Reprodukcija i izučavanje fenomena grebena (''ridge'') u korelacijama dviju čestica na ALICE detektoru

master's thesis

• Title (english): The reproduction and study of the ridge phenomenon in two-particle correlations with the ALICE detector
• Author: Marko Jerčić
• Mentor: Nikola Poljak (mentor)
• Committee member: Nikola Poljak (predsjednik povjerenstva)
• Committee member: Davor Horvatić (član povjerenstva)
• Committee member: Mihael Makek (član povjerenstva)
• Committee member: Mirko Planinić (član povjerenstva)
• Committee member: Krešimir Kumerički (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Physics); Zagreb
• Defense date and country: 2016-07-21, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract

Korelacije dviju čestica pokazale su se kao koristan alat za analizu mehanizama proizvodnje čestica te kolektivnih ponašanja u visokoenergetskim sudarima. Prijašnja mjerenja ukazala su na pojavu zanimljivih grebenastih struktura u korelacijskim funkcijama koje bi mogle biti indikator za pojavu kvarkovsko-gluonske plazme. U diplomskom radu analizirane su dvočestične korelacije na proton-proton sudarima opaženima ALICE detektorom. Analiza je učinjena na način da se koristeći transverzalni sfericitet uvedu rezovi na oblik događaja kako bi se uklonila pozadina tvrdih mlazolikih događaja. Cilj istraživanja proučavanje je načina na koji transverzalni sfericitet utječe na korelacijske funkcije i strukture koje se u njima pojavljuju. Mjerenja su reproducirala poznate strukture, međutim opažena je i pojava novih struktura na visoko sferičnim dogadajima.

Abstract (english)

Two particle correlations have been shown to be a useful tool for analysing particle production mechanisms and collective behaviours in high energy collisions. Past measurements have indicated the presence of an interesting ”ridge-like” structure in these correlation functions which could be an indicator of the formation of quark-gluon plasma. In this thesis, two-particle correlations in proton-proton collisions measured by the ALICE detector will be analysed. The analysis have been done by using cuts on transverse sphericity, which is an event shape variable, to remove the background from jet-like events. The goal of the thesis is to study the way that transverse sphericity affects the correlation function and its structures. Measurements have reproduced known structures, however some new structures have emerged in high sphericity events.

• Keywords: proton-proton sudari; ALICE detektor
• Keywords (english): proton-proton collisions; ALICE detector
• Language: croatian
• URN:NBN: urn:nbn:hr:217:620660
• Study programme: Title: Physics; specializations in: Research; Course: Research; Study programme type: university; Study level: integrated undergraduate and graduate; Academic / professional title: magistar/magistra fizike (magistar/magistra fizike)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2017-03-03 22:12:54