10/29/00
R. Seto
Faking up the saturation
nModel a gluon
distribution
nFor proton use
GRV94.
nFor Nucleus start with GRV94. For x2<10-2 flatten gluon distribution.
nNote: the Nucleus side was modeled as a
neutron
nIn the exp’t,
compare pp, pd, pA.
nx1, x2 – fraction of
nucleon momentum carried by parton
nX2 Refers to
Nucleus
nLow x2 will be at
high y
Log(x)
Q2=10
Q2=3
“Flattened”Gluon Distribution
xG(x)
x2
x1
+y