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Next-to-Leading QCD and Finite Lifetime Effects in e+e− → t¯tH

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Next-to-Leading QCD and Finite Lifetime Effects in e+e− → t¯tH (English shop)

Cailin Farrell (Author)

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One important task of the International Linear Collider (ILC) will be to determine
the couplings of the Higgs boson. Since the top-quark is so heavy,
the top Yukawa coupling is an especially interesting quantity. It is measured
via top-pair associated Higgs production. Within the effective theory velocity
Non-Relativistic QCD (vNRQCD) we calculated the next-to-leading
logarithmic (NLL) QCD corrections as well as the NLL finite lifetime effects,
which are relevant for the first phase of the ILC with a collision energy of
500GeV. The results show a strong enhancement of the total cross section
relative to the naive Born computation and indicate a theoretical uncertainty
of approximately 5% for the top Yukawa coupling measurement.

ISBN-13 (Printausgabe) 386727732X
ISBN-13 (Hard Copy) 9783867277327
ISBN-13 (eBook) 9783736927322
Language English
Page Number 176
Edition 1 Aufl.
Volume 0
Publication Place Göttingen
Place of Dissertation TU München
Publication Date 2008-09-05
General Categorization Dissertation
Departments Physics