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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Vydáno v:	Physics Letters B Ročník 719; číslo 4-5; s. 220 - 241
Hlavní autoři:	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.
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	United States Elsevier B.V 26.02.2013 Elsevier BV Elsevier
Témata:	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
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Popis
Shrnutí:	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.
Bibliografie:	USDOE Office of Science (SC) AC02-76SF00515 SLAC-PUB-15504
ISSN:	0370-2693 1873-2445
DOI:	10.1016/j.physletb.2013.01.024