Particle-yield modification in jet-like azimuthal di-hadron correlations in Pb-Pb collisions at $\sqrt{s_{NN}} = 2.76$ TeV - INSPIRE

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Particle-yield modification in jet-like azimuthal di-hadron correlations in Pb-Pb collisions at $\sqrt{s_{NN}} = 2.76$ TeV

ALICE

Collaboration

Oct, 2011

15 pages

Published in:

Phys.Rev.Lett. 108 (2012) 092301

e-Print:

1110.0121 [nucl-ex]

DOI:

10.1103/PhysRevLett.108.092301

Report number:

CERN-PH-EP-2011-161

Experiments:

CERN-LHC-ALICE

View in:

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reference search188 citations

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Abstract: (arXiv)

The yield of charged particles associated with high-

p_{\rm T}

trigger particles (

8 < p_{\rm T} < 15

GeV/

c

) is measured with the ALICE detector in Pb-Pb collisions at

\sqrt{s_{\rm NN}}

= 2.76 TeV relative to proton-proton collisions at the same energy. The conditional per-trigger yields are extracted from the narrow jet-like correlation peaks in azimuthal di-hadron correlations. In the 5% most central collisions, we observe that the yield of associated charged particles with transverse momenta

p_{\rm T}> 3

GeV/

c

on the away-side drops to about 60% of that observed in pp collisions, while on the near-side a moderate enhancement of 20-30% is found.

Note:

15 pages, 2 captioned figures, 1 table, authors from page 10, published version, figures at http://aliceinfo.cern.ch/ArtSubmission/node/3506

dihadron: angular correlation
charged particle: yield
heavy ion: scattering
lead
transverse momentum
impact parameter: dependence
ALICE
nuclear matter: effect
p p: interaction
jet

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