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.[1][2] It consists of 2 accelerator rings, both approximately 100 meters in length. 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 have been five experiments at DAFNE:

* KLOE (K LOng Experiment), led by Juliet Lee-Franzini[3], which studied CP violation in kaon decays and rare kaon decays from 2000 to 2006[4]. This experiment was followed by the KLOE-2 experiment.
* 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 (K−) 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 (DAΦNE-L) 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.

[ ⚑ ]  41°49′26″N 12°40′19″E﻿ / ﻿41.82391146°N 12.67203691°E﻿ / 41.82391146; 12.67203691

## References

1. ↑ "INSPIRE". https://inspirehep.net/experiments/1609165.
2. ↑ "DAΦNE, THE ELECTRON POSITRON Φ-FACTORY AT INFN-FRASCATI". 1995. https://www.lnf.infn.it/acceleratori/dafne/PUBLICATIONS/EPS95.pdf.
3. ↑ "Science" (in en). doi:10.1126/science.284.5414.568b. https://www.science.org/action/cookieAbsent.
4. ↑ Franzini, Paolo; Moulson, Matthew (2006-11-23). "The Physics of DAΦNE and KLOE" (in en). Annual Review of Nuclear and Particle Science 56: 207–251. doi:10.1146/annurev.nucl.56.080805.140459. ISSN 0163-8998. https://www.annualreviews.org/content/journals/10.1146/annurev.nucl.56.080805.140459.

## External links

* Accelerator division of Frascati National Laboratory (public, Italian)
* Accelerator division of Frascati National Laboratory (technical)

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