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@ARTICLE{Adam:200851,
author = {Adam, Jaroslav and others},
collaboration = {{ALICE Collaboration}},
title = {{J}et-like correlations with neutral pion triggers in pp
and central {P}b–{P}b collisions at 2.76 {T}e{V}},
journal = {Physics letters / B},
volume = {B763},
issn = {0370-2693},
address = {Amsterdam},
publisher = {North-Holland Publ.},
reportid = {GSI-2017-00185},
pages = {238 - 250},
year = {2016},
note = {"Published by Elsevier B.V. This is an open access article
under the CC BY license
(http://creativecommons.org/licenses/by/4.0/). Funded by
SCOAP3."},
abstract = {We present measurements of two-particle correlations with
neutral pion trigger particles of transverse momenta
8<pTtrig<16 GeV/c and associated charged particles of
0.5<pTassoc<10 GeV/c versus the azimuthal angle difference
Δ φ at midrapidity in pp and central Pb–Pb collisions at
sNN=2.76 TeV with ALICE. The new measurements exploit
associated charged hadrons down to 0.5 GeV/c , which
significantly extends our previous measurement that only
used charged hadrons above 3 GeV/c . After subtracting the
contributions of the flow background, v2 to v5 , the
per-trigger yields are extracted for |Δφ|<0.7 on the near
and for |Δφ−π|<1.1 on the away side. The ratio of
per-trigger yields in Pb–Pb to those in pp collisions, IAA
, is measured on the near and away side for the $0–10\%$
most central Pb–Pb collisions. On the away side, the
per-trigger yields in Pb–Pb are strongly suppressed to the
level of IAA≈0.6 for pTassoc>3 GeV/c , while with
decreasing momenta an enhancement develops reaching about 5
at low pTassoc . On the near side, an enhancement of IAA
between 1.2 at the highest to 1.8 at the lowest pTassoc is
observed. The data are compared to parton-energy-loss
predictions of the JEWEL and AMPT event generators, as well
as to a perturbative QCD calculation with medium-modified
fragmentation functions. All calculations qualitatively
describe the away-side suppression at high pTassoc . Only
AMPT captures the enhancement at low pTassoc , both on the
near and away side. However, it also underpredicts IAA above
5 GeV/c , in particular on the near-side.},
keywords = {pi: trigger (autogen) / heavy ion: scattering (autogen) /
correlation: two-particle (autogen) / quantum
chromodynamics: perturbation theory (autogen) / p p:
scattering (autogen) / enhancement (autogen) / suppression
(autogen) / hadron (autogen) / fragmentation function
(autogen) / transverse momentum (autogen) / charged particle
(autogen) / Monte Carlo (autogen) / background (autogen) /
capture (autogen) / ALICE (autogen) / flow (autogen)},
cin = {ALI / DTL / CIT},
ddc = {530},
cid = {I:(DE-Ds200)ALI-20080822OR105 /
I:(DE-Ds200)DTL-20051214OR031 /
I:(DE-Ds200)CIT-20110310OR121},
pnm = {612 - Cosmic Matter in the Laboratory (POF3-612) / EMMI -
Helmholtz-Allianz 'Kosmische Materie im Labor', Extreme
Matter Institute (HGF-IVF-HA-216) / HGF-IVF-VH-GS-201 -
HGS-HIRe : (HGF-IVF-VH-GS-201) / SUC-GSI-Heidelberg -
Strategic university cooperation GSI-U Heidelberg
(SUC-GSI-HE) / SUC-GSI-Frankfurt - Strategic university
cooperation GSI-U Frankfurt/M (SUC-GSI-FR) /
SUC-GSI-Darmstadt - Strategic university cooperation GSI-TU
Darmstadt (SUC-GSI-DA) / OAGSI - Open Access Publikation mit
Unterstützung des GSI Helmholtzzentrums für
Schwerionenforschung (OAGSI)},
pid = {G:(DE-HGF)POF3-612 / G:(DE-Ds200)HGF-IVF-HA-216 /
G:(DE-Ds200)HGF-IVF-VH-GS-201 / G:(DE-Ds200)SUC-GSI-HE /
G:(DE-Ds200)SUC-GSI-FR / G:(DE-Ds200)SUC-GSI-DA /
G:(DE-Ds200)OAGSI},
typ = {PUB:(DE-HGF)16},
eprint = {1608.07201},
howpublished = {arXiv:1608.07201},
archivePrefix = {arXiv},
SLACcitation = {$\%\%CITATION$ = $arXiv:1608.07201;\%\%$},
UT = {WOS:000390126600037},
doi = {10.1016/j.physletb.2016.10.048},
url = {https://repository.gsi.de/record/200851},
}