Publications (15)
Complete Two Loop Electroweak Contributions to the Muon Lifetime in the Standard Model
M. Awramik, M. Czakon
An independent result for the two loop fermionic contributions to the muon lifetime in the Standard Model is obtained. Deviations are found with respect to \cite{Freitas:2000gg}, w…
Longitudinal top quark polarization
M. Awramik, M. Jezabek
Longitudinal polarization of the top quark, averaged over the production angle, is discussed for the top quark produced in e+e- annihilation near its production threshold. It is de…
Bosonic Corrections to at the Two Loop Level
M. Awramik, M. Czakon, A. Onishchenko +1
The details of the recent calculation of the two-loop bosonic corrections to the muon lifetime in the Standard Model are presented. The matching on the Fermi theory is discussed. R…
Bosonic Corrections to The Effective Weak Mixing Angle at O(alpha^2)
M. Awramik, M. Czakon, A. Freitas
We present the complete bosonic contributions to the effective weak mixing angle, $\seff$, at the two-loop level in the electroweak interactions. We find their size to be about thr…
Complete Two Loop Bosonic Contributions to the Muon Lifetime in the Standard Model
M. Awramik, M. Czakon
The last missing correction to the muon lifetime in the Standard Model at O(alpha^2) coming from gauge and Higgs boson loops is presented. The associated contribution to the parame…
Two-loop Fermionic Electroweak Corrections to the Effective Leptonic Weak Mixing Angle in the Standard Model
M. Awramik, M. Czakon, A. Freitas +1
We give some details of the recently completed calculation of the full two-loop fermionic corrections to the effective leptonic weak mixing angle. Among others, we describe the C++…
Two-loop electroweak fermionic corrections to sin^2 theta_{eff}^{b anti-b}
M. Awramik, M. Czakon, A. Freitas +1
We present the first calculation of the two-loop electroweak fermionic correction to the flavour-dependent effective weak-mixing angle for bottom quarks, sin^2 theta_{eff}^{b anti-…
Complete Two-Loop Electroweak Fermionic Corrections to sin^2(theta_eff) and Indirect Determination of the Higgs Boson Mass
M. Awramik, M. Czakon, A. Freitas +1
We present a complete calculation of the contributions to the effective leptonic weak mixing angle, sin^2theta_eff, generated by closed fermion loops at the two-loop level of the e…
ZFITTER: a semi-analytical program for fermion pair production in e+e- annihilation, from version 6.21 to version 6.42
A. B. Arbuzov, M. Awramik, M. Czakon +5
ZFITTER is a Fortran program for the calculation of fermion pair production and radiative corrections at high energy e+e- colliders; it is also suitable for other applications wher…
Towards Better Constraints on the Higgs Boson Mass: Two-Loop Fermionic Corrections to sin^2(theta_eff)
M. Awramik, M. Czakon, A. Freitas +1
The complete two-loop electroweak fermionic corrections to the effective leptonic weak mixing angle, sin^2(theta_eff), are now available. Here we shortly present the methods applie…
Precise Prediction for the W-Boson Mass in the Standard Model
M. Awramik, M. Czakon, A. Freitas +1
The presently most accurate prediction for the W-boson mass in the Standard Model is obtained by combining the complete two-loop result with the known higher-order QCD and electrow…
Indirect Determination of the Higgs Mass Through Electroweak Radiative Corrections
A. Freitas, M. Awramik, M. Czakon
Electroweak precision observables allow stringent tests of the Standard Model at the quantum level and imply interesting bounds on the mass of the Higgs boson through higher-order…
Bosonic corrections to the effective leptonic weak mixing angle at the two-loop level
M. Czakon, M. Awramik, A. Freitas
Details of the recent calculation of the two-loop bosonic corrections to the effective leptonic weak mixing angle are presented. In particular, the expansion in the difference of t…
Electroweak two-loop corrections to the effective weak mixing angle
M. Awramik, M. Czakon, A. Freitas
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 co…
Two Loop Electroweak Bosonic Corrections to the Muon Decay Lifetime
M. Awramik, M. Czakon
A review of the calculation of the two loop bosonic corrections to is presented. Factorization and matching onto the Fermi model are discussed. An approximate formula, descri…