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Jet energy scale and its uncertainty for jets reconstructed using the ATLAS heavy ion jet algorithm

The jet energy scale (JES) and its systematic uncertainty are determined for jets measured with the ATLAS detector at the LHC, reconstructed using techniques developed for jet measurements for heavy ion (HI) collisions. The JES is constructed by calibrating the HI jets with respect to the standard j...

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Detalles Bibliográficos
Autor principal: The ATLAS collaboration
Lenguaje:eng
Publicado: 2015
Materias:
Acceso en línea:http://cds.cern.ch/record/2008677
Descripción
Sumario:The jet energy scale (JES) and its systematic uncertainty are determined for jets measured with the ATLAS detector at the LHC, reconstructed using techniques developed for jet measurements for heavy ion (HI) collisions. The JES is constructed by calibrating the HI jets with respect to the standard jets using the analysis of proton-proton pp collision data. The latter have a well-defined calibration procedure and uncertainty that includes input from various data-driven studies. The calibration of the HI jets is performed using sqrt(s)=8 TeV pp data recorded in 2012 where the performance of the standard jets is well understood. A procedure to adapt the HI JES and its uncertainty to different data samples recorded by ATLAS including pp collisions at sqrt(s)=2.76 TeV, Pb+Pb collisions at sqrt(s_NN)=2.76 TeV and p+Pb collisions at sqrt(s_NN)=5.02 TeV is presented. Finally, the energy scale for jets affected by quenching is studied using Monte Carlo and the uncertainties on the JES obtained from this procedure are validated in data.