Speaker
Rainer Sommer
(NIC, DESY)
Description
I discuss the status of different determinations of alpha_s,
motivating a precise and reliable computation from lattice
QCD. In order to suppress perturbative errors, the non-perturbative
computation has to reach high energy scales mu. Such results already
exist in the SF-scheme for Nf=0,2,3 . We now add the running with
four massless flavours in a range of alpha from about 0.07 to
0.3 . It is based on our recent determination of the Sheikholeslami
Wohlert coefficient in the four-flavour theory.
| Please, insert your presentation type (talk, poster) | talk |
|---|
Primary author
Rainer Sommer
(NIC, DESY)
Co-authors
Mr
Fatih Tekin
(Humboldt University Berlin)
Prof.
Ulli Wolff
(Humboldt University Berlin)
