Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-03-18
Physics
High Energy Physics
High Energy Physics - Phenomenology
Ph.D. thesis, 28 October 1996 (Valencia U.). 109 pages, LaTeX. Uses amsbook
Scientific paper
The effects induced by the quark masses in three-jet observables have been studied in this thesis. In particular, we have explored a new method: the study of three-jet observables at LEP, different from QCD Sum Rules and Lattice calculations, for determining the b-quark mass. Among other advantages, it would allow to extract the b quark mass far from threshold, in contrast to the other methods described above and it would provide a test of the QCD Renormalization Group predictions. From our NLO calculation, we have estimated, by exploring the $\mu$-dependence of our prediction at m_Z, a theoretical b-quark mass uncertainty of at most 250(MeV) in the DURHAM algorithm, 300(MeV) for JADE and EM and 500(MeV) for the E algorithm. Furthermore, quark mass effects are expected to be quite more important in top production at NLC (Next Linear Collider) and our calculation would be of a great interest.
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