The decays of on-shell and off-shell polarized gauge bosons into massive quark pairs at NLO QCD

Abstract

We discuss the polar angle decay distribution in the decay of on-shell and off-shell polarized (W,Z) gauge bosons into massive quark pairs. In particular for the off-shell decays in $H\to (W,Z)+(W^{\ast },Z^{\ast })(\to q_1{\bar{q}}_2)$ it is important to keep the masses of the charm and bottom quarks at their finite values since the scale of the problem is not set by $m_{W,Z}^2$ but by the off-shellness of the gauge boson which varies in the range $(m_1+m_2{)}^2\le q^2\le (m_H-m_{W,Z}{)}^2$.

Comments: 5 pages, 2 figures, invited talk given by J.G. Körner at the 20th International Symposium on Spin Physics, September 17-22, 2012, Dubna Russia