Eur. Phys. J. Special Topics 198, 117-131 (2011)
https://doi.org/10.1140/epjst/e2011-01486-y

Review

η and η′ Physics at MAMI

University of California, Los Angeles, USA

^a e-mail: starost@ucla.edu

Received: 8 July 2011
Revised: 21 July 2011
Published online: 23 September 2011

Abstract

Decays of the η and the η′ represent a significant portion of the scientific program with the Crystal Ball at MAMI. This review summarizes the current status of the program and discusses some recent results, such as the slope parameter of the η → 3π⁰ Dalitz plot, the matrix element of η → π⁰γγ and the invariant mass of e⁺e⁻γ from the η → e⁺e⁻γ Dalitz decay. Possible future measurements are discussed.