Authors
1
Department of physics, faculty of women for art science and education, ain shams university, cairo, egypt
2
Center for Fundamental Physics, Zewail City of Science and Technology, 6 October City, Giza 12588, Egypt. Physics Department, Faculty of Science, Helwan University, Cairo, Egypt.
3
Physics Department, Faculty of Women for Arts, Science and Education, Ain-Shams University, Cairo, 11757, Egypt.
Abstract
The calculation of chargino-nutralino pair production at the LHC with √s = 14 TeV had been studied. Different benchmark points are evaluated for the chargino-nutralino pair production using MSSM for four conditions on mass parameters. The results were compared with the latest data recorded by the LHC at √(s) = 8, 13, 14 TeV for pp collisions. In the minimal supersymmetric extension of the SM (MSSM) the mass parameters for the bino, wino, and higgsino states represented by M1, M2, and µ. Our results depend on the nature of the chargino-nutralino pair production and its masses. In case of light higgsino like sleptons the total cross section produced at small x, while for gauginos like s-quarks produced at large x due to the fact that gaugino constrained by CMS and ATLAS as heavier than 1 TeV. Assuming that the lightest supersymmetric particle (LSP) x ̃_1^0 is stable with R-parity conservation, it is a well-motivated to viable dark-matter candidate. Two scenarios of chargino-nutralino pair production are considered in this search. The first scenario Gaugino like with two conditions on the wino-bino and higgsino mass parameters [(M1 < M2 < µ) and (M1 < M2 < −µ)]. The second scenario Higgsino like with two conditions on the wino-bino and higgsino mass parameters [(M1 < −µ < M2) and (−µ < M1 < M2)]. Also, the effect of the sign and value of µ on the total cross sections for higgsinos and gauginos was represented.
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