10/29/00
R. Seto
Nucleus as amplifier of gluon density
n
n
n
n
nxpG(xp)=A1/3xAG(xA) i.e. gluon density is 7x higher in Gold at high energies nAssume xG(x)~x-d where d=0.2 to 0.5
nxp ~ 10-1.5 to 10-4 xA For A=197
nCalculation of saturation region (Golec-Biernat, Wusthoff PRD 59,014017, 1998) nNeed to reach ~10-4 for xp        č xA ~ 10-2
n
n
Saturation
Region
dN/dy ~ R3 ~ A
proton
Nucleus