[Jlab-seminars] Theory Center Seminar

[Mary Fox]

Theory Center Seminar
Monday, Nov. 25, 2013
1:00 p.m. (coffee at 12:45 p.m.)
CEBAF Center, Room L102

Emilie Passemar
Los Alamos National Laboratory

*Eta -> 3 pi and Light Quark Masses *

Recently, several experimental collaborations have invested considerable 
effort into new and more precise measurements of the eta -> 3 pi decays. 
These experimental advances require revisiting the corresponding 
theoretical analyses. In this talk, we present a new calculation of the 
eta -> 3 pi decay amplitude relying on dispersive methods. We show how 
the study of this decay allows one to extract a fundamental parameter of 
the Standard Model, namely the quark mass ratio 
(m_d^2-m_u^2)/(m_s^2-\hat{m}^2), with good precision. We then discuss 
the possibility of extracting the individual light quark masses.

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