eprintid: 26115
rev_number: 14
eprint_status: archive
userid: 4289
dir: disk0/00/02/61/15
datestamp: 2019-02-28 16:19:47
lastmod: 2019-03-06 08:19:33
status_changed: 2019-02-28 16:19:47
type: doctoralThesis
metadata_visibility: show
creators_name: Weiser, Dennis
title: Inclusive J/ψ production at mid-rapidity in pp and
Pb–Pb collisions with ALICE
subjects: ddc-530
divisions: i-130200
adv_faculty: af-13
keywords: Heavy-Ion collisions, J/Psi production
abstract: The measurement of J/ψ production in heavy-ion collisions is seen as a key
measurement in the hunt for the Quark-Gluon Plasma. At high collision energies
as reached at the LHC it was predicted that a significant fraction of the J/ψ
yield is formed by (re)combination of deconfined charm and anticharm quarks in
the medium or at the phase boundary. This mechanism is expected to be most
important at very low transverse momentum.
In this thesis the production of J/ψ mesons is studied at mid-rapidity (|y| < 0.9) in pp and Pb–Pb collisions at a collision energy of √s_NN = 5.02 TeV with ALICE.
The J/ψ mesons are reconstructed in the e+e− decay channel down to vanishing
transverse momentum (pT = 0). The electrons and positrons are identified using
the specific energy loss dE/dx in the TPC. The J/ψ spectrum and the nuclear
modification factor R_AA in most central collisions are consistent with models
which include (re)combination as a dominant source of J/ψ production. The
measurement of the first two moments of the pT distribution as a function of
centrality shows that this mechanism becomes more important for more central
collisions.
date: 2019
id_scheme: DOI
id_number: 10.11588/heidok.00026115
ppn_swb: 165577851X
own_urn: urn:nbn:de:bsz:16-heidok-261159
date_accepted: 2019-02-07
advisor: HASH(0x55e0f7f436d8)
language: eng
bibsort: WEISERDENNINCLUSIVEJ2019
full_text_status: public
place_of_pub: Heidelberg
citation:   Weiser, Dennis  (2019) Inclusive J/ψ production at mid-rapidity in pp and Pb–Pb collisions with ALICE.  [Dissertation]     
document_url: https://archiv.ub.uni-heidelberg.de/volltextserver/26115/1/Dissertation_Dennis_Weiser.pdf