Analysis of low-mass dilepton enhancement - Vargyas, Márton
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This book, an M.Sc. thesis in experimental nuclear physics, reports on a difficult and unresolved puzzle of relativistic heavy ion collisions: the enhanced production of low-mass lepton pairs in 200 GeV Au+Au collisions, as observed by the PHENIX experiment at Brookhaven National Laboratory's Relativistic Heavy Ion Collider. Two partial explanations are given: The first is a possible in-medium mass modification of the eta' mesons, a signal of a symmetry restoration in hot and dense hadronic matter, inspired by theoretical models and a recent indirect measurement. These in-medium modified eta'…mehr

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Produktbeschreibung
This book, an M.Sc. thesis in experimental nuclear physics, reports on a difficult and unresolved puzzle of relativistic heavy ion collisions: the enhanced production of low-mass lepton pairs in 200 GeV Au+Au collisions, as observed by the PHENIX experiment at Brookhaven National Laboratory's Relativistic Heavy Ion Collider. Two partial explanations are given: The first is a possible in-medium mass modification of the eta' mesons, a signal of a symmetry restoration in hot and dense hadronic matter, inspired by theoretical models and a recent indirect measurement. These in-medium modified eta' mesons leave behind a fingerprint, their enhanced production in vacuum, that lead to enhanced dilepton production via the Dalitz-decay of eta' - (e+ e- photon). As the enhancement is restricted to the soft transverse momentum region of pT
Autorenporträt
Márton Vargyas was born in 1987, and graduated at Eötvös Loránd University in Physics in 2012. From 2010 he is a member of the PHENIX Collaboration. Currently, he is trying to explain the excess of the PHENIX dilepton spectrum as the effect of chiral symmetry restoration.