[SEMINARI]: Dr. Czarnecki: Perturbative calculations with heavy quarks: new methods and results

[Arcadi Santamaria]

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                              S E M I N A R I

            [Image]    Departament de Física Teòrica     [Image]
                          Universitat de València
                      46100 Burjassot (València) Spain

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       Perturbative calculations with heavy quarks: new methods and results

                            Dr. Andrzej Czarnecki

                    (Brookhaven National Laboratory, NY)

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                     Aula de Seminaris de Física Teòrica
                  Monday 07 of September of 1998 at 12:00
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                                    Resum

   Recently the first results have been obtained for 2-loop corrections to
     charged particle decays: t-->Wb and semileptonic b-->c transitions.
Applications to the V_{cb} determination will be presented. Also the leading
electroweak corrections to b-->s+gamma will be discussed. Techniques of such
   calculations will be described, including methods of computing Feynman
    diagrams such as eikonal and threshold expansions. These methods are
applicable to the description of production, scattering, and decays of heavy
    quarks. Further applications and open questions will be discussed, in
           particular in the bound state problems of QCD and QED.

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