What is "dafne"

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 . 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 . The hypernuclei are produced by negatively charged kaons 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.

Die Dafne (1627) to a libretto by Martin Opitz (which survives), and music by Heinrich Schütz (which is lost), has traditionally been regarded as the first German opera, though it has also been proposed more recently that it was in fact a spoken drama with inserted song and ballet numbers.

Dafne may refer to:

• Dafne, a 1597 opera by Jacopo Peri
• La Dafne, a 1608 opera by Marco da Gagliano
• Dafne (Opitz–Schütz), a 1627 opera by Martin Opitz and Heinrich Schütz
• DAFNE, a particle collider in Italy
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