Speaker
Kay Schönwald
(DESY)
Description
Using the method of massive operator matrix elements, we calculate the subleading QED initial state radiative corrections to the process $e^+ e^− \to \gamma^∗/Z^∗$ for the first three logarithmic contributions. The calculation is performed in the limit of large center of mass energies $s \gg m_e^2$.
These terms supplement the known corrections to $O(\alpha^2)$, which were completed recently. The newly calculated radiators can be expressed in terms of harmonic polylogarithms of argument $z$ and $(1−z)$ and in Mellin $N$-space by generalized harmonic sums.
Given the high precision at future colliders operating at very large luminosity, these corrections are important for concise theoretical predictions.
| Time Zone | Europe/Africa/Middle East |
|---|
Primary authors
Abilio De Freitas
(DESY - Zeuthen)
Mr
Jakob Ablinger
Prof.
Johannes Bluemlein
(DESY)
Kay Schönwald
(DESY)
