13th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions

Session

Parallels: High-PT

HPT

23 Jun 2026, 14:00

Vanderbilt University

Conveners

Parallels: High-PT

• Gojko Vujanovic (University of Regina)

61. Dijet probes for event-geometry biases in p+A collisions at ATLAS

Radek Jirasek (Charles University (CZ))

23/06/2026, 14:00

Oral presentation

Proton–nucleus collisions at the LHC provide a powerful laboratory to investigate initial-state phenomena in heavy-ion physics. Fluctuations in the proton configuration can significantly modify its effective interaction strength, biasing estimates of event activity and, consequently, the inferred number of wounded nucleons in the Pb nucleus. In this context, dijets offer a particularly...

302. First exploration of hard-soft correlations from IP-Glasma

Coleridge Faraday (University of Cape Town)

23/06/2026, 14:20

Nuclear PDFs, saturation, and early-time dynamics

Oral presentation

We present the first self-consistent, first-principles, event-by-event framework for high-$p_T$ hadron production that incorporates correlated hard and soft particle production within a single theoretical approach. Using IP-Glasma, the model simultaneously generates the hard $\sim 10$ GeV gluon spectrum and the soft $\lesssim 3$ GeV gluon multiplicity, both subsequently hadronized, enabling a...

297. Hard Photons as Standard Candles of Centrality in Small Systems

Robert Dolan (Wayne State University)

23/06/2026, 14:40

1

Electromagnetic and electroweak probes

Oral presentation

One of the primary biases in event classification for small-system ($p/d+A$) collisions is thought to be depletion of the energy available for soft production by hard scatterings in high activity events. This may potentially mask any real suppression or enhancement in the nuclear modification factor $R_{p/d\,A}$. In this work, the X-SCAPE framework is used to simulate $d+Au$ collisions at top...

292. Measurement of two-particle correlation in high energy e+e- collisions with enhanced W⁺W⁻ contributions using the ALEPH archived data

Yu-Chen (Janice) Chen (Massachusetts Institute of Technology)

23/06/2026, 15:00

1

Oral presentation

Studies of high charged-particle multiplicity events have been a central focus in enhancing sensitivity to the possible emergence of collective-like behavior, even in e⁺e⁻ collisions. We present a measurement of two-particle angular correlations using data collected by the ALEPH detector during the LEP2 program in e⁺e⁻ collisions at center-of-mass energies up to √s = 209 GeV, with a focus on...