Conférences et séminaires » Séminaire du Dr Stefan BATHE

Séminaire du Dr Stefan BATHE

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Direct photon production at RHIC.

Dr Stefan BATHE

( University of California at Riverside& Brookhaven National Laboratory)

le Vendredi 24 Mars 2006 à 14h30

Salle de Visioconférences du bâtiment 25
IReS, 23 rue du Loess, Strasbourg-Cronenbourg

Abstract :

Direct photons do not interact strongly with the medium produced in relativistic heavy-ion collisions, which makes them an exceptional observable : at intermediate pT they provide information on the early stage of the collision ; at high pT they constitute a crucial reference for the medium modification of high-pT hadron production which has been observed.

The PHENIX experiment at RHIC has found a significant excess of direct photons above the decay-photon background in Au+Au collisions at 200 GeV at both intermediate and high pT. Furthermore, direct photon production in p+p and d+Au collisions has been measured, allowing a fundamental test of QCD as well as constraining the effects of cold nuclear matter. A systematic study of direct photon production will be presented and put into the context of theoretical models and earlier measurements.

Personnes a contacter :

Thierry PRADIER

Denis GELE

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