Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-04-20
Phys.Rev.D70:033011,2004
Physics
High Energy Physics
High Energy Physics - Phenomenology
30 pages and 12 figures, version to appear in Phys.Rev.D
Scientific paper
10.1103/PhysRevD.70.033011
We consider the production of neutralino pairs $\tchi^0_i\tchi^0_j$ at a high energy hadron collider, putting a special emphasis on the case where one of them is the lightest neutralino $\tchi^0_1$, possibly constituting the main Dark Matter component. At tree level, the only relevant subprocess is $q\bar q\to \tchi^0_i\tchi^0_j$, while the subprocess $gg\to \tchi^0_i\tchi^0_j$ first appears at the one loop level. Explicit expressions for the $q\bar q$-helicity amplitudes are presented, including the tree level contributions and the leading-log one loop radiative corrections. For the one-loop $ gg\to \tchi^0_i\tchi^0_j$ process, a numerical code named PLATONggnn is released, allowing the computation of $d\sigma /d \that$ in any MSSM model with real soft breaking parameters. It turns out that acceptable MSSM benchmark models exist for which the $q\bar q $ and the gluonic contributions may give comparable effects at LHC, due to the enhanced gluonic structure functions at low fractional momenta. Depending on the values of the MSSM parameters, we find that the LHC neutralino pair production may provide sensitive tests of SUSY models generating neutralino Dark Matter.
Gounaris G. J.
Layssac J.
Porfyriadis P. I.
Renard Fernand M.
No associations
LandOfFree
Neutralino pair production at CERN LHC does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Neutralino pair production at CERN LHC, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Neutralino pair production at CERN LHC will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-55591