Laboratory link : http://irfu.cea.fr/dphn/Phocea/Vie_des_labos/Ast/ast_visu.php?id_ast=2105
Antiproton-nucleus reactions can occur at rest or in flight. The reactions at rest, or almost (~100 eV - 1 keV), are notably used at the Antiproton Decelerator (AD) at Cern by different experiments (GBAR, ASACUSA, AEgIS, ALPHA, ATRAP,). At FAIR, the PANDA project (antiProton ANnihilation at DArmstadt) aims to study hypernuclei with in-flight reactions (~GeV). In both cases, reliable simulations are necessary for a good analysis of the results. This is where we propose to make our contribution.
The INCL calculation code (IntraNuclear Cascade Liège) developed at the CEA (Irfu/DPhN) processes hadron-nucleus reactions for energies up to 20 GeV. Recognized for its reliability, it has recently been extended to the production of strange particles and hypernuclei (with the help of the ABLA de-excitation code), and can also be used within the Geant4 transport code. The extension to antiproton-nucleus reactions will therefore make it possible to participate in PANDA’s studies on hypernuclei, with a first step of tests on data already available (obtained at LEAR), as well as in the experiments of the Antiproton Decelerator where the behaviour of anti-hydrogen atoms is studied.
In addition, INCL is able to treat nucleus-nucleus reactions when one of the nuclei is light (A <= 18). This could also be used to treat by extension reactions with anti-deuteron and anti-helium. The GAPS experiment (General Anti-Particle Spectrometer) aims precisely to measure the fluxes of these particles in cosmic radiation. Simulations are obviously necessary in this case and INCL could thus contribute to this.