ALICE measures the radial jet-energy flow observable Δp_T in Pb-Pb (5.02 TeV) and pp (13 TeV) collisions and reports narrowing of the energy distribution in heavy-ion collisions at 3.5-4.5σ significance.
Particle-level pileup subtraction for jets and jet shapes
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abstract
We present an extension to the jet area-based pileup subtraction for both jet kinematics and jet shapes. A particle-level approach is explored whereby the jet constituents are corrected or removed using an extension of the methods currently being employed by the LHC experiments. Several jet shapes and nominal jet radii are used to assess the performance in simulated events with pileup levels equivalent to approximately 30 and 100 interactions per bunch crossing, which are characteristic of both the LHC Run I and Run II conditions. An improved performance in removing the pileup contributions is found when using the new subtraction method. The performance of the new procedure is also compared to other existing methods.
representative citing papers
An LSTM model trained on simulated jet substructure learns to predict true jet energy loss and distinguishes quenching signatures even after realistic detector effects are applied.
citing papers explorer
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Modification of jet-energy flow in heavy-ion collisions
ALICE measures the radial jet-energy flow observable Δp_T in Pb-Pb (5.02 TeV) and pp (13 TeV) collisions and reports narrowing of the energy distribution in heavy-ion collisions at 3.5-4.5σ significance.