HADRONIZATION STUDIES INTO ETA PARTICLES IN NUCLEAR MEDIUM WITH CLAS SPECTOMETER

Abstract

The confinement experienced by quarks does not allows to measure their individualcharacteristic isolated, they are always in colorless state. In order to extract informationabout them, Semi-Inclusive Deep Inelastic Scattering (SIDIS) measurements areperformed. In the analysed experiment, the measurement consist of an incoming andoutgoing electron, together with one hadron. The experiment E02-104, carried out atThomas Jefferson National Accelerator Facility (Newport news, VA), uses a doubletarget system including a liquid Deuterium target and a solid target, which are exposedtogether to the beamline, hence allowing to test the process of hadronization in a femtoscale. The observable measured is called Multiplicity Ratio, which is the ratio of themultiplicity of hadrons produced on a particular medium to the multiplicity producedon Deuterium.This thesis is focused in the measurement of the Multiplicity ratio of the Eta mesonon different nuclear environment (C,Fe,Pb) using the CLAS spectrometer.