Measurement of the production of neighbouring jets in lead-lead collisions at root s(NN)=2.76TeV with the ATLAS detector
2015 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 751, 376-395 p.Article in journal (Refereed) Published
This Letter presents measurements of correlated production of nearby jets in Pb+Pb collisions at root s(NN) = 2.76 TeV using the ATLAS detector at the Large Hadron Collider. The measurement was performed using 0.14 nb(-1)of data recorded in 2011. The production of correlated jet pairs was quantified using the rate, R-Delta R, of "neighbouring" jets that accompany "test" jets within a given range of angular distance, Delta R, in the pseudorapidity-azimuthal angle plane. The jets were measured in the ATLAS calorimeter and were reconstructed using the anti-ktalgorithm with radius parameters d = 0.2, 0.3, and 0.4. R-Delta R was measured in different Pb+Pbcollision centrality bins, characterized by the total transverse energy measured in the forward calorimeters. Acentrality dependence of R-Delta R is observed for all three jet radii with R-Delta R found to be lower in central collisions than in peripheral collisions. The ratios formed by the R-Delta R values in different centrality bins and the values in the 40-80% centrality bin are presented.
Place, publisher, year, edition, pages
2015. Vol. 751, 376-395 p.
IdentifiersURN: urn:nbn:se:uu:diva-280795DOI: 10.1016/j.physletb.2015.10.059ISI: 000365384600061OAI: oai:DiVA.org:uu-280795DiVA: diva2:912113
ATLAS Collaboration, for complete list of authors see http://dx.doi.org/10.1016/j.physletb.2015.10.0592016-03-152016-03-152016-03-15Bibliographically approved