TY - JOUR
T1 - Measurement of jet pT correlations in Pb + Pb and pp collisions at sNN=2.76 TeVwith the ATLAS detector
AU - The ATLAS Collaboration
AU - Aaboud, M.
AU - Aad, G.
AU - Abbott, B.
AU - Abdallah, J.
AU - Abdinov, O.
AU - Abeloos, B.
AU - Abidi, S. H.
AU - AbouZeid, O. S.
AU - Abraham, N. L.
AU - Abramowicz, H.
AU - Abreu, H.
AU - Abreu, R.
AU - Abulaiti, Y.
AU - Acharya, B. S.
AU - Adachi, S.
AU - Adamczyk, L.
AU - Adams, D. L.
AU - Adelman, J.
AU - Adersberger, M.
AU - Adye, T.
AU - Affolder, A. A.
AU - Agatonovic-Jovin, T.
AU - Agheorghiesei, C.
AU - Aguilar-Saavedra, J. A.
AU - Ahlen, S. P.
AU - Ahmadov, F.
AU - Aielli, G.
AU - Akatsuka, S.
AU - Akerstedt, H.
AU - Åkesson, T. P.A.
AU - Akimov, A. V.
AU - Alberghi, G. L.
AU - Albert, J.
AU - Alconada Verzini, M. J.
AU - Aleksa, M.
AU - Aleksandrov, I. N.
AU - Alexa, C.
AU - Alexander, G.
AU - Alexopoulos, T.
AU - Ali, B.
AU - Aliev, M.
AU - Alimonti, G.
AU - Alison, J.
AU - Allbrooke, B. M.M.
AU - Allen, B. W.
AU - Aloisio, A.
AU - Alonso, A.
AU - Hooberman, B. H.
AU - Neubauer, M. S.
AU - Sickles, A. M.
N1 - Funding Information:
We acknowledge the support of ANPCyT , Argentina; YerPhI, Armenia; ARC , Australia; BMWFW and FWF , Austria; ANAS , Azerbaijan; SSTC , Belarus; CNPq and FAPESP , Brazil; NSERC , NRC and CFI , Canada; CERN ; CONICYT , Chile; CAS , MOST and NSFC , China; COLCIENCIAS , Colombia; MSMT CR , MPO CR and VSC CR , Czech Republic; DNRF and DNSRC , Denmark; IN2P3-CNRS , CEA-DSM/IRFU , France; SRNSF , Georgia; BMBF , HGF , and MPG , Germany; GSRT , Greece; RGC , Hong Kong SAR , China; ISF , I-CORE and Benoziyo Center , Israel; INFN , Italy; MEXT and JSPS , Japan; CNRST , Morocco; NWO , Netherlands; RCN , Norway; MNiSW and NCN , Poland; FCT , Portugal; MNE/IFA , Romania; MES of Russia and NRC KI , Russian Federation; JINR ; MESTD , Serbia; MSSR , Slovakia; ARRS and MIZŠ , Slovenia; DST/NRF , South Africa; MINECO , Spain; SRC and Wallenberg Foundation , Sweden; SERI , SNSF and Cantons of Bern and Geneva , Switzerland; MOST , Taiwan; TAEK , Turkey; STFC , United Kingdom; DOE and NSF , United States of America. In addition, individual groups and members have received support from BCKDF , the Canada Council , Canarie , CRC , Compute Canada , FQRNT , and the Ontario Innovation Trust , Canada; EPLANET , ERC , ERDF , FP7 , Horizon 2020 and Marie Skłodowska-Curie Actions , European Union; Investissements d'Avenir Labex and Idex , ANR , Région Auvergne and Fondation Partager le Savoir , France; DFG and AvH Foundation , Germany; Herakleitos, Thales and Aristeia programmes co-financed by EU-ESF and the Greek NSRF ; BSF , GIF and Minerva , Israel; BRF , Norway; CERCA Programme Generalitat de Catalunya , Generalitat Valenciana , Spain; the Royal Society and Leverhulme Trust , United Kingdom.
PY - 2017/11/10
Y1 - 2017/11/10
N2 - Measurements of dijet pT correlations in Pb+Pb and pp collisions at a nucleon–nucleon centre-of-mass energy of sNN=2.76 TeV are presented. The measurements are performed with the ATLAS detector at the Large Hadron Collider using Pb+Pb and pp data samples corresponding to integrated luminosities of 0.14 nb−1 and 4.0 pb−1, respectively. Jets are reconstructed using the anti-kt algorithm with radius parameter values R=0.3 and R=0.4. A background subtraction procedure is applied to correct the jets for the large underlying event present in Pb+Pb collisions. The leading and sub-leading jet transverse momenta are denoted pT1 and pT2. An unfolding procedure is applied to the two-dimensional (pT1,pT2) distributions to account for experimental effects in the measurement of both jets. Distributions of (1/N)dN/dxJ, where xJ=pT2/pT1, are presented as a function of pT1 and collision centrality. The distributions are found to be similar in peripheral Pb+Pb collisions and pp collisions, but highly modified in central Pb+Pb collisions. Similar features are present in both the R=0.3 and R=0.4 results, indicating that the effects of the underlying event are properly accounted for in the measurement. The results are qualitatively consistent with expectations from partonic energy loss models.
AB - Measurements of dijet pT correlations in Pb+Pb and pp collisions at a nucleon–nucleon centre-of-mass energy of sNN=2.76 TeV are presented. The measurements are performed with the ATLAS detector at the Large Hadron Collider using Pb+Pb and pp data samples corresponding to integrated luminosities of 0.14 nb−1 and 4.0 pb−1, respectively. Jets are reconstructed using the anti-kt algorithm with radius parameter values R=0.3 and R=0.4. A background subtraction procedure is applied to correct the jets for the large underlying event present in Pb+Pb collisions. The leading and sub-leading jet transverse momenta are denoted pT1 and pT2. An unfolding procedure is applied to the two-dimensional (pT1,pT2) distributions to account for experimental effects in the measurement of both jets. Distributions of (1/N)dN/dxJ, where xJ=pT2/pT1, are presented as a function of pT1 and collision centrality. The distributions are found to be similar in peripheral Pb+Pb collisions and pp collisions, but highly modified in central Pb+Pb collisions. Similar features are present in both the R=0.3 and R=0.4 results, indicating that the effects of the underlying event are properly accounted for in the measurement. The results are qualitatively consistent with expectations from partonic energy loss models.
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U2 - 10.1016/j.physletb.2017.09.078
DO - 10.1016/j.physletb.2017.09.078
M3 - Article
AN - SCOPUS:85037746184
VL - 774
SP - 379
EP - 402
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
SN - 0370-2693
ER -