Determination of quark masses: the contribution of eta -> 3 pi

Europe/Rome
Aula Bruno Touschek (Laboratori Nazionali di Frascati, Via Enrico Fermi 40, Frascati)

Aula Bruno Touschek

Laboratori Nazionali di Frascati, Via Enrico Fermi 40, Frascati

Via Enrico Fermi 40 00044 Frascati
Description
ABSTRACT

I will review the current status of the determination of the light quark masses, concentrating in particular on those based on lattice calculations. I will then discuss how the analysis of the process $\eta \to 3 \pi$ allows one to extract clean information about the isospin-violating mass ratio $Q$: \[ \frac{1}{Q^2}=\frac{m_d^2-m_u^2}{m_s^2-\hat m^2} \; , \] which is complementary to current lattice calculations. I will give details about a dispersive treatment of this decay which we are carrying out and discuss future plans about how to include also a treatment of isospin-breaking effects.

Slides
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