Jet-like correlations with neutral pion triggers in pp and central Pb–Pb collisions at 2.76 TeV
ALICE Collaboration. (2016). Jet-like correlations with neutral pion triggers in pp and central Pb–Pb collisions at 2.76 TeV. Physics Letters B, 763, 238-250. https://doi.org/10.1016/j.physletb.2016.10.048
Published in
Physics Letters BAuthors
Date
2016Copyright
©2016 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license. Funded by SCOAP3.
We present measurements of two-particle correlations with neutral pion trigger particles of transverse momenta 8 <ptrigT<16GeV/cand associated charged particles of 0.5 <passocT<10GeV/cversus the azimuthal angle difference ϕat midrapidity in pp and central Pb–Pb collisions at √sNN=2.76TeVwith ALICE. The new measurements exploit associated charged hadrons down to 0.5GeV/c, which significantly extends our previous measurement that only used charged hadrons above 3GeV/c. After subtracting the contributions of the flow background, v2to v5, the per-trigger yields are extracted for | ϕ| <0.7on the near and for | ϕ−π| <1.1on 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≈0.6for passocT>3GeV/c, while with decreasing momenta an enhancement develops reaching about 5at low passocT. On the near side, an enhancement of IAAbetween 1.2at the highest to 1.8at the lowest passocTis 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 passocT. Only AMPT captures the enhancement at low passocT, both on the near and away side. However, it also underpredicts IAAabove 5GeV/c, in particular on the near-side.
...
![showless](/themes/JYX2//images/showless.png)
![showmore](/themes/JYX2//images/showmore.png)
Publisher
Elsevier B.V.ISSN Search the Publication Forum
0370-2693Publication in research information system
https://converis.jyu.fi/converis/portal/detail/Publication/26334673
Metadata
Show full item recordCollections
License
Except where otherwise noted, this item's license is described as ©2016 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license. Funded by SCOAP3.
Related items
Showing items with similar title or keywords.
-
Measurement of charm and beauty production at central rapidity versus charged-particle multiplicity in proton-proton collisions at √s = 7 TeV
ALICE Collaboration (Springer Berlin Heidelberg, 2015)Prompt D meson and non-prompt J/ψ yields are studied as a function of the multiplicity of charged particles produced in inelastic proton-proton collisions at a centreof-mass energy of √ s = 7 TeV. The results are reported ... -
Forward-central two-particle correlations in p–Pb collisions at √sNN = 5.02 TeV
ALICE Collaboration (Elsevier B.V., 2016)Two-particle angular correlations between trigger particles in the forward pseudorapidity range (2.5 < |η| < 4.0) and associated particles in the central range (|η| < 1.0) are measured with the ALICE detector in p–Pb ... -
Pseudorapidity and transverse-momentum distributions of charged particles in proton–proton collisions at √s = 13 TeV
ALICE Collaboration (Elsevier B.V., 2016)The pseudorapidity (η) and transverse-momentum (pT) distributions of charged particles produced in proton–proton collisions are measured at the centre-of-mass energy √s = 13 TeV. The pseudorapidity distribution in |η| < ... -
Charged-particle multiplicities in proton–proton collisions at √s = 0.9 to 8 TeV
ALICE Collaboration (Springer Berlin Heidelberg, 2017)A detailed study of pseudorapidity densities and multiplicity distributions of primary charged particles produced in proton–proton collisions, at √s = 0.9, 2.36, 2.76, 7 and 8 TeV, in the pseudorapidity range |η| < 2, ... -
Charged-particle multiplicity distributions over a wide pseudorapidity range in proton-proton collisions at s√= 0.9, 7, and 8 TeV
ALICE Collaboration (Springer, 2017)We present the charged-particle multiplicity distributions over a wide pseudorapidity range (−3.4<η<5.0) for pp collisions at s√=0.9,7, and 8 TeV at the LHC. Results are based on information from the Silicon Pixel Detector ...