field theory is constructed. The theory satisfies the unification principle. The field equations of the theory are constructed depending on a general differential identity in the geometry used. The Lagrangian scalar used in the formalism is neither curvature scalar nor torsion scalar, but an alloy made of both, the W-scalar. The physical contents of the theory are explored depending on different methods. The analysis shows that the theory is capable of dealing with gravity, electromagnetism and material distribution with possible mutual interactions. The theory is shown to cover the domain of general relativity under certain conditions.

Guskov, A., and R. El-Kholy, "On the Possibility to Study Antiproton Production at the SPD Detector at NICA Collider for Dark Matter Search in Astrophysical Experiments", Physics of Particles and Nuclei Letters, vol. 16, issue 3, pp. 216-223, 2019. AbstractWebsite

Dark matter is an important component of the Standard model of cosmology but its nature is still unknown. One of the most common explanations is that dark matter consists of Weakly Interacting Massive Particles (WIMPs), supposed to be cold thermal relics of the Big Bang and to build up the galactic dark halos. Indirect search of dark matter could be performed via the study of an anomalous antiproton component in cosmic rays originating from possible annihilation of dark matter pairs in the galactic halo, on top of the standard astrophysical production. The measurements performed by the AMS-02 and PAMELA spectrometers have shown that limited knowledge of antiproton-production cross sections in pp, pD,pHe and HeHe collisions is one of the main uncertainties of background subtraction. The planned SPD experiment at the NICA collider could provide a precision measurement of antiproton yield in wide kinematic range in pp and pD collisions at the energy scale from the threshold to sāˆš = 26 GeV/c.

Alexakhin, V., A. Guskov, Z. Hayman, R. El-Kholy, and A. Tkachenko, "On the Study of Antiprotons Yield in Hadronic Collisions at NICA SPD", Physics of Particles and Nuclei Letters, vol. 18, issue 2, pp. 196ā€“201, 2021.
Abramov, V. V., A. Aleshko, V. A. Baskov, E. Boos, V. Bunichev, O. D. Dalkarov, R. El-Kholy, A. Galoyan, A. V. Guskov, and et al, "Possible Studies at the First Stage of the NICA Collider Operation with Polarized and Unpolarized Proton and Deuteron Beams", Physics of Particles and Nuclei, vol. 52, issue 6, pp. 1044ā€“1119, 2021.