Dresden 2013 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 77: Hadronenstruktur und -spektroskopie

HK 77.6: Vortrag

Donnerstag, 7. März 2013, 18:15–18:30, HSZ-304

Hadron Identification with Time-of-Flight Method at COMPASS — •Nicolas du Fresne von Hohenesche — Institut für Kernphysik, Mainz, Deutschland

An import study of the COMPASS experiment is the extraction of fragmentation functions from pion and kaon multiplicities. Semi-inclusive deep inelastic scattering (SIDIS) is measured with a 160 GeV muon beam on a fixed target. The charged hadrons are identified with the RICH, a Ring Imaging CHerenkov detector. Depending on the refractive index of the filling gas, kaons, pions and proton can be identified only in a limited momentum range between 10 and 50 GeV.
In 2010, an additional trigger hodoscope was installed in front of the RICH, here not only to detect scattered muons but also low momentum hadrons due to the good time resolution of the scintillator slabs. With an offline method, the time-of-flight is calculated thus allows the identification of the low momentum tracks.
Supported by BMBF