We review the present status of the Standard Model calculation of the anomalous magnetic
moment of the muon. This is performed in a perturbative expansion in the fine-structure …

Glueballs, hybrids and multiquark states are predicted as bound states in models guided by
quantum chromo dynamics (QCD), by QCD sum rules or QCD on a lattice. Estimates for the …

Decays of the neutral and long-lived η and η′ mesons provide a unique, flavor-conserving
laboratory to test low-energy Quantum Chromodynamics and search for new physics …

Vacuum polarization integrals involve the vector spectral functions which can be
experimentally determined from two sources:(i) e+ e-annihilation cross sections and (ii) …

We calculate g− 2 of the muon and the QED coupling α (MZ 2), by improving the
determination of the hadronic vacuum polarization contributions and their uncertainties. We …

We update the values of the η-η'mixing angle and of the η'gluonium content by fitting our
measurement R ϕ= BR (ϕ→ η'γ)/BR (ϕ→ ηγ) together with several vector meson radiative …

Radiative decays of the φ meson have been studied using a data sample of about 19 million
φ decays collected by the CMD-2 detector at VEPP-2M collider in Novosibirsk. From …

The muon anomalous magnetic moment a μ and the hadronic vacuum polarization are
examined using data analyzed within the framework of a suitably broken HLS model. The …

The cross section of the process e+ e−→ ωπ0→ π0π0γ has been measured in the cm
energy range 920–1380 MeV with the CMD-2 detector. Its energy dependence is well …

A bstract In this paper, we study the processes of e+ e− annihilation into two body final
states, either two pseudoscalar mesons or one meson with a photon. The hadronic vacuum …