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ECT 2008

Strangeness polarization in semi-inclusive and exclusive Lambda production

October 27-30, 2008
ECT*, Trento, Italy
http://www.ect.it/

Announcement:

Hyperon production in ep and pp scattering provides a direct way of probing the strange quark content of the nucleon, including its polarization. Most efforts so far have focused on semi-inclusive Lambda production through quark fragmentation in DIS. During the last years two promising new methods for studying Lambda production have emerged: semi-inclusive production through hadronization of the target remnants (target fragmentation), and exclusive production of K-Lambda states described by generalized parton distributions (GPDs). These new approaches complement and extend the reach of traditional semi-inclusive Lambda measurements and offer new ways of accessing strangeness in the nucleon and probing quark spin-orbit interactions in QCD. The aim of the workshop is to bring together researchers from the ep (HERMES, COMPASS, JLab 12 GeV, EIC) and pp (RHIC, LHC, JPARC, GSI FAIR) scattering communities to assess the potential of target fragmentation and exclusive Lambda production for strangeness polarization studies, and to plan future experiments along these lines.

Main topics:

* Strangeness polarization and nucleon structure: Ideas, current status
* Semi-inclusive Lambda production in e p: Experiments, QCD analysis, distribution and fragmentation functions
* Lambda polarization in pp: Experiments, reaction models, phenomenology
* Target fragmentation in DIS: QCD factorization, fracture functions, experimental status and prospects
* Exclusive Lambda production: Theory, GPD phenomenology, experimental prospects
* Lambda production with a future Electron-Ion Collider (EIC)
* Lambda production in pp/pbar-p at LHC, GSI FAIR and JPARC

Supported by ECT* Trento, Jefferson Lab, and other sources of funding.

The organizers of the workshop are:

H. Avakian (Jefferson Lab)
N. Makins (U. Illinois Urbana Champaign)
A. Schaefer (Regensburg U.)
C. Weiss (Jefferson Lab)