Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-11-29
Phys.Rev. D71 (2005) 075012
Physics
High Energy Physics
High Energy Physics - Phenomenology
22 pages and 12 figures; version to appear in Phys.Rev.D
Scientific paper
10.1103/PhysRevD.71.075012
The common belief that the lightest supersymmetric particle (LSP) might be a neutralino, providing also the main Dark Matter (DM) component, calls for maximal detail in the study of the neutralino properties. Motivated by this, we consider the direct production of a single neutralino $\tchi^0_i$ at a high/energy hadron collider, focusing on the $\tchi^0_1$ and $\tchi^0_2$ cases. At Born level, the relevant subprocesses are $q\bar q\to \tchi^0_i \tilde g$, $g q\to \tchi^0_i \tilde q_{L,R}$ and $q\bar q'\to \tchi^0_i\tchi^\pm_j$; while at 1-loop, apart from radiative corrections to these processes, we consider also $gg\to \tchi^0_i\tilde{g}$, for which a numerical code named PLATONgluino is released. The relative importance of these channels turns out to be extremely model dependent. Combining these results with an analogous study of the direct $\tchi^0_i\tchi^0_j$ pair production, should help in testing the SUSY models and the Dark Matter assignment.
Gounaris G. J.
Layssac J.
Porfyriadis P. I.
Renard Fernand M.
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