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Jet quenching via jet collimation

J. Casalderrey-Solana, J. G. Milhano, U. Wiedemann

Abstract

The strong modifications of dijet properties in heavy ion collisions measured by ATLAS and CMS provide important constraints on the dynamical mechanisms underlying jet quenching. In this work, we show that the transport of soft gluons away from the jet cone - jet collimation - can account for the observed dijet asymmetry with values of $\hat{q}\, L$ that lie in the expected order of magnitude. Further, we show that the energy loss attained through this mechanism results in a very mild distortion of the azimuthal angle dijet distribution.

Jet quenching via jet collimation

Abstract

The strong modifications of dijet properties in heavy ion collisions measured by ATLAS and CMS provide important constraints on the dynamical mechanisms underlying jet quenching. In this work, we show that the transport of soft gluons away from the jet cone - jet collimation - can account for the observed dijet asymmetry with values of that lie in the expected order of magnitude. Further, we show that the energy loss attained through this mechanism results in a very mild distortion of the azimuthal angle dijet distribution.

Paper Structure

This paper contains 1 section, 5 equations, 1 figure.

Table of Contents

  1. References

Figures (1)

  • Figure 1: (left) Jet collimation: soft gluons emmited at small angles are transported outside the jet cone by their multiple random scatterings with medium components. (right) Azimuthal angle distribution of dijet events: the considered values of $\hat{q} L$ correspond to the cases in which either all recoiling jets are taken as interacting with the medium or only a fraction ($\sim$ 0.5) do.