Trilepton production at the CERN LHC: Standard model sources and beyond

Details Trilepton production at the CERN LHC: Standard model sources and beyond Trilepton production at the CERN LHC: Standard model sources and beyond

2008-05-23

arxiv.org/abs/0805.3720v3

Phys.Rev.D78:034030,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

33 pgs, 17 figs, revtex; repaired damaged latex source

Scientific paper

10.1103/PhysRevD.78.034030

Events with three or more isolated leptons in the final state are known to be signatures of new physics phenomena at high energy collider physics facilities. Standard model sources of isolated trilepton final states include gauge boson pair production such as $WZ$ and $W\gamma^*$, and $t\bar{t}$ production. We demonstrate that leptons from heavy flavor decays, such as $b \to lX$ and $c \to lX$, provide sources of trileptons that can be orders-of-magnitude larger after cuts than other standard model backgrounds to new physics processes. We explain the physical reason heavy flavor backgrounds survive isolation cuts. We propose new cuts to control the backgrounds in the specific case of chargino plus neutralino pair production in supersymmetric models. After these cuts are imposed, we show that it should be possible to find at least a 4 sigma excess for supersymmetry parameter space point LM9 with 30 fb$^{-1}$ of integrated luminosity.

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