Speaker
Stefan Kluth
(Max-Planck-Institut fur Physik)
Description
A new method for a data driven determination of the mass of the top quark m_t is proposed. It uses in ttbar events selected in the lepton+jets decay mode the recently proposed distribution of R_t= m_t/m_W calculated from selected jet triplets associated with the hadronically decaying top quark. The jets stemming from the hadronic W decay are found either by requiring one b-tagged jet in the triplet or by associating the two closets jets in top rest frame with the W. The distribution of m_t from the same jet triplets is used to define sideband and signal regions. Events from the sidebands in m_t can be used to constrain the shape of the combinatorial background distribution in R_t. The MC@NLO Monte Carlo generator and a simple model for the dominant experimental effects are used to study the prospective performance of the method.
Author
Stefan Kluth
(Max-Planck-Institut fur Physik)
