Speaker
Prasanth Shyamsundar
(University of Florida)
Description
We investigate the solvability of the event kinematics in missing energy events at hadron colliders, as a function of the particle mass ansatz. To be specific, we reconstruct the neutrino momenta in dilepton $t\bar{t}$-events, without assuming prior knowledge of the top, W and neutrino masses. We identify a class of events, which we call extreme events, with the property that the boundary of their allowed region in mass parameter space passes through the true mass point. We show that the collection of such extremeness boundaries is focused on the true values of the mass parameters and can be effectively used for mass determination. We derive a kinematic variable which allows us to recognize a given event as extreme.
Authors
Dr
Doojin Kim
(Theory Division, CERN)
Prof.
Konstantin Matchev
(University of Florida)
Prasanth Shyamsundar
(University of Florida)
