Determination of quark masses: the contribution of eta -> 3 pi
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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
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.
The agenda of this meeting is empty