Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-08-19
JHEP 1108:016,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
24 pages, 9 figures, references added as in the journal version
Scientific paper
10.1007/JHEP08(2011)016
A benchmark CP-violating supersymmetric scenario (known as 'CPX-scenario' in the literature) is studied in the context of the Large Hadron Collider (LHC). It is shown that the LHC, with low to moderate accumulated luminosity, will be able to probe the existing `hole' in the $m_{h_1}$-$\tan\beta$ plane, which cannot be ruled out by the LEP data. We explore the parameter space with cascade decay of third generation squarks and gluino with CP-violating decay branching fractions. We propose a multi-channel analysis to probe this parameter space some of which are background free at an integrated luminosity of 5-10 fb$^{-1}$. Specially, multi-lepton final states ($3\l,\, 4\l$ and like sign di-lepton) are almost background free and have $5\sigma$ reach for the corresponding signals with very early data of LHC for both 14 TeV and 7 TeV center of mass energy.
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