Parts | Days | Selection | Search | Downloads | Help

HK: Fachverband Hadronen und Kerne

HK 2: Plenary II

HK 2.2: Invited Talk

Monday, March 16, 2009, 11:30–12:00, Audi-Max

The structure of the nucleon from DIS experiments — •Franco Bradamante — Trieste University and INFN Section

An update is given of the QCD structure of the nucleon as it has been unveiled in DIS experiments. Emphasis will be given to the most recent results from the experiments which use polarized lepton beams and/or polarized targets, namely the HERMES experiment at DESY and the COMPASS experiment at CERN. In these experiments identification of the hadrons in the current jet has made tagging of the struck quark possible, thus allowing flavour separation of the parton distributions.

An important step forward in the understanding of the nucleon structure is the recent extraction of the transversity distributions. These distributions describe the correlations between the quark spin and the nucleon spin in a transversely polarized nucleon, and are believed to play a role in the various transverse spin effects which have been known since many years in hadron-hadron reactions and are still unexplained.