Hadronic tau decays and the strong coupling

April 18, 2018
11:00am to 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.