Thesis


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Academic Year
2010 / 2011
Title
Measurement of the top quark decay rate in the Ws channel in ATLAS/LHC
Domain
Experimental Particle Physics
Abstract
The study of the top quark decay into a W boson and a s-quark, in particular the direct measurement of the top quark decay rate on this channel, will constrain the CKM mixing matrix, in an independent way of the matrix unitarity condition, with possible clues for physics beyond the Standard Model and about the existence of a fourth fermion family. The present measurement starts with the reconstruction of the top quark decay and the identification of s-quark jets, namely from the production of long lived mesons with s-quarks.\
In the present work it will be developed signal selection and background rejection algorithms. which will be used both with simulated and real data acquired by the ATLAS experiment at LHC. The work will also stress the estimation and minimization of the systematic errors associated with this measurement.
Institution
grants the Degree
U. Coimbra
Host Institution
LIP-Coimbra
Supervisor
Joao Carvalho
Co-Supervisor