Abstract
The new version of the DIZET electroweak library is described. Changes and additional code features concerning the previous version are explained. The software allows one to make state-of-the-art theoretical predictions for pseudo-observable quantities, including higher-order radiative corrections. The current version of the DIZET library v. 6.45 incorporates advanced recent results of theoretical calculations. Numerical comparisons with the results of the previous version are performed. Estimates of theoretical uncertainties are discussed. Program summaryProgram Title:DIZET version 6.45CPC Library link to program files:https://doi.org/10.17632/2fr58v92xc.1Code Ocean capsule:https://codeocean.com/capsule/0198682Licensing provisions: GPLv3Programming language: FORTRAN 77/90External routines: AlphaQED http://www-com.physik.hu-berlin.de/~fjeger/software.htmlJournal reference of previous version: Comput. Phys. Commun. 59 (1990) 303Does the new version supersede the previous version?: YesReasons for the new version: Implementation of new options.Summary of revisions: Implemented the complete electroweak two-loop radiative corrections to all the relevant electroweak precision pseudo-observables related to the Z-boson decay. Added support of new library for hadronic contribution to vacuum polarization.Nature of problem: The Z-resonance region is still extremely important for the experimental verification of the Standard Model. The anticipated experimental accuracy on a large variety of observables has to be matched with theory predictions of at least the same level of accuracy to achieve maximum usage of experimental data.Solution method: Theoretical calculations at NNLO in perturbation theory allow to compute higher precision pseudo-observables to verify the Standard Model at high luminosity future colliders. The package includes electroweak two-loop corrections calculated in the on-mass shell renormalization scheme. Pseudo-observables and electroweak form-factors can be calculated in a wide range of input parameters.Additional comments including restrictions and unusual features: The estimate of results at the off-resonance region should be treated with caution as two-loop electroweak corrections were calculated for the Z-resonance peak.
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