On Apr 19, 2013, at 10:17 AM, Jens Erler <[log in to unmask]> wrote:

> Hi,
> 
> I also see alpha_s less of a concern.  The alpha_s value from the Z-lineshape has
> currently a negligible theory error, so it is especially here that I would expect great
> improvement.  If one then also gets alpha_s to per mille precision from event shapes, 
> one would even gain another independent EW observable to very high precision. 
> But one needs a plausible avenue to credibly improve Delta alpha (M_Z)


what about computing Delta alpha (MZ) using lattice QCD for the non-perturbative hadronic loops?

regards,
Ashutosh
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