R(s) and Z decay in order \alpha_s^4: complete results
High Energy Physics - Phenomenology
2012-10-15 v1
Abstract
We report on our calculation of the order \alpha_s^4 axial singlet contributions for the decay rates of the Z-boson as well as the vector singlet contribution to the cross section for electron-positron annihilation into hadrons. Together with recently finished O(\alpha_s^4) calculations of the non-signlet corrections [1,2], the new results directly lead us to the first complete O(\alpha_s^4) predictions for the total hadronic decay rate of the Z-boson and the ratio R(s).
Keywords
Cite
@article{arxiv.1210.3594,
title = {R(s) and Z decay in order \alpha_s^4: complete results},
author = {P. A. Baikov and K. G. Chetyrkin and J. H. Kühn and J. Rittinger},
journal= {arXiv preprint arXiv:1210.3594},
year = {2012}
}
Comments
8 pages, 1 figure. Contribution to Proceedings of "10th International Symposium on Radiative Corrections (Applications of Quantum Field Theory to Phenomenology)" - Radcor2011, September 26-30, 2011, Mamallapuram, India