The transverse momentum (pT) spectrum and nuclear modification factor (R_AA) 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 |η_jet|<0.5 for 40<120 GeV/c in 0-10% and for 30<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 R_AA. The nuclear modification factor R_AA was found to be 0.28±0.04 in 0-10% and 0.35±0.04 in 10-30% collisions, independent of p_(T,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.

Adam, J., Adamová, D., Aggarwal, M.M., Rinella, G.A., Agnello, M., Agrawal, N., et al. (2015). Measurement of jet suppression in central Pb–Pb collisions at √sNN=2.76 TeV. PHYSICS LETTERS. SECTION B, 746, 1-14 [10.1016/j.physletb.2015.04.039].

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

Alici, A.;ARCELLI, SILVIA;BASILE, MAURIZIO;BELLINI, FRANCESCA;CIFARELLI, LUISA;COLOCCI, MANUEL;GUERZONI, BARBARA;SCIOLI, GILDA;
2015

Abstract

The transverse momentum (pT) spectrum and nuclear modification factor (R_AA) 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 |η_jet|<0.5 for 40<120 GeV/c in 0-10% and for 30<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 R_AA. The nuclear modification factor R_AA was found to be 0.28±0.04 in 0-10% and 0.35±0.04 in 10-30% collisions, independent of p_(T,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
Adam, J., Adamová, D., Aggarwal, M.M., Rinella, G.A., Agnello, M., Agrawal, N., et al. (2015). Measurement of jet suppression in central Pb–Pb collisions at √sNN=2.76 TeV. PHYSICS LETTERS. SECTION B, 746, 1-14 [10.1016/j.physletb.2015.04.039].
Adam, J.; Adamová, D.; Aggarwal, M.M.; Rinella, G. Aglieri; Agnello, M.; Agrawal, N.; Ahammed, Z.; Ahmed, I.; Ahn, S.U.; Aimo, I.; Aiola, S.; Ajaz, M....espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/541707
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