CERN Summer Student Report

One of the features of the SUSY is the R-parity, a multiplicative quantum number which has the value +1 for SM and -1 for SUSY particles. Here is considered the R-parity conserved production of gluino pair at the LHC, with each of them decaying to two quarks and one neutralino. As the end result, after the neutralino decay, we get 10 quarks, the so-called 2x5 model. For the decay of neutralinos the R-parity violation was assumed. Masses of neutralino and gluino are set to 50 GeV and 1000 GeV respectively. Using simulated data of 20 000 events, for the first time both small-R and large-R jets are used to target signals where some of the decay products are well separated, but some are close together. It was found that quarks originating from direct gluino decay can be reconstructed using small-R jets, while those originating from neutralino decay can be reconstructed using large-R jets. Further, some variables were tested to see how often in reconstruction do we pick jets with the maximum/minimum values of these variables.