1202.3377 (David Kleinjan et al.)

Measurement of the transverse Single Spin Asymmetry of Forward Eta
Mesons in $p^{\uparrow}+p$ Collisions in PHENIX    [PDF]

David Kleinjan, for the PHENIX collaboration

Polarized $p+p$ collisions provide insight into the structure of the nucleon.
$A_N$ of eta mesons at forward rapidities are of particular interest, as
asymmetries of other mesons observed both by PHENIX and other experiments show
significant deviation from zero in the forward region. Several mechanisms have
been proposed that attempt to explain these non-zero asymmetries, and a
comparison of different probes may further constrain these models. Therefore,
measurements of $A_N$ with inclusive eta mesons at forward rapidities are an
important tool toward understanding the underlying mechanism. Using the PHENIX
detector at the Relativistic Heavy Ion Collider (RHIC), we study
$p^{\uparrow}+p$ collisions. In 2008, the PHENIX experiment collected 5.2
pb$^{-1}$ integrated luminosity in $p^\uparrow+p$ collisions at $\sqrt{s}$ =
200 GeV. The asymmetry analysis of eta mesons at forward rapidity will be
discussed.

View original: http://arxiv.org/abs/1202.3377