Speaker
Vassili Papavassiliou
(New Mexico State University)
Description
The PHENIX experiment at RHIC studied the $A$-dependence of transverse,
single-spin asymmetries in production of charged hadrons in collisons
of polarized protons with aluminum and gold nuclei, as well as with
protons. The measurements covered forward rapidities, between 1.4 and
2.4, over the transverse-momentum range of 1.8 to 7 GeV$/c$. We report
on the observation of a significant asymmetry in $p+p$ collisions, while
the asymmetry is smaller for $p+$Al and consistent with zero for $p+$Au
collisions. This observed $A$-dependence can provide important clues
regarding transverse-spin dynamics in nucleon structure and hadron
production.
Author
Vassili Papavassiliou
(New Mexico State University)
