Jet-like correlations with neutral pion triggers in pp and central Pb–Pb collisions at 2.76 TeV

Adam, J.; Milošević, J.; Bíró, G.; Majka, R.; Weber, S. G.; Bregant, M.; Marchisone, M.; Vyvre, P. Vande; Graham, K. L.; Gasik, P.; Planinić, M.; Bartsch, E.; Girard, M. Fusco; Soramel, F.; Rachevski, A.; Alt, T.; Raniwala, R.; Qvigstad, H.; Meddi, F.; Schiaua, C.; Meethaleveedu, G. Koyithatta; Šándor, L.; Porter, R.; Zhang, Xiaoming; Kuhn, C.; Kouzinopoulos, C.; Paić, G.; Preghenella, R.; Christensen, Christian Holm; Ferreiro, E. G.; Dupieux, P.; Krzewicki, M.; Deplano, C.; Wilkinson, J.; Caliva, A.; Lupi, M.; Kim, Minwoo; Roeed, Ketil; Aphecetche, L.; Bartke, J.; Garg, P.; Oppedisano, C.; Münning, K.; Gotovac, S.; Stankus, P. W.; Ljunggren, H. M.; Valle, Z. Conesa del; Коваленко, В.; Sahoo, S.; Watanabe, Y.; Morales, Y. Corrales; Hellbär, E.; Cindolo, F.; Oleniacz, J.; Simatovic, G.; Петров, В. А.; Vilakazi, Z.; Bjelogrlic, S.; Vodopyanov, A.; Feuillard, Victor Jose Gaston; Nedosekin, A.; Petta, C.; Nicassio, M.; Budnikov, D.; Puddu, G.; Antonioli, P.; Villar, E. 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doi:10.1016/j.physletb.2016.10.048

Cited by 25 publications

(16 citation statements)

References 71 publications

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“…We can see that with the similarq 0 value, our model can provide a good description of experimental data on single and dihadron nuclear modification in both central and non-central Au+Au collisions at √ s NN = 0.2 TeV at RHIC. [35,40,41] and CMS [36,42] Collaborations. In each plot, different lines represent our model calculations for R AA and (or) I AA using differentq 0 values.…”

Section: Numerical Resultsmentioning

confidence: 99%

“…This paper follows closely the above efforts and study the nuclear modifications of both single hadron and dihadron productions at high transverse momenta using a next-to-leading-order (NLO) perturbative QCD model combined with the higher-twist energy loss formalism. In particular, we perform a global χ 2 analysis on the nuclear modification data on single hadron and dihadron productions at RHIC [31][32][33][34] and the LHC [35][36][37][38][39][40][41][42] and quantitatively extract the values of jet quenching parameterq. Our analysis yieldsq/T 3 = 4.1 ∼ 4.4 at T = 378 MeV at RHIC andq/T 3 = 2.6 ∼ 3.3 at T = 486 MeV at the LHC.…”

Section: Introductionmentioning

confidence: 99%

“…The single hadron and dihadron suppression factors in 0-10% Pb+Pb collisions at √ sNN = 2.76 TeV compared with CMS[36,42] and ALICE[35,40,41] data.…”

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confidence: 99%

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Extracting jet transport coefficient via single hadron and dihadron productions in high-energy heavy-ion collisions

et al. 2019

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Modifications of large transverse momentum single hadron, dihadron, and γ-hadron spectra in relativistic heavy-ion collisions are direct consequences of parton-medium interactions in the quarkgluon plasma (QGP). The interaction strength can be quantified by the jet transport coefficient q. We carry out the first global constraint on q using a next-to-leading order pQCD parton model with higher-twist parton energy loss and combining world experimental data on single hadron, dihadron, and γ-hadron suppression at both RHIC and LHC energies with a wide range of centralities. The global Bayesian analysis using the information field (IF) prior provides a stringent constraint on q(T ). We demonstrate in particular the progressive constraining power of the IF Bayesian analysis on the strong temperature dependence of q using data from different centralities and beam energies. We also discuss the advantage of using both inclusive and correlation observables with different geometric biases. As a verification, the obtained q(T ) is shown to describe data on single hadron anisotropy at high transverse momentum well. Predictions for future jet quenching measurements in oxygen-oxygen collisions are also provided.

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Section: Numerical Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Extracting jet transport coefficient via single hadron and dihadron productions in high-energy heavy-ion collisions

et al. 2019

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“…The yield in Pb-Pb collisions tends to increase at lower p T . Such an enhancement of associated charged hadrons at low p T has been observed in the π 0 − h and h − h correlations in Pb-Pb collisions [7,8]. In addition, a positive v 2 of e HF has been observed …”

Section: Heavy-flavour Production In Pb-pb Collisionsmentioning

confidence: 52%

Measurement of heavy-flavour production, correlations and jets with ALICE

Sakai

2018

EPJ Web Conf.

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“…π 0 -hadron correlations Two particle correlations between high-p T (8 < p T < 16 GeV/c) π 0 mesons and charged hadrons have been studied in the ALICE experiment in pp and central Pb-Pb collisions at √ s NN = 2.76 TeV [15]. There are two jet origin structures in the azimuthal correlation ∆ϕ = ϕ trig − ϕ assoc of the trigger particle and associated particles.…”

Section: Neutral Meson Measurementmentioning

confidence: 99%

Neutral pion and eta meson measurements with the ALICE detector

Matyja¹

2017

J. Phys.: Conf. Ser.

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Abstract. The ALICE experiment at the LHC is optimized to study the quark-gluon plasma (QGP), created in heavy-ion collisions. The medium-induced energy loss of particles can be investigated via the measurement of neutral meson spectra in heavy-ion collisions as well as via neutral meson-hadron correlations. Neutral mesons are identified from decay photon pairs via the invariant mass technique. Photons are measured in ALICE directly in the two electromagnetic calorimeters (PHOS and EMCal), as well as via the method of photon conversion (PCM) into electron-positon pairs, where the latter are measured in the inner tracking system (ITS) and the time projection chamber (TPC). Results obtained from EMCal, PHOS and PCM are consistent and allow measurements of spectra with high precision over a wide kinematical range. Suppression of the high-pT meson production is observed through the mesasurement of nuclear modification factor (RAA), which decreases with increasing the centrality of the collision. The suppression of the per-trigger yield on the away side in high-pT π 0 hadron correlations as measured by the modification factor (IAA) also shows evidence for parton energy loss in the medium. IntroductionNeutral π 0 and η mesons are produced via parton fragmentation in pp collisions. The meson production differential cross section is a convolution of parton distribution functions (PDF) in the proton, fragmentation functions (FF) of the parton into a meson, and the inclusive cross section of partons production. Studies of neutral meson production constrain both the PDF and FF. The dense environment created in heavy-ion collisions allows observation of modification of the PDF or FF via linear and non-linear recombination effects caused by the dense matter [1]. Insight into modification can be quantified with particle ratio comparisons between ultra-relativistic heavy-ion collisions and pp collisions. Light mesons are mostly produced in gluon fragmentation at LHC energies. Due to the different color factor, gluons will suffer a larger energy loss in the medium than quarks. Both this and a different relative contribution of gluons and quarks to neutral meson production may lead to differences in the suppression pattern of π 0 and η mesons [2,3]. High-p T meson production spectra give information about the energy loss of the scattered parton in the dense medium.Two-particle angular correlations between high-p T particles and associated particles are also used to study jet-quenching phenomena. They provide information about the amount and

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Jet-like correlations with neutral pion triggers in pp and central Pb–Pb collisions at 2.76 TeV

Cited by 25 publications

References 71 publications

Extracting jet transport coefficient via single hadron and dihadron productions in high-energy heavy-ion collisions

Extracting jet transport coefficient via single hadron and dihadron productions in high-energy heavy-ion collisions

Measurement of heavy-flavour production, correlations and jets with ALICE

Neutral pion and eta meson measurements with the ALICE detector

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