[Jlab-seminars] Special Seminar Announcement

[Luci Collins]

*Special Seminar**
Monday, August 30, 2010
11:00AM
CEBAF Center AUD.
Cookies & Coffee at 10:45AM

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"Feasibility Test of Large Rapidity Drell Yan Production at RHIC"

 LC Bland
 BNL

 There are common objectives at RHIC, Jefferson Lab and a future 
electron-ion collider (EIC) to understand the quark and gluon structure 
of the proton.  Perturbative QCD provides a means of describing 
observables for p+p/p+nucleus collisions and deep inelastic scattering 
(DIS) in terms of universal distribution and fragmentation functions. 
Recent experiments aimed at understanding proton spin structure have 
shown the importance of spin-correlated, transverse-momentum-dependent 
distribution functions, that describe orbital motion of quarks and 
gluons. Color-charge interactions are required for these functions to 
produce transverse single spin asymmetries.  There is a firm theoretical 
prediction that these color charge interactions change sign between 
semi-inclusive DIS and di-lepton production, through the Drell Yan (DY) 
process, in polarized p+p collisions.  This talk will present plans for 
a feasbility experiment at RHIC, aiming to test these theoretical 
predictions by measuring the analyzing power for DY in the forward 
direction. Results from the feasibility experiment can impact designs of 
future forward detectors aimed at quantifying effects from saturation of 
the gluon density at low x in heavy nuclei.  The DY process is expected 
to be the most robust probe of universality between p+p/p+nucleus and 
DIS, with the latter being a focus at the upgraded Jefferson Lab and a 
future EIC.










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