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dc.contributor.authorAdam, Jaroslav
dc.contributor.authorAdamová, Dagmar
dc.contributor.authorAggarwal, Madan M.
dc.contributor.authorAglieri Rinella, Gianluca
dc.contributor.authorAgnello, Michelangelo
dc.contributor.authorAgrawal, Nikita
dc.contributor.authorAhammed, Zubayer
dc.contributor.authorAhmad, Shafiq F.
dc.contributor.authorAhn, Sang Un
dc.contributor.authorAiola, Salvatore
dc.contributor.authorAlme, Johan
dc.contributor.authorHelstrup, Håvard
dc.contributor.authorHetland, Kristin Fanebust
dc.contributor.authorKileng, Bjarte
dc.contributor.authorAltinpinar, Sedat
dc.contributor.authorDjuvsland, Øystein
dc.contributor.authorLønne, Per-Ivar
dc.contributor.authorNystrand, Joakim
dc.contributor.authorRehman, Attiq ur
dc.contributor.authorRøhrich, Dieter
dc.contributor.authorTambave, Ganesh Jagannath
dc.contributor.authorUllaland, Kjetil
dc.contributor.authorVelure, Arild
dc.contributor.authorWagner, Boris
dc.contributor.authorZhang, Hui
dc.contributor.authorZhou, Zhuo
dc.contributor.authorZhu, Hongsheng
dc.contributor.authorArsene, Ionut Christian
dc.contributor.authorBätzing, Paul Christoph
dc.contributor.authorDordic, Olja
dc.contributor.authorLindal, Svein
dc.contributor.authorMahmood, Sohail Musa
dc.contributor.authorMilosevic, Jovan
dc.contributor.authorQvigstad, Henrik
dc.contributor.authorRichter, Matthias
dc.contributor.authorRøed, Ketil
dc.contributor.authorSkaali, Toralf Bernhard
dc.contributor.authorTveter, Trine Spedstad
dc.contributor.authorWikne, Jon Christopher
dc.contributor.authorZhao, Chengxin
dc.contributor.authorLangøy, Rune
dc.contributor.authorLien, Jørgen André
dc.contributor.authorAkindinov, Alexander
dc.contributor.authorAlam, Sk Noor
dc.contributor.authorDe Albuquerque, Danilo Silva
dc.contributor.authorAleksandrov, Dimitry
dc.contributor.authorAlessandro, Bruno
dc.contributor.authorAlexandre, Didier
dc.contributor.authorAlfaro Molina, José Rubén
dc.contributor.authorAlici, Andrea
dc.contributor.authorALICE, Collaboration
dc.PublishedAdam J, Adamová D, Aggarwal MM, Aglieri Rinella G, Agnello M, Agrawal N, Ahammed Z, Ahmad SF, Ahn SU, Aiola S, Alme J, Helstrup H, Hetland KF, Kileng B, Altinpinar S, Djuvsland Ø, Lønne P, Nystrand J, Rehman Au, Røhrich D, Tambave GJ, Ullaland K, Velure A, Wagner B, Zhang H, Zhou Z, Zhu H, Arsene IC, Bätzing P, Dordic O, Lindal S, Mahmood SM, Milosevic J, Qvigstad H, Richter M, Røed K, Skaali TB, Tveter TS, Wikne JC, Zhao C, Langøy R, Lien JA, Akindinov A, Alam SN, De Albuquerque DS, Aleksandrov D, Alessandro B, Alexandre D, Alfaro Molina JR, Alici A, ALICE C. Jet-like correlations with neutral pion triggers in pp and central Pb–Pb collisions at 2.76 TeV. Physics Letters B. 2016;763:238-250eng
dc.description.abstractWe present measurements of two-particle correlations with neutral pion trigger particles of transverse momenta \(8 < p_{\mathrm{T}}^{\rm trig} < 16 \mathrm{GeV}/c\) and associated charged particles of \(0.5 < p_{\mathrm{T}}^{\rm assoc} < 10 \mathrm{GeV}/c\) versus the azimuthal angle difference \(\Delta\varphi\) at midrapidity in pp and central Pb-Pb collisions at \(\sqrt{s_{\mathrm{NN}}}=2.76\) TeV with ALICE. The new measurements exploit associated charged hadrons down to \(0.5 \mathrm{GeV}/c\), which significantly extends our previous measurement that only used charged hadrons above \(3 \mathrm{GeV}/c\), After subtracting the contributions of the flow background, \(v_2\) to \(v_5\), the per-trigger yields are extracted for \(|\Delta\varphi|<0.7\) on the near and for \(|\Delta\varphi-\pi| < 1.1\) on the away side. The ratio of per-trigger yields in Pb--Pb to those in pp collisions, \(I_{\mathrm{AA}}\), 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 \(I_{\mathrm{AA}} \approx 0.6\) for \(p_{\mathrm{T}}^{\rm assoc} > 3 \mathrm{GeV}/c\), while with decreasing momenta an enhancement develops reaching about \(5\) at low \(p_{\mathrm{T}}^{\rm assoc}\), On the near side, an enhancement of \(I_{\mathrm{AA}}\) between \(1.2\) at the highest to \(1.8\) at the lowest \(p_{\mathrm{T}}^{\rm assoc}\) 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 \(p_{\mathrm{T}}^{\rm assoc}\), Only AMPT captures the enhancement at low \(p_{\mathrm{T}}^{\rm assoc}\), both on the near and away side. However, it also underpredicts \(I_{\mathrm{AA}}\) above \(5\) GeV/\(c\), in particular on the near-side.en_US
dc.rightsAttribution CC BYeng
dc.titleJet-like correlations with neutral pion triggers in pp and central Pb–Pb collisions at 2.76 TeVen_US
dc.typePeer reviewed
dc.typeJournal article
dc.rights.holderCopyright 2016 The Author(s)en_US
dc.source.journalPhysics Letters B
dc.relation.projectNorges forskningsråd: 255188
dc.subject.nsiVDP::Matematikk og naturvitenskap: 400::Fysikk: 430::Kjerne- og elementærpartikkelfysikk: 431
dc.subject.nsiVDP::Mathematics and natural scienses: 400::Physics: 430::Nuclear and elementary particle physics: 431

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