[SEMINARI]: Dr. Tung: Testing the Standard Model with e+ e- collisions: Part 2

[Arcadi Santamaria]

Please note the change in the location of the seminar.
------------ próxima parte ------------
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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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             Testing the Standard Model with e+ e- collisions: Part 2

                             Dr. Michael M. Tung
                   (ITP, State Univ. of NY at Stony Brook)
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                         Aula 4113 en Primera Planta
                   Thursday 25 of June of 1998 at 12:00
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                                    Resum
   We consider $e^+e^-$ annihilation into massive quarks due to photon and
$Z$--boson exchange, and present a general technique to compute analytically
 one-loop QCD corrections of the relevant production rates and asymmetries.
 Particularly interesting observables are the forward-backward asymmetry and
spin-spin correlations for the massive quarks, especially for the top. These
 $O(\alpha_s)$ corrections are typically of the order of 3--$5 \%$. In this
  exposition, we first treat the fully analytical derivation of the virtual
   and real QCD corrections with massive quarks for this process. For the
virtual corrections, this involves form factors in the quark-gluon vertices.
  Then, the basic techniques are explained to tackle the more involved real
(bremsstrahlung) corrections in terms of the phase-space integrals in closed
 analytical form. Finally, explicit analytical and numerical results for the
                observables under consideration are provided.
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