Séminaire spécialisé

jeudi 3 juillet 2014 à 12:30


Medium hadronization studies with CLAS/CLAS12 and more

Hayk Hakobyan

Universidad Tecnica Federico Santa Maria (Valparaiso, Chili)

In the presentation I will give a brief introduction to different experimental physics activities carried out in Centro Científico Tecnológico de Valparaiso (CCTVAL) in Universidad Técnica Federico Santa Maria, Valparaiso Chile, which includes collaborative research activities carried out in different international labs as well as detector and detector component design and fabrication. After I will go to the main subject of the presentation and will talk about the medium induced hadronization studies with CLAS/CLAS12 detector at Jefferson lab, Newport News, VA. Atomic nuclei can be used as spatial analyzers of the hadronization process in semi-inclusive deep inelastic scattering. The results of analysis for the Eg2 experimental data where electrons and positive pions were measured from a 5 GeV electron beam incident on targets of liquid deuterium, C, Fe, and Pb using CLAS in Hall B will be described. The broadening of the transverse momentum and the hadronic multiplicity ratio of positive pions has been studied in detail as a function of multiple kinematic variables. Some interpretation in terms of the transport of the struck quark through the nuclear systems will be discussed as well. In the end I will mention some future experiments with polarized targets.