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    by Pietro Antonio GRASSI (New York University)

    → Europe/Zurich
    TH Auditorium (CERN)

    TH Auditorium

    CERN
    Description
    A practical approach is presented which allows the use of a non-invariant regularisation scheme for the computation of quantum corrections in perturbative quantum field theory. Combining the effect of intermediate renormalization prescription (zero momentum subtraction) and the background field method (BFM), the algebraic renormalization procedure is definitely simplified. The present technique is suitable for gauge models and it is applied to the Standard Model. The use of BFM allows a powerful organisation of counterterms that avoids complicated Slavnov-Taylor identities. Furthermore, the BRST variation of background fields plays a special role in disentangling Ward-Takahashi Identities and Slavnov-Taylor identities. Finally, the strategy for application to physical processes is formulated with the help of an example.