Standard Model Background Analysis for Single Lepton Channel

Authors : Buğra YILDIZ, Muge BOZ

Pages : 37-42

Doi:10.35414/akufemubid.1182938

View : 9 | Download : 6

Publication Date : 2023-03-01

Article Type : Research Paper

Abstract :Since protons are not fundamental particles, they produce very large backgrounds in proton-proton collisions. Therefore, in supersymmetry searches, the main challenge is to differentiate supersymmetric signals from Standard Model background. Hence, extensive background analysis becomes an important probe to obtain information in the direction of supersymmetry searches. Among the variety of signatures in this direction, single lepton channel is one of the effective processes in which Standard Model background is obtained. In this work, starting from the generation of background emerging from various events, basic selections and cuts have been applied to obtain a homogenous and a clean sample. On the other hand, the magnitude of missing transverse energy and scalar sum of all transverse momentums are crucial to detect particles that can escape without leaving trace in the detector. Therefore, all necessary histograms have been plotted. Emerging the leading backgrounds from W-bosons + jets and top quark-antiquark + jets events, almost all energy regions, it is seen that W+jets have greater contribution to background. However, for the collisions that produce high number of jets top quark-antiquark + jets become more dominant. Final step of the work is the application of additional selections and cuts for the isolation of potential supersymmetry signals.
Keywords : Süpersimetri, Standart Model, Tek lepton kanalı, Analiz