Abstract
Studies of light mesons in experiments with the Belle detector at the KEKB B-factory are described. Three types of hadron production processes are discussed: two-photon production, production via initial state radiation and hadronic tau lepton decays.
Highlights
Experiments with the Belle detector [1] at the asymmetricenergy e+e− KEKB collider [2] were performed from 1999 to 2010 in the centre-of-mass energy range within the Υ-meson family
The detector contains a silicon vertex detector (SVD), a 50-layer central drift chamber (CDC), an array of 1188 aerogel threshold Cherenkov counters (ACC), a barrel-like arrangement of time-of-flight scintillation counters (TOF), and an electromagnetic calorimeter (ECL) comprised of 8736 CsI(Tl) crystals located inside a superconducting solenoid coil that provides a 1.5 T magnetic field
Another important study is a determination of the π0 transition form factor (TFF) from the process γγ∗ → π0, where γ∗ is a virtual photon with large 4-momentum square, Q2
Summary
Experiments with the Belle detector [1] at the asymmetricenergy e+e− KEKB collider [2] were performed from 1999 to 2010 in the centre-of-mass energy range within the Υ-meson family. In these experiments the KEKB collider achieved the world highest collider luminosity, 2.1 × 1034cm−2s−1. The primary goal of the Belle experiment was to discover CP violation (CPV) in B meson decays and to measure the parameters of CPV. This was achieved in 2001, when the time-dependent CP asymmetry was observed in the decay B0 → J/ΨK0 decay [3]. Studies of light mesons performed in the first three processes will be discussed
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