Measurement of transverse energy at midrapidity in Pb-Pb collisions at root s(NN)=2.76 TeV

Show full item record



Permalink

http://hdl.handle.net/10138/167899

Citation

Adam , J , Brucken , E J , Chang , B , Kim , D J , Mieskolainen , M M , Orava , R , Rak , J , Räsänen , S S & The ALICE Collaboration 2016 , ' Measurement of transverse energy at midrapidity in Pb-Pb collisions at root s(NN)=2.76 TeV ' Physical Review C , vol. 94 , no. 3 , 034903 . DOI: 10.1103/PhysRevC.94.034903

Title: Measurement of transverse energy at midrapidity in Pb-Pb collisions at root s(NN)=2.76 TeV
Author: Adam, J.; Adamova, D.; Aggarwal, M. M.; Rinella, G. Aglieri; Agnello, M.; Agrawal, N.; Ahammed, Z.; Ahmad, S.; Ahn, S. U.; Aiola, S.; Akindinov, A.; Alam, S. N.; Albuquerque, D. S. D.; Aleksandrov, D.; Alessandro, B.; Alexandre, D.; Molina, R. Alfaro; Alici, A.; Alkin, A.; Almaraz, J. R. M.; Alme, J.; Alt, T.; Altinpinar, S.; Altsybeev, I.; Alves Garcia Prado, C.; Andrei, C.; Andronic, A.; Anguelov, V.; Anticic, T.; Antinori, F.; Antonioli, P.; Aphecetche, L.; Appelshaeuser, H.; Arcelli, S.; Arnaldi, R.; Arnold, O. W.; Arsene, I. C.; Arslandok, M.; Audurier, B.; Augustinus, A.; Averbeck, R.; Azmi, M. D.; Badala, A.; Brucken, E. J.; Chang, B.; Kim, D. J.; Mieskolainen, M. M.; Orava, R.; Rak, J.; Räsänen, S. S.
Contributor: University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
Date: 2016-09-15
Language: eng
Number of pages: 19
Belongs to series: Physical Review C
ISSN: 2469-9985
URI: http://hdl.handle.net/10138/167899
Abstract: We report the transverse energy (ET) measured with ALICE at midrapidity in Pb-Pb collisions at root s(NN) = 2.76 TeV as a function of centrality. The transverse energy was measured using identified single-particle tracks. The measurement was cross checked using the electromagnetic calorimeters and the transverse momentum distributions of identified particles previously reported by ALICE. The results are compared to theoretical models as well as to results from other experiments. The mean ET per unit pseudorapidity (eta), <dE(T)/d eta >, in 0%-5% central collisions is 1737 +/- 6(stat.) +/- 97(sys.) GeV. We find a similar centrality dependence of the shape of <dE(T)/d eta > as a function of the number of participating nucleons to that seen at lower energies. The growth in <dE(T)/d eta > at the LHC energies exceeds extrapolations of low-energy data. We observe a nearly linear scaling of <dE(T)/d eta > with the number of quark participants. With the canonical assumption of a 1 fm/c formation time, we estimate that the energy density in 0%-5% central Pb-Pb collisions at root s(NN) = 2.76 TeV is 12.3 +/- 1.0 GeV/fm(3) and that the energy density at the most central 80 fm(2) of the collision is at least 21.5 +/- 1.7 GeV/fm(3). This is roughly 2.3 times that observed in 0%-5% central Au-Au collisions at root s(NN) = 200 GeV.
Subject: NUCLEUS-NUCLEUS COLLISIONS
QUARK-GLUON PLASMA
ELECTROMAGNETIC CALORIMETER
PP COLLISIONS
NEUTRAL PION
14.6A GEV/C
DISTRIBUTIONS
MULTIPLICITY
DEPENDENCE
MOMENTUM
114 Physical sciences
Rights:


Files in this item

Total number of downloads: Loading...

Files Size Format View
PhysRevC.94.034903.pdf 944.7Kb PDF View/Open

This item appears in the following Collection(s)

Show full item record