Public Note / PHYSTH / SIM ILC-NOTE-2008-042

PAIR PRODUCTION OF SCALAR TOP QUARKS IN e+e- COLLISIONS AT ILC

Bartl A. (University of Vienna, Faculty of Physics, 1090 Vienna, Boltzmanngasse 5, Austria; AHEP Group, Instituto de Fisica Corpuscular - C.S.I.C., Universidad de Valencia, Edificio Institutos de Investigacion, Apt. 22085, E-46071 Valencia, Spain.) ; Majerotto W. (Institute for High Energy Physics (HEPHY Vienna), Nikolsdorfergasse 18, A-1050 Vienna, Austria.) ; Moenig K. (DESY, Platanenallee 6, D-15738 Zeuthen, Germany.) ; Skachkova A.N. (JINR, Joliot-Curie 6, 141980 Dubna, Moscow region, Russia.) ; Skachkov N.B. (JINR, Joliot-Curie 6, 141980 Dubna, Moscow region, Russia.)

Abstract: We study the pair production of scalar top quarks in e+e- collisions with the subsequent decay of the top squarks into b-quarks and charginos. We simulate this process using PYTHIA6.4 for beam energies 2E_beam = 350, 400, 500, 800, 1000 GeV. Proposing a set of criteria we obtain a good separation of the signal stop events from top quark pair production which is the main background. The number of stop production events obtained with the proposed cuts for different energies is calculated for an integrated luminosity of 1000 1/fb. We propose a method to reconstruct the mass of the top squark, provided the mass of the lightest neutralino is known, and estimate the error of the mass determination for the case sqrt{s} = 500 GeV.

Note: arXiv:0804.2125

The record appears in these collections:
Physics & Detectors > Physics Analysis & Software > Simulation
Physics & Detectors > Physics Theory > Physics Theory General
Documentation > Publications & Notes > ILC Notes

 

 Record created 2008-04-14, last modified 2010-07-26


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