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 …

We address the contribution of the 3 π channel to hadronic vacuum polarization (HVP) using
a dispersive representation of the e+ e−→ 3 π amplitude. This channel gives the second …

We present a detailed analysis of e+ e−→ π+ π− data up to s= 1 GeV in the framework of
dispersion relations. Starting from a family of ππ P-wave phase shifts, as derived from a …

At low energies hadronic vacuum polarization (HVP) is strongly dominated by two-pion
intermediate states, which are responsible for about 70% of the HVP contribution to the …

The full LEP-1 data set collected with the ALEPH detector at the Z pole during 1991–1995 is
analysed in order to measure the τ decay branching fractions. The analysis follows the …

A higher precision measurement of the anomalous g value, a μ=(g-2)/2, for the positive
muon has been made at the Brookhaven Alternating Gradient Synchrotron, based on data …

A bstract Isospin-breaking (IB) effects in the two-pion contribution to hadronic vacuum
polarization (HVP) can be resonantly enhanced, if related to the interference of the ρ (770) …

The resonant substructures of B 0→ D¯ 0 π+ π-decays are studied with the Dalitz plot
technique. In this study a data sample corresponding to an integrated luminosity of 3.0 fb-1 …

The updated results of the precise measurements of the processes e+ e−→ ρ→ π+ π−, e+
e−→ ω→ π+ π− π0 and e+ e−→ φ→ K0LK0S performed by the CMD-2 Collaboration are …