JADE was a
particle detector
In experimental and applied particle physics, nuclear physics, and nuclear engineering, a particle detector, also known as a radiation detector, is a device used to detect, track, and/or identify ionizing particles, such as those produced by nuc ...
at the
PETRA
Petra ( ar, ٱلْبَتْرَاء, Al-Batrāʾ; grc, Πέτρα, "Rock", Nabataean Aramaic, Nabataean: ), originally known to its inhabitants as Raqmu or Raqēmō, is an historic and archaeological city in southern Jordan. It is adjacent to t ...
particle accelerator
A particle accelerator is a machine that uses electromagnetic fields to propel charged particles to very high speeds and energies, and to contain them in well-defined beams.
Large accelerators are used for fundamental research in particle ...
at the German national laboratory
DESY
The Deutsches Elektronen-Synchrotron (English ''German Electron Synchrotron''), commonly referred to by the abbreviation DESY, is a national research center in Germany. It operates particle accelerators used to investigate the structure of matt ...
in
Hamburg
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, timezone1 = Central (CET)
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. It was operated from 1979 to 1986. JADE's most important scientific achievement was the discovery of the
gluon
A gluon ( ) is an elementary particle that acts as the exchange particle (or gauge boson) for the strong force between quarks. It is analogous to the exchange of photons in the electromagnetic force between two charged particles. Gluons bind q ...
in
three-jet events
In particle physics, a three-jet event is an event with many particles in final state that appear to be clustered in three jets. A single jet consists of particles that fly off in roughly the same direction. One can draw three cones from the inter ...
. It also helped greatly in establishing
quantum chromodynamics
In theoretical physics, quantum chromodynamics (QCD) is the theory of the strong interaction between quarks mediated by gluons. Quarks are fundamental particles that make up composite hadrons such as the proton, neutron and pion. QCD is a type ...
. JADE is an acronym for Japan, Deutschland (Germany) and England, the three countries from which the participating universities originated. The JADE
jet chamber
A wire chamber or multi-wire proportional chamber is a type of proportional counter that detects charged particles and photons and can give positional information on their trajectory, by tracking the trails of gaseous ionization. was located via ...
is now exhibited in the physics lecture hall at the
University of Heidelberg
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Heidelberg University, officially the Ruprecht Karl University of Heidelberg, (german: Ruprecht-Karls-Universität Heidelberg; la, Universitas Ruperto Carola Heidelbergensis) is a public research university in Heidelberg, Baden-Württemberg, ...
. Although the last data with JADE were taken in 1986, analysis continued, with the most recent paper published in 2012.
In 1995, the
European Physical Society
The European Physical Society (EPS) is a non-profit organisation whose purpose is to promote physics and physicists in Europe through methods such as physics outreach. Formally established in 1968, its membership includes the national physical so ...
(EPS) awarded a "Special High Energy and Particle Physics Prize" to the JADE,
PLUTO
Pluto (minor-planet designation: 134340 Pluto) is a dwarf planet in the Kuiper belt, a ring of trans-Neptunian object, bodies beyond the orbit of Neptune. It is the ninth-largest and tenth-most-massive known object to directly orbit the S ...
,
TASSO
TASSO (Two Arm Spectrometer SOlenoid) was a particle detector at the PETRA particle accelerator at the German national laboratory DESY. The TASSO collaboration is best known for having discovered the gluon, the mediator of the strong interaction an ...
and
MARK-J collaborations at PETRA for ''"establishing the existence of the gluon in independent and simultaneous ways"''.
References
External links
A brief history of JADE at the ICEPP, JapanNew QCD tests with old JADE dataOld homepage of the JADE Revival ProjectJADE experiment
record on INSPIRE-HEP INSPIRE-HEP is an open access digital library for the field of high energy physics (HEP). It is the successor of the Stanford Physics Information Retrieval System (SPIRES) database, the main literature database for high energy physics since the 1970 ...
Particle experiments
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