The KLOE experiment is situated at the φ factory DAφNE in Frascati. φ radiative decays have been used to investigate the properties of the light scalar mesons f0(980)/a0(980), whose structure is still controversial. Off-peak data allow to investigate γ γ interaction with a consequent scalar/pseudoscalar meson production. From the large sample of the η and η ′ produced in φ → η γ decay we have studied several η and η ′ decays relevant to η /η ′ mixing, η ′ gluonium content, CP violation searches and tests of ChPT. For the hadronic cross section, the pion form factor in the Mππ invariant mass range (0.592-0.975)GeV has been determined and used in the evaluation of the hadronic contribution to the muon anomaly. The result confirms the 3-σ discrepancy between SM expectation and the measurement of the muon (g - 2) by the E821 experiment at the BNL.
Low energy QCD and ChPT studies with KLOE
Martini M;Meola S;
2012-01-01
Abstract
The KLOE experiment is situated at the φ factory DAφNE in Frascati. φ radiative decays have been used to investigate the properties of the light scalar mesons f0(980)/a0(980), whose structure is still controversial. Off-peak data allow to investigate γ γ interaction with a consequent scalar/pseudoscalar meson production. From the large sample of the η and η ′ produced in φ → η γ decay we have studied several η and η ′ decays relevant to η /η ′ mixing, η ′ gluonium content, CP violation searches and tests of ChPT. For the hadronic cross section, the pion form factor in the Mππ invariant mass range (0.592-0.975)GeV has been determined and used in the evaluation of the hadronic contribution to the muon anomaly. The result confirms the 3-σ discrepancy between SM expectation and the measurement of the muon (g - 2) by the E821 experiment at the BNL.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
