Graduate Seminar, 30th May

Speaker: Oleg Shkola

Title : Search for charged massive particles with a disappearing track signature at CMS

Abstract: Among different scenarios of the supersymmetry breaking, Anomaly-Mediated SUSY Breaking (AMSB) predicts a small mass splitting between the lightest neutralino and chargino. Then chargino can decay into neutralino  and a low-momentum pion. If chargino decays in a tracker this leads to a disappearing track. In the presentation I will show how in the CMS detector we can reconstruct disappearing tracks. I will also present results as limits on the chargino mass and its mean lifetime for direct electroweak chargino-chargino and chargino-neutralino production.