2003/10/24 by Carlos A. Salgado, Urs Achim Wiedemann · 4 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevlett.93.042301
published as Phys.Rev.Lett. 93 (2004) 042301 · 4 pages, Latex, 3 eps figures. version2: error in eq. (6) corrected, Fig. 2 changed accordingly, conclusions unchanged
arxiv created 2003/10/24 · openalex publication_date 2004/07/20 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
Medium-induced parton energy loss is widely considered to underlie the suppression of high-pt leading hadron spectra in square root sNN = 200 GeV Au+Au collisions at the Relativistic Heavy Ion Collider (RHIC). Its description implies a characteristic kt broadening of the subleading hadronic fragments associated with the hard parton. However, this latter effect is more difficult to measure and has remained elusive so far. Here, we discuss how it affects genuine jet observables, which are accessible at the Large Hadron Collider and possibly at RHIC. We find that the kt broadening of jet multiplicity distributions provides a very sensitive probe of the properties of dense QCD matter, whereas the sensitivity of jet energy distributions is much weaker. In particular, the sensitive kinematic range of jet multiplicity distributions is almost unaffected by the high multiplicity background.