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Hadronic physics studies the structure, the properties and the
interactions of the hadrons in terms of quarks and gluons. The
underlying theory is the Quantum Chromo-Dynamics (QCD) which, according
to the domains of energy/distance, baryonic density, temperature… leads
to a multitude of phenomena : from the confinement of quarks and gluons
inside the nucleons which form ordinary matter, to the quark gluon
plasma where the latter appear as a soup of (quasi-) free elementary
particles.
In the domain of nucleon structure, an important experimental
program which has been conducted for many years at the electron
accelerator of the Jefferson Lab (USA) with its 6 GeV beam and which
will be continued with its upgrade at 12 GeV, consists in measuring the
Generalized Parton Distributions (DVCS experiments) which characterize
the momentum-position correlations of the quarks inside the nucleon.
The HADES experiment (at GSI, Germany), with several GeV heavy ions
beam on fixed targets and the detection of leptons pairs, aims at
measuring the effect of the nuclear medium on the properties of hadrons.
IPN Orsay is involved in the PANDA collaboration with the goal, in
particular, of measuring the time-like electromagnetic form factors of
the proton.
At extremely high temperatures and energies (several TeV), the ALICE
experiments, following the NA50 and PHENIX experiments, studies the
quark-gluon plasma.
Institut de Physique Nucléaire Orsay - 15 rue Georges CLEMENCEAU - 91406 ORSAY (FRANCE) |
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