TY  - EJOUR
TI  - Measurement of dijet p<sub>T</sub> correlations in Pb+Pb and pp collisions at √{s<sub>NN</sub>}=2.76 TeV with the ATLAS detector
IS  - ATLAS-CONF-2015-052
M1  - PUBDB-2015-04070
M1  - ATLAS-CONF-2015-052
PY  - 2015
AB  - Measurements of dijets in both Pb+Pb and pp collisions at a nucleon-nucleon centre-of-mass energy of √{s<sub>NN</sub>}=2.76 TeV are presented. The measurements were performed with the ATLAS detector at the LHC using data samples with integrated luminosities of 0.14 nb<sup>−1</sup> and 4.0 pb<sup>−1</sup> for the Pb+Pb and pp data samples, respectively. Jets were reconstructed using the anti-k<sub>t</sub> algorithm with R=0.4. A background subtraction procedure was applied to correct the jet kinematics for the large underlying event present in Pb+Pb collisions. Measurements are reported of the normalized yields \frac1N\fracdNdx<sub>J</sub>, where x<sub>J</sub>=p<sub>T<sub>2</sub></sub> / p<sub>T<sub>1</sub></sub> and  p<sub>T<sub>1</sub></sub> and p<sub>T<sub>2</sub></sub> are the leading and subleading jet transverse momenta, respectively. The results are presented as a function of p<sub>T<sub>1</sub></sub> and collision centrality. The results were obtained by measuring the two-dimensional p<sub>T<sub>1</sub></sub>−p<sub>T<sub>2</sub></sub> distributions and applying an unfolding procedure to account for experimental resolution in the measurement of both jets' transverse momenta simultaneously. The distributions are found to be similar in peripheral Pb+Pb collisions and pp collisions, but highly modified in central Pb+Pb collisions. The results are consistent with expectations from partonic energy loss.
LB  - PUB:(DE-HGF)25 ; PUB:(DE-HGF)15
DO  - DOI:oai:cds.cern.ch:2055673
UR  - https://bib-pubdb1.desy.de/record/275502
ER  -