Abstract
We present predictions for jet suppression from small to intermediate to very large radius, for high energy jets created in heavy ion collisions at the LHC. We find that jet suppression is surprisingly independent of the anti-kT radius R, first slightly increasing as one increases R, then at larger values of Rvery slowly decreasing. This behavior arises from two competing effects, namely the larger energy loss of the hard jet components, which tends to increase suppression, versus the partial recovery of the lost energy due to medium response, reducing suppression.
Highlights
Introduction.—The strong yield suppression and substructure modification observed in the analysis of the high pT jets produced in heavy ion collisions compared to those measured in nucleon-nucleon collisions is ascribable to the production of deconfined QCD matter
The strong correlations among the thousands of low pT particles created in such nucleus-nucleus collisions can be very well described by hydrodynamic simulations of an exploding droplet of hot QCD liquid [2], known as the quark-gluon plasma (QGP)
In this work we study the observable effects of energy and momentum hydrodynamization in the phenomenological description of jet suppression in heavy ion collisions
Summary
Institutt for fysikk og teknologi, University of Bergen, Postboks 7803, 5020 Bergen, Norway (Received 28 August 2019; revised manuscript received 2 December 2019; accepted 18 December 2019; published 3 February 2020). Introduction.—The strong yield suppression and substructure modification observed in the analysis of the high pT jets produced in heavy ion collisions compared to those measured in nucleon-nucleon collisions is ascribable to the production of deconfined QCD matter. These modifications, typically referred to as jet quenching phenomena [1], arise from the interaction of the energetic colored charges formed through parton showers with the QCD medium. Having a larger jet radius R means that the jet retains a larger fraction of the widely distributed energy and momentum deposited in the plasma These competing effects yield a jet suppression that is remarkably independent of the jet radius R across a vast range in jet pT. We further show that the medium response caused by the energy deposited by the recoiling jet has
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