L. Kalinovskaya

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We present a description of calculations of the electroweak amplitude for e+e− → tt̄ process. The calculations are done within the OMS (on-mass-shell) renormalization scheme in two gauges: in Rξ, which allows an explicit control of gauge invariance by examining cancellation of gauge parameters and search for gauge-invariant subsets of diagrams, and in the(More)
Recently exact results for the complete electroweak two-loop contributions to the effective weak mixing angle were published. This paper illustrates the techniques used for this computation, in particular the methods for evaluating the loop diagrams and the proper definition of Z-pole observables at next-to-next-to-leading order. Numerical results are(More)
The project, aimed at the theoretical support of experiments at modern and future accelerators — TEVATRON, LHC, electron Linear Colliders (TESLA, NLC, CLIC) and muon factories, is presented. Within this project a four-level computer system is being created, which must automatically calculate, at the one-loop precision level the pseudoand realistic(More)
We present a description of calculations of the electroweak amplitude for e+e− → tt̄ process. The calculations are done within OMS renormalization scheme in two gauges: Rξ, which allows to explicitly control gauge invariance by examining cancellation of gauge parameters and search for gauge invariant subsets of diagrams; and in the unitary gauge as a(More)
In this paper we complete a description of calculation of the one-loop amplitude for e+e− → f f̄ process started in CERN-TH/2001-308. This study is performed within the framework of the project CalcPHEP. Here we add QED subsets of the one-loop diagrams and the soft-photon contribution. The formulae we derived are realized in two independent FORTRAN codes,(More)
The atomic parity-violation (APV) parameter QW for a nucleus with n neutrons and z protons has been included in the list of pseudo-observables accessible with the codes TOPAZ0 and ZFITTER. In this way one can add the APV results in the LEP EWWG ‘global’ electroweak fits, checking the corresponding effect when added to the existing precision measurements. †(More)
The CalcPHEP collaboration joins the efforts of several groups of theorists known very well in the field of theoretical support of various experiments in HEP, particularly at SLAC and LEP, (see, for instance [1], [2] and [3]). The first phase of the CalcPHEP system was realized in the site http://brg.jinr.ru/ in 2000–2001. It is written mostly in FORM3,(More)
I review progress on investigations concerning top quark physics and QCD at a future linear e+e collider that has been achieved since the presentation of the TESLA technical design report [1] in spring 2001. I concentrate on studies that have been presented during the workshop series of the Extended Joint ECFA/DESY Study on Physics and Detectors for a(More)