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Prof. Wen-Chen Chang, "Study Nucleon Partonic Structure at High-Momentum Beamline at J-PARC" (Radiation Lab Seminar)
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Asia/Tokyo
Main Bldg. 435/437
Main Bldg. 435/437
Description
(time is tentative, but afternoon)
Study Nucleon Partonic Structure at High-Momentum Beamline at J-PARC
Professor Wen-Chen Chang
Institute of Physics, Academia Sinica, Taipei 11529, Taiwan
changwc@phys.sinica.edu.tw
Nucleon partonic structure can be accessed either by deep inelastic scattering (DIS)
with lepton beams or by Drell-Yan (DY) processes with hadron beams. With great
experimental efforts, the nucleon parton distributions as a function of longitudinal-
momentum fraction x (PDFs) have been obtained. Nevertheless the structures of
valance and sea quarks at large-x regions are still not well known. In addition the
next-generation nucleon parton distribution with additional dependence on the
transverse size has been formulated as “generalized parton distributions” (GPDs) such
that the role of partonic orbital angular momentum in the overall nucleon spin could
be . The determination of GPDs is mostly done by the exclusive hard processes with
lepton beams such like deeply virtual Compton scattering (DVCS) and deeply virtual
meson production (DVMP).
After the completion of the high-momentum beamline project, 10-20 GeV/c high-
intensity pion and kaon beams will be available in the Hadron Hall of J-PARC. In this
talk we will introduce how the large-x partonic structures and the GPDs of nucleons
could be measured by the inclusive and exclusive Drell-Yan processes with the
hadron beams at J-PARC. The results of feasibility study within the future E50 setup
will be shown.
The agenda of this meeting is empty