PARTON ENERGY LOSS ESTIMATES USING POSITIVE PIONS IN DIS ON NUCLEAR TARGETS (CLAS EG2-EXPERIMENT)

Abstract

Several models, both theoretical and experimental, have attempted to explain the process of hadronization.Some with more success than others. Using experimental data from the EG2 experiment onthe CLAS detector (Thomas Jefferson Laboratory), it was possible to measure the energy distributionof positive pions produced with a beam of 5 GeV incident electrons in a double target systemwith the aim of contrasting the nuclear medium with that produced in deuterium, which in practicalterms is considered as vacuum. Additionally, through the EG2 experiment it is sought to understandthe process of hadronization in the nuclear medium.In the present work, a model is developed to describe the process of hadronization in the nuclearmedium. This model explains the energy spectrum change of positive pions produced ondifferent nuclei. The studied nuclear medium (C, Fe, Pb) is compared to the spectrum produced byhadronization in deuterium nuclei. The complete modelling is done with realistic data, and additionan analysis is realized with the objective of finding characteristic values for ^q and L, parametersthat characterize the nuclear medium.