Unit:
Κατεύθυνση Πυρηνική Φυσική και Φυσική Στοιχειωδών Σωματιδίων (ΒΑΣΙΚΗ ΦΥΣΙΚΗ)Library of the School of Science
Author:
Βασιλειάδης Γεώργιος
Supervisors info:
Χριστίνα Κουρκουμέλη Καθηγήτρια
Original Title:
Σταθερές βαθμονόμησης στο Barrel Calorimeter του ανιχνευτή του πειράματος GlueX και μελέτη της διασπάσεως των ω και η μεσονίων σε τρία πιόνια
Translated title:
Calibration constants in the Barrel Calorimeter of the GlueX detector and a study of the decay of the omega and eta mesons to three pions
Summary:
The GlueX experiment is an experiment at Jefferson Lab in Virginia, United
States of America. It aims to study the confinement of quarks and gluons in
hadrons.
Hybrid mesons and, in particular, exotic hybrid mesons, present the ideal
framework for studying Quantum Chromodynamics (QCD).
In this work we describe the procedure of extracting calibration constants in
the GlueX experiment as well as the first results from the study of the decay
of the omega and eta mesons to three pions.
In particular, we present the procedure we followed in order to extract the
effective speed of light inside the optical fibers of the Barrel Calorimeter,
which is a detector consisting of 48 modules 4m long made of alternating layers
of lead and optical fibers which are read at the two ends of the detector by
Silicon Photo-Multipliers (SIPMs). Moreover, we calculate the production ratio
of omega mesons to eta mesons in their common decay channel of three pions (two
charged pions and one neutral). We present a short study of the kinematic
parameters that could affect the production ratio. Finally, this ratio is
presented as a function of the photon beam energy.
Keywords:
GlueX, Detector, Experiment, Mesons, Calibration
