%0 Journal Article
%T Single Neutralino production at CERN LHC
%+ Laboratoire de Physique Mathématique et Théorique (PMT)
%A Gounaris, G. J.
%A Layssac, J.
%A Porfyriadis, P. I.
%A Renard, F. M.
%Z 20 pages
%< avec comité de lecture
%Z PM/04-38
%@ 1550-7998
%J Physical Review D
%I American Physical Society
%V 71
%P 075012.1
%8 2005
%D 2005
%Z hep-ph/0411366
%R 10.1103/PhysRevD.71.075012
%Z PACS: 14.80.Ly, 12.15.Lk, 13.75.Cs
%Z Physics [physics]/High Energy Physics - Phenomenology [hep-ph]Journal articles
%X 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.
%G English
%L hal-00259264
%U https://hal.science/hal-00259264
%~ CNRS
%~ UNIV-MONTP2
%~ UNIV-MONTPELLIER
%~ UM1-UM2