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In these proceedings, we discuss the role of heavy quark mass on the formation of parton showers. Mass effects are not well understood when parton branching occurs in nuclear matter, such as the quark-gluon plasma. Recently, a theoretically…

High Energy Physics - Phenomenology · Physics 2022-01-26 Ivan Vitev

We show the sensitivity of groomed jet substructure measurements to the finite resolution power of the QGP to disentangle multiple energetic partons, as produced by QCD jets, that traverse it simultaneously. We illustrate these effects by…

High Energy Physics - Phenomenology · Physics 2021-02-03 Jorge Casalderrey-Solana , Guilherme Milhano , Daniel Pablos , Krishna Rajagopal

The Linear Boltzmann Transport (LBT) model for jet propagation and interaction in quark-gluon plasma (QGP) has been used to study jet quenching in high-energy heavy-lion collisions. The suppression of single inclusive jet production, medium…

Nuclear Theory · Physics 2019-02-20 Yayun He , Shanshan Cao , Wei Chen , Tan Luo , Long-Gang Pang , Xin-Nian Wang

Jet quenching provides a very flexible variety of observables which are sensitive to different energy- and time-scales of the strongly interacting matter created in heavy-ion collisions. Exploiting this versatility would make jet quenching…

High Energy Physics - Phenomenology · Physics 2020-03-02 Carlota Andres , Néstor Armesto , Harri Niemi , Risto Paatelainen , Carlos A. Salgado

For jets, with great power comes great opportunity. The unprecedented center of mass energies available at the LHC open new windows on the QGP: we demonstrate that jet shape and jet cross section measurements become feasible as a new,…

High Energy Physics - Phenomenology · Physics 2009-05-20 Ivan Vitev , Simon Wicks , Ben-Wei Zhang

To probe the properties of the quark-gluon plasma created in heavy-ion collisions, a very useful class of observables refers to the propagation of energetic jets. A jet is a collimated spray of particles generated via successive parton…

High Energy Physics - Phenomenology · Physics 2020-10-07 Paul Caucal

Measurements of jet substructure observables in heavy-ion (HI) collisions provide powerful constraints on the microscopic mechanisms of interactions between energetic partons and the quark--gluon plasma (QGP). Although there has been…

Nuclear Experiment · Physics 2025-11-14 Sierra Cantway

High $p_T$ jets are known to be strongly modified by the dense, strongly interacting medium created in heavy-ion collisions. The jet signal, extracted from two particle $\Delta\phi$ correlation, shows a systematic evolution of these…

Nuclear Experiment · Physics 2009-11-11 Jiangyong Jia

These proceedings report recent studies performed by the ALICE, ATLAS and CMS experiments on jet substructure in pp and Pb+Pb collisions at 5.02 TeV. The dependence of the modification of the jet shape on the dijet transverse moment um…

Nuclear Experiment · Physics 2022-09-21 Helena Santos

Particle azimuthal anisotropies inside jets, defined within the momentum plane perpendicular to the jet axis, carry the information of the QCD cascade process for jet formation. In this work, we propose to measure the medium-induced…

High Energy Physics - Phenomenology · Physics 2025-07-30 Meng-Quan Yang , Wei-Xi Kong , Peng Ru , Ben-Wei Zhang

The ATLAS Collaboration has developed a method to analyze large-radius jets composed of skinny $R=0.2$ subjets in heavy-ion collisions. We first demonstrate that the measurements pioneered by ATLAS constrain the value of $L_{\rm res}$, the…

High Energy Physics - Phenomenology · Physics 2025-03-31 Arjun Srinivasan Kudinoor , Daniel Pablos , Krishna Rajagopal

Jet substructure observables are crucial for exploring the effects of the hot, dense medium and differentiating between quark and gluon jets. In this paper, we investigate the modification of jet shape by calculating the differential girth…

High Energy Physics - Phenomenology · Physics 2023-02-28 Si-Yu Tang , Wei Zhang , Wen-Di Deng , Cheng-De Tian , Fan Yang , Ren-Zhuo Wan

We demonstrate that jet observables are highly sensitive to the characteristics of the vacuum and the in-medium QCD parton showers and propose techniques that exploit this sensitivity to constrain the mechanism of quark and gluon energy…

High Energy Physics - Phenomenology · Physics 2010-04-08 Ivan Vitev , Ben-Wei Zhang

Jet modification in heavy-ion collisions is an important probe of the nature and structure of the quark-gluon plasma (QGP) produced in these collisions and also encodes information about how the wakes that jets excite in a droplet of QGP…

High Energy Physics - Phenomenology · Physics 2020-09-09 Jasmine Brewer , Quinn Brodsky , Krishna Rajagopal

We study high-pt jets from QCD and from highly-boosted massive particles such as tops, W, Z and Higgs, and argue that infrared-safe observables can help reduce QCD backgrounds. Jets from QCD are characterized by different patterns of energy…

High Energy Physics - Phenomenology · Physics 2014-11-18 Leandro G. Almeida , Seung J. Lee , Gilad Perez , George Sterman , Ilmo Sung , Joseph Virzi

The energy loss of a hard parton is regarded as a useful tool to probe properties of a soft medium. However, the information obtained by a measurement of the nuclear suppression R_AA is not very sensitive to medium properties. Thus, more…

High Energy Physics - Phenomenology · Physics 2007-05-23 Thorsten Renk

The "jet-quenching" interpretation of suppressed high-pT hadron production at RHIC implies that jet multiplicity distributions and jet-like particle correlations in heavy-ion collisions at RHIC and LHC differ strongly from those seen at…

High Energy Physics - Phenomenology · Physics 2007-05-23 Nicolas Borghini , Urs Achim Wiedemann

The study of the structure of strongly interacting dense matter via hard jets is reviewed. High momentum partons produced in hard collisions produce a shower of gluons prior to undergoing the non-perturbative process of hadronization. In…

High Energy Physics - Phenomenology · Physics 2011-07-14 A. Majumder , M. Van Leeuwen

We study the jet quenching parameter $\hat q$ in a non-equilibrium plasma using the QCD effective kinetic theory. We discuss subleading terms at large jet momentum p, show that our expression for $\hat q$ reproduces thermal results at small…

High Energy Physics - Phenomenology · Physics 2025-06-25 Kirill Boguslavski , Aleksi Kurkela , Tuomas Lappi , Florian Lindenbauer , Jarkko Peuron

We present a comprehensive review of the physics of hadron and jet production at large transverse momentum in high-energy nucleus-nucleus collisions. Emphasis is put on experimental and theoretical "jet quenching" observables that provide…

Nuclear Experiment · Physics 2015-05-13 David d'Enterria
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