### Jet-Quenching Primer

This post provides survey of the absolute must-read theory papers on jet energy-loss:

The first paper on the collisional energy loss of a parton in a quark-gluon plasma is the seminal manuscript of the field. Bjorken withdrew it after it was pointed out that the dominant energy loss mechanism at high energy is gluon radiation, not elastic scattering on a plasma particle. It was never published, but is available from the KEK preprint library of scanned manuscripts:

The following two articles first investigated the effect of multiple scattering in a quark-gluon plasma on the angular correlation between two back-to-back jets. The Blaizot-McLerran paper is a more detailed investigation of the mechanism

proposed by Appel:

The following article contains the first complete calculation of collisional energy

loss in the hard-thermal loop approach to thermal QCD:

The following article introduced the phenomenology of the ratio R_AA for the

suppression of leading hadrons as a measure of parton energy loss:

The subsequent two articles proposed the multiple scattering of partons in a QCD medium modeled by a collection of soft color potentials as the mechanism for radiative energy loss in QCD. The calculations missed the crucial re-scattering of the radiated gluon within the medium:

**Multiple collisions and induced gluon Bremsstrahlung in QCD****The LPM effect in QCD and radiative energy loss in a quark gluon plasma**

This article first proposed back-to-back photon-jet coincidences as the *gold-plated* observable for the measurement of parton energy loss:

The following three articles correctly solved the problem of radiative energy loss of a fast parton in QCD, including multiple scattering of the parton and the radiated gluon. The Baier-Dokshitzer-Mueller-Peigne-Schiff (BDMPS) approach (first two articles) and the Zakharov approach (3rd article) were shown to be completely equivalent:

**Radiative energy loss and p(T) broadening of high-energy partons in nuclei****Radiative energy loss of high-energy quarks and gluons in a finite volume quark – gluon plasma****Radiative energy loss of high-energy quarks in finite size nuclear matter and quark – gluon plasma**

An extension of the BDMPS formalism to arbitrary opacity of the medium using an eikonal approach is developed in the following article:

The following review article describes the BDMPS theory of parton energy loss:

The next two articles established the GLV approach to parton energy loss, which is an extension of the Gyulassy-Wang model to include gluon rescattering applicable to an *optically thin* medium:

The next two articles developed the higher-twist approach to parton energy loss,

which is based on the multiple scattering formalism of Luo, Qiu and Sterman.

The formalism assumes that only a single re-scattering occurs before the parton

escapes from the medium:

**Multiple scattering, parton energy loss and modified fragmentation functions in deeply inelastic e A scattering****Multiple parton scattering in nuclei: Parton energy loss**

The following article laid the foundation for a probabilistic treatment of radiative energy loss by a fast parton in QCD matter within the framework of the BDMPS/Wiedemann approach in terms of “quenching weights”:

The following article contains an extensive review of jet quenching theory

up to 2003:

The following article outlines the theory of parton energy loss based on the

Arnold-Moore-Yaffe (AMY) formalism for the Landau-Pomeranchuk-Migdal

effect in a thermal QCD medium:

The next article concisely surveys the different schemes for parton energy loss

and jet quenching and draws comparisons among them:

The following three articles address energy loss by a heavy quark. The first article calculates collisional energy loss in the HTL approach; the second article calculates radiative energy loss in the BDMPS formalism and points out the “dead-cone” effect for a heavy quark; the third article contains a calculation of radiative energy loss in the (D)GLV formalism: