Net-Charge Fluctuations in Pb-Pb collisions at \sqrt(s)_NN = 2.76 TeV

Net-Charge Fluctuations in Pb-Pb collisions at \sqrt(s)_NN = 2.76 TeV

We report the first measurement of the net-charge fluctuations in Pb-Pb collisions at \surd s_NN 2.76 TeV, measured with the ALICE detector at the CERN Large Hadron Collider. The dynamical fluctuations per unit entropy are observed to decrease when going from peripheral to central collisions. An add...

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Veröffentlicht in:Physical review letters 2013, Vol.110
Hauptverfasser: Abelev, B., Arbor, N., Conesa Balbastre, G., Faivre, J., Furget, C., Guernane, R., Kox, S., Real, J.S., Silvestre, C., Vernet, R., Belikov, I., Hippolyte, B., Kuhn, C., Roy, C., Sanchez Castro, X., Senyukov, S., Aphecetche, Laurent, Batigne, Guillaume, Bergognon, E., Bregant, M., Delagrange, H., Driga, O., Erazmus, B., Estienne, Magali, Germain, Marie, Lardeux, A., Lefèvre, F., Luquin, L., Martinez Garcia, Gines, Mas, A., Massacrier, L., Matyja, A., Pillot, Philippe, Schutz, Y., Shabetai, Alexandre, Stocco, Diego, Cheshkov, C., Cheynis, B., Ducroux, L., Grossiord, J.-Y., Guilbaud, Maxime, Tieulent, R., Uras, A., Zoccarato, Y., Baek, Y.W., Baldit, A., Barret, V., Bastid, N., Crochet, P., Dupieux, P., Ichou, R., Lopez, X., Manso, F., Marchisone, M., Porteboeuf-Houssais, S., Rosnet, P., Vulpescu, B., Zhang, X.
Format: Artikel
Sprache:eng
Schlagworte:
High Energy Physics - Experiment
High Energy Physics - Phenomenology
Nuclear Experiment
Nuclear Theory
Physics
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Zusammenfassung:We report the first measurement of the net-charge fluctuations in Pb-Pb collisions at \surd s_NN 2.76 TeV, measured with the ALICE detector at the CERN Large Hadron Collider. The dynamical fluctuations per unit entropy are observed to decrease when going from peripheral to central collisions. An additional reduction in the amount of fluctuations is seen in comparison to the results from lower energies. We examine the dependence of fluctuations on the pseudo-rapidity interval, which may account for the dilution of fluctuations during the evolution of the system. We find that the ALICE data points are between the theoretically predicted values for a hadron gas and a Quark-Gluon Plasma.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.110.152301