{"product_id":"analysis-of-low-mass-dilepton-enhancement-in-200-gev-au-au-collisions-von-marton-vargyas","title":"Analysis of low-mass   dilepton enhancement","description":"\u003cp\u003eThis 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' -\u0026gt; (e+ e- photon). As the enhancement is restricted to the soft transverse momentum region of pT \u0026lt; 2 GeV, the second partial explanation considers a hydrodynamically motivated momentum distribution of directly produced mesons, instead of an earlier spectrum model, that neglected radial flow effects.\u003c\/p\u003e\u003cdiv class=\"aw-variant-hidden-subtitle-div\" id=\"aw-variant-subtitle-9783659242304\"\u003e\u003ch3\u003eIn 200 GeV Au+Au collisions\u003c\/h3\u003e\u003c\/div\u003e","brand":"Libri","offers":[{"title":"Softcover - 9783659242304","offer_id":39427824517213,"sku":"9783659242304","price":49.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0622\/files\/1f6d4f37-4676-49eb-b0fe-ed70597b47fd.jpg?v=1773380398","url":"https:\/\/shop.autorenwelt.de\/products\/analysis-of-low-mass-dilepton-enhancement-in-200-gev-au-au-collisions-von-marton-vargyas","provider":"Autorenwelt Shop","version":"1.0","type":"link"}