CERN Accelerating science

Thesis
Report number	CERN-THESIS-2014-373
Title	Study of the angular correlation between heavy-flavour decay electrons and charged unidentified particles in pp and p-Pb collisions with ALICE
Related title	Título em português Estudo da correlação angular entre elétrons oriundos de quarks pesados e partículas carregadas em colisões pp e p-Pb com o detector ALICE
Author(s)	Pereira De Oliveira Filho, Elienos (Sao Paulo U.)
Publication	201.
Thesis note	PhD : Sao Paulo U. : 2014
Thesis supervisor(s)	Alarcon do Passo Suaide, Alexandre
Note	presented 05 Dec 2014
Subject category	Particle Physics - Experiment ; Nuclear Physics - Experiment
Accelerator/Facility, Experiment	CERN LHC ; ALICE
Abstract	The aim of relativistic heavy-ion collisions is to investigate the properties of the Quark-Gluon Plasma (QGP) phase, that is achieved at high-enough temperatures and/or densities. In this context, light on heavy-ion collisions (e. g. p-Pb) are used to assess Cold Nuclear Matter effects (CNM), while elementary hadronic collisions (e. g. proton-proton) provide tests for QCD (Quantum Chromodynamics) based calculations and baseline for studies with heavy- ions. Heavy quarks, i. e. charm and beauty, are very convenient in the characterization of the QGP. They are produced via initial hard parton-parton scatterings at the early stages of the collision and, therefore, they are a self-generated probe for the system created in the reaction. In this work the angular correlation between electrons from heavy-flavour hadron decays and charged particles was studied in pp (2.76 and 7 TeV) and p-Pb (5.02 TeV) collisions at the CERN Large Hadron Collider, using the ALICE detector. The correlation strengths were evaluated as a function of multiplicity in p-Pb collisions. In pp collisions the relative beauty (and charm) contribution to the total heavy-flavour decay electron yield was estimated using the measured correlation distribution and Monte Carlo templates.

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