Measurement of the jet radius and transverse momentum dependence of inclusive jet suppression in lead–lead collisions at sNN=2.76 TeV with the ATLAS detector

Measurements of inclusive jet suppression in heavy ion collisions at the LHC provide direct sensitivity to the physics of jet quenching. In a sample of lead–lead collisions at sNN=2.76 TeV corresponding to an integrated luminosity of approximately 7 μb−1, ATLAS has measured jets with a calorimeter s...

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Published in:Physics Letters B Vol. 719; no. 4-5; pp. 220 - 241
Main Authors: Aad, G., Abbott, B., Aleksa, M., Alon, R., Aoun, S., Bai, Y., Baker, O.K., Bartsch, V., Becker, A.K., Bell, W.H., Beloborodova, O., Bernat, P., Bertin, A., Bindi, M., Binet, S., Bitenc, U., Borisov, A., Brandt, A., Brau, B., Bruni, G., Calkins, R., Casado, M.P., Chitan, A., Christidi, I.A., Christov, A., Constantinescu, S., Cuciuc, C.-M., Dawe, E., De Sanctis, U., Dietzsch, T.A., Duchovni, E., Eigen, G., Flores Castillo, L.R., Francavilla, P., Frost, J.A., Gagliardi, G., Gardner, R.W., Giorgi, F.M., Goddard, J.R., Gössling, C., Graziani, E., Grillo, A.A., Haller, J., Hare, G.A., Hellman, S., Hernández Jiménez, Y., Hrynʼova, T., Joergensen, M.D., Johnert, S., Kekelidze, G.D., Köneke, K., Komar, A.A., Kondo, T., Kuze, M., Lavrijsen, W., Le Guirriec, E., Ledroit-Guillon, F., Lee, S.C., Leitner, R., Litke, A.M., Losty, M.J., Mahboubi, K., Martin, J.P., Martyniuk, A.C., Merritt, H., Moa, T., Mussche, I., Myska, M., Orr, R.S., Papadopoulou, Th.D., Petersen, T.C., Petteni, M., Poll, J., Riu, I., Rizvi, E., Roe, S., Rossetti, V., Safai Tehrani, F., Schaetzel, S., Shan, L.Y., Steele, G., Sykora, T., Takashima, R., Tasevsky, M., Toggerson, B., Toms, K., Tremblet, L., Undrus, A., Varvell, K.E., Vazquez Schroeder, T., von Radziewski, H., Wahlen, H., Waugh, B.M., Weber, M.S., White, S., Wielers, M., Yamanaka, T., Yurkewicz, A., Zaytsev, A., Zhang, H.
Format: Journal Article
Language:English
Published: United States Elsevier B.V 26.02.2013
Elsevier BV
Elsevier
Subjects:
ATLAS; heavy ion; Jets; LHC
Experiment-HEP
Experiment-Nucl
Heavy ion
HEPEX
info:eu-repo/classification/ddc/530
INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
Jets
jets; lhc; heavy ion; atlas
LHC
Settore FIS/01 - FISICA SPERIMENTALE
ATLAS
Heavy ion
Jets
LHC
ISSN:0370-2693, 1873-2445
Online Access:Get full text
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Summary:Measurements of inclusive jet suppression in heavy ion collisions at the LHC provide direct sensitivity to the physics of jet quenching. In a sample of lead–lead collisions at sNN=2.76 TeV corresponding to an integrated luminosity of approximately 7 μb−1, ATLAS has measured jets with a calorimeter system over the pseudorapidity interval |η|<2.1 and over the transverse momentum range 38<pT<210 GeV. Jets were reconstructed using the anti-kt algorithm with values for the distance parameter that determines the nominal jet radius of R=0.2, 0.3, 0.4 and 0.5. The centrality dependence of the jet yield is characterized by the jet “central-to-peripheral ratio,” RCP. Jet production is found to be suppressed by approximately a factor of two in the 10% most central collisions relative to peripheral collisions. RCP varies smoothly with centrality as characterized by the number of participating nucleons. The observed suppression is only weakly dependent on jet radius and transverse momentum. These results provide the first direct measurement of inclusive jet suppression in heavy ion collisions and complement previous measurements of dijet transverse energy imbalance at the LHC.
Bibliography:USDOE Office of Science (SC)
AC02-76SF00515
SLAC-PUB-15504
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2013.01.024