The transverse momentum (p<inf>T</inf>) spectrum and nuclear modification factor (R<inf>AA</inf>) of reconstructed jets in 0-10% and 10-30% central Pb-Pb collisions at sNN=2.76 TeV were measured. Jets were reconstructed using the anti-k<inf>T</inf> jet algorithm with a resolution parameter of R=0.2 from charged and neutral particles, utilizing the ALICE tracking detectors and Electromagnetic Calorimeter (EMCal). The jet p<inf>T</inf> spectra are reported in the pseudorapidity interval of |η<inf>jet</inf>|<0.5 for 40<p<inf>T,jet</inf><120 GeV/c in 0-10% and for 30<p<inf>T,jet</inf><100 GeV/c in 10-30% collisions. Reconstructed jets were required to contain a leading charged particle with p<inf>T</inf>>5 GeV/c to suppress jets constructed from the combinatorial background in Pb-Pb collisions. The leading charged particle requirement applied to jet spectra both in pp and Pb-Pb collisions had a negligible effect on the R<inf>AA</inf>. The nuclear modification factor R<inf>AA</inf> was found to be 0.28±0.04 in 0-10% and 0.35±0.04 in 10-30% collisions, independent of p<inf>T,jet</inf> within the uncertainties of the measurement. The observed suppression is in fair agreement with expectations from two model calculations with different approaches to jet quenching. © 2015.

Measurement of jet suppression in central Pb-Pb collisions at √sNN=2.76 TeV / Adamová, D., Aggarwal, M.M., Rinella, A.G., Agnello, M., Agrawal, N., Ahammed, Z., Ahmed, I., Ahn, S.U., Aimo, I., Aiola, S., Ajaz, M., Akindinov, A., Alam, S.N., Aleksandrov, D., Alessandro, B., Alexandre, D., Molina, R.A., Alici, A., Alkin, A., Alme, J., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 746:(2015), pp. 1-14. [10.1016/j.physletb.2015.04.039]

Measurement of jet suppression in central Pb-Pb collisions at √sNN=2.76 TeV

BRUNO, Giuseppe Eugenio;
2015

Abstract

The transverse momentum (pT) spectrum and nuclear modification factor (RAA) of reconstructed jets in 0-10% and 10-30% central Pb-Pb collisions at sNN=2.76 TeV were measured. Jets were reconstructed using the anti-kT jet algorithm with a resolution parameter of R=0.2 from charged and neutral particles, utilizing the ALICE tracking detectors and Electromagnetic Calorimeter (EMCal). The jet pT spectra are reported in the pseudorapidity interval of |ηjet|<0.5 for 40T,jet<120 GeV/c in 0-10% and for 30T,jet<100 GeV/c in 10-30% collisions. Reconstructed jets were required to contain a leading charged particle with pT>5 GeV/c to suppress jets constructed from the combinatorial background in Pb-Pb collisions. The leading charged particle requirement applied to jet spectra both in pp and Pb-Pb collisions had a negligible effect on the RAA. The nuclear modification factor RAA was found to be 0.28±0.04 in 0-10% and 0.35±0.04 in 10-30% collisions, independent of pT,jet within the uncertainties of the measurement. The observed suppression is in fair agreement with expectations from two model calculations with different approaches to jet quenching. © 2015.
2015
http://www.sciencedirect.com/science/article/pii/S0370269315002828
Measurement of jet suppression in central Pb-Pb collisions at √sNN=2.76 TeV / Adamová, D., Aggarwal, M.M., Rinella, A.G., Agnello, M., Agrawal, N., Ahammed, Z., Ahmed, I., Ahn, S.U., Aimo, I., Aiola, S., Ajaz, M., Akindinov, A., Alam, S.N., Aleksandrov, D., Alessandro, B., Alexandre, D., Molina, R.A., Alici, A., Alkin, A., Alme, J., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 746:(2015), pp. 1-14. [10.1016/j.physletb.2015.04.039]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/80387
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