| 释义 |
- External links
{{About|the Italian electron–positron collider|the French collider DAPHNE|Détecteur à Grande Acceptance pour la Physique Photonucléaire Expérimentale|other uses|Dafne (disambiguation)}}DAFNE or DAΦNE (Double Annular Φ Factory for Nice Experiments), is an electron-positron collider at the INFN Frascati National Laboratory in Frascati, Italy. Since 1999 it has been colliding electrons and positrons at a center of mass energy of 1.02 GeV to create phi mesons (φ). 85% of these decay into kaons (K), whose physics is the subject of most of the experiments at DAFNE. There are five experiments at DAFNE: - KLOE (K LOng Experiment), which has been studying CP violation in kaon decays and rare kaon decays since 2000. This is the largest of DAFNE experiments.
- FINUDA (FIsica NUcleare a DAFNE), studies the spectra and nonmesonic decays of hypernuclei containing Lambda baryons (Λ). The hypernuclei are produced by negatively charged kaons ({{Subatomic particle|Kaon-}}) striking a thin target.
- DEAR (DAFNE Exotic Atoms Research experiment), determines scattering lengths in atoms made from a kaon and a proton or deuteron.
- DAFNE Light Laboratory consists of 3 lines of synchrotron radiation emitted by DAFNE, a fourth is under construction.
- SIDDHARTA (SIlicon Drift Detectors for Hadronic Atom Research by Timing Application), aims to improve the precision measurements of X-ray transitions in kaon atoms studied at DEAR.
External links- Homepage of the accelerator division of Frascati National Laboratory: public (Italian), technical
{{coord missing|Italy}}{{DEFAULTSORT:Dafne}}{{particle-stub}} 3 : Particle physics facilities|Particle experiments|Research institutes in Italy |