Eta --> 3 pi and quark masses

Abstract

In recent years, the decay eta --> 3 pi has received considerable attention from experimental and theoretical side. It is of particular theoretical interest because it allows for the determination of (m_u - m_d). In addition, for many years now theory has had difficulties to understand the slope of the neutral channel Dalitz plot distribution, which in contrast is very well measured. I discuss here the relation of the decay to the masses of the light quarks and review a number of theoretical and experimental works that are concerned with these questions.

15 pages, 5 figures, plenary talk presented at The 7th International Workshop on Chiral Dynamics, August 6 -10, 2012, Jefferson Lab, Newport News, Virginia, USA

References in corpus (9)

• $\eta \to 3\pi$ at Two Loops In Chiral Perturbation Theory
• Radiative corrections in K --> 3 pi decays
• Analytical dispersive construction of $\eta \to 3\pi$ amplitude: First order in isospin breaking
• Cusps in K_L --> 3 pi decays
• Determination of the Dalitz plot parameter alpha for the decay eta->3pi^0 with the Crystal Ball at MAMI-B
• Measurement of the Slope Parameter for the eta->3pi0 Decay in the pp->pp eta Reaction
• Electromagnetic contributions to pseudoscalar masses
• Proceedings of the second International PrimeNet Workshop
• Determination of the quark mass ratio $Q$ from $\eta \to 3\pi$

Cited by in corpus (2)

• The mass of the two lightest quarks
• Dispersive Treatments of $K_{\ell 4}$ Decays and Hadronic Light-by-Light Scattering