12th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions

Session

Parallel 14: jet theory

24 Sept 2024, 10:50

DEJIMA MESSE NAGASAKI

Conveners

Parallel 14: jet theory

• Pol-Bernard GOSSIAUX

89. Measurements of Baryon-to-Meson Ratios Inside Jets in Au+Au and $p$+$p$ Collisions at $\sqrt{s_{NN}} = 200$ GeV at STAR

Gabe Dale-Gau (University of Illinois at Chicago)

24/09/2024, 10:50

1. Jets modification and medium response

Oral presentation

Measurements at RHIC and the LHC show strongly enhanced inclusive hadron baryon-to-meson yield ratios at intermediate transverse momenta ($p_{\rm{T}}$) in high-energy nuclear collisions compared to $p$+$p$ baseline. This enhancement is attributed to strong hydrodynamic flow and parton recombination in the Quark-Gluon Plasma (QGP). Jet probes have been used extensively to gain insights into...

56. Probing jet hadrochemistry and charged-particle jet radial profile modifications in pp and Pb--Pb collisions with ALICE

Sierra Lisa Weyhmiller (Yale University (US))

24/09/2024, 11:10

1. Jets modification and medium response

Oral presentation

Jet substructure measurements in heavy-ion collisions provide constraints on jet quenching and the medium response in the QGP. Though there has been remarkable progress in inclusive-charged-hadron jet substructure measurements, understanding the identified particle composition of jets and their modification in heavy-ion collisions remains elusive. Jet quenching models predict that the jet...

252. EFT-based factorization of jet quenching observables in heavy ion collisions

Dr Yacine Mehtar-Tani (Brookhaven National Laboratory)

24/09/2024, 11:30

1. Jets modification and medium response

Oral presentation

Using an open quantum system EFT approach we derive a factorization formula for the cross-section of inclusive jet production in heavy ion collisions as a series with an increasing number of independently radiating subject functions resolved by the Quark Gluon Plasma medium, convolved with perturbative matching coefficients. In a strongly coupled system, each term in this series is a distinct...

197. Jet Drift in Heavy Ion Collisions

Joseph Bahder

24/09/2024, 11:50

1. Jets modification and medium response

Oral presentation

We introduce a sub-eikonal anisotropic contribution to jet-broadening, "jet drift", that couples to the flow of the medium, showing that this effect results in a deflection of hard partons, and thus jets, in the direction of the medium flow. Next, we study this effect in both toy models and a full-fledged hybrid transport simulation of √s = 5.02 TeV PbPb collisions at the LHC, tracking...

33. Jet entropy as a probe of jet collimation

João Barata

24/09/2024, 12:10

1. Jets modification and medium response

Oral presentation

As QCD jets fragment in vacuum, the entropy of their hardest constituents increases proportionally to the subjet multiplicity. When the cascade takes place in the presence of a dense QCD plasma, the entropy growth is slowed down due to the transport of the jet’s energy to the medium. This feature is connected to the quenching of active color sources inside the jet, collimating the partonic cascade.