Hadronic tau decays and the strong coupling

Abril 18, 2018
De 11:00am hasta 12:00pm

IFT Seminar Room/Red Room

Specialist level
Speaker: 
Maarten Golterman
Institution: 
San Francisco State University
Location&Place: 

IFT Seminar Room/Red Room

Abstract: 

I will discuss our recent determination of the strong coupling from hadronic tau
decays, as measured by ALEPH and OPAL.   This determination is controversial,
because the rather low tau mass makes it necessary to disentangle
non-perturbative effects that "contaminate" perturbation theory.   In particular,
I will consider effects due to the violation of quark-hadron duality.