Charge asymmetry and radiative phi decays

Abstract

The study of radiative phi decays into scalar mesons, with subsequent decay into pi pi gamma, constitutes an important topic at the electron-positron collider DAPHNE. The interference of the respective amplitude with the one for pi+ pi- gamma production, where the photon originates from initial state radiation, will allow for unambiguous tests of models for the phi -> gamma f0(-> pi pi) amplitude. The forward-backward asymmetry of charged pions, which is a clear signal of such an interference, amounts up to 30 % and is at the same time quite sensitive to the details of the various amplitudes. The results for several characteristic cases are presented and their implementation into the Monte Carlo generator PHOKHARA is described.

References in corpus (5)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• The radiative return at phi- and B-factories: small-angle photon emission at next to leading order
• The radiative return at phi- and B-factories: FSR at next-to-leading order
• J/psi production via initial state radiation in e+ e- --> mu+ mu- gamma at an e+e- center-of-mass energy near 10.6 GeV
• Towards a model independent determination of the phi -> f_0 - gamma coupling

Cited by in corpus (27)

• The anomalous magnetic moment of the muon in the Standard Model
• Two-pion contribution to hadronic vacuum polarization
• Three-pion contribution to hadronic vacuum polarization
• Quest for precision in hadronic cross sections at low energy: Monte Carlo tools vs. experimental data
• 50 Years of Quantum Chromodynamics
• Measurement of sigma(e+ e- -> pi+ pi-) from threshold to 0.85 GeV^2 using Initial State Radiation with the KLOE detector
• Study of the decay phi--> f0(980)g --> pi+pi-g with the KLOE detector
• Narrow resonances studies with the radiative return method
• Spin asymmetries and correlations in lambda-pair production through the radiative return method
• Four-pion production in tau decays and e+e- annihilation: an update
• Radiative corrections to the forward-backward asymmetry in $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}$
• The reaction e+e- --> e+e-pi+pi- and the pion form factor measurements via the radiative return method
• Measurement of ISR-FSR interference in the processes e+ e- --> mu+ mu- gamma and e+ e- --> pi+ pi- gamma
• Nucleon form factors and final state radiative corrections to $e^{+}{e}^{-}\to \bar{p}p\gamma$
• Initial State Radiation: A success story
• Test of FSR in the process $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}\gamma$ at DA$\Phi$NE and extraction of the pion form factor at threshold
• Final state radiation and a possibility to test a pion-photon interaction model near two-pion threshold
• Measurement of the pion form factor for M_{pipi}^2 between 0.1 and 0.85 GeV^2 with the KLOE detector
• FASTERD: a Monte Carlo event generator for the study of final state radiation in the process $e^{+}{e}^{-}\to \pi \pi \gamma$ at DA$\Phi$NE
• The radiative return method - a short theory review
• From Hadronic Cross Section to the measurement of the Vacuum Polarization at KLOE: a fascinating endeavour
• Asymmetry observables in e+ e- --> pi+ pi- gamma in the phi region within a chiral unitary approach
• Charge asymmetries in e+e- -> pi+ pi- gamma at the phi resonance
• Status of Phokhara
• PHOKHARA, the radiative return and the $(g-2{)}_{\mu }$ puzzle
• PHOKHARA 7.0 Monte Carlo generator: the narrow resonances implementation and new pion and kaon form factors
• Strong interaction between kaons in the reactions e+ e- --> K+ K- gamma and e+ e- --> K0 K0bar gamma