[Jlab-seminars] Physics Seminar Announcement

[Luci Collins]

*Physics Seminar
Friday, May 18, 2011
11:00AM
CEBAF Center AUD.
Cookies & Coffee at 10:45AM
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*Franco Bradamante
Trieste University and INFN, Trieste Italy

"The Spin Structure of the Nucleon:
a Phenomenological Introduction and the Most Recent Results"*


After a short historical introduction on the understanding of the
structure of the proton and of the neutron, the investigation of the
spin structure of the nucleon via semi- inclusive deep inelastic
scattering on polarized nucleons is updated with the most recent
results of the Jefferson LAB, HERMES, and COMPASS experiments.  A
short description is given of these experiments, which are
complementary in phase space and use sophisticated and different
techniques to polarize the nucleon targets.  The cases of target spin
parallel or orthogonal to the direction of the incoming lepton require
different experimental techniques, have a different phenomenology and
need a different theoretical treatment. After reviewing these
differences, the most recent transverse spin advances are presented,
and evidence is given that new properties of matter at the partonic
level have been discovered.
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