Spin-dependent electron-proton scattering in the Delta-excitation region.
We report on measurements of the cross section and provide first data on spin correlation parameters A(TT') and A(TL') in inclusive scattering of longitudinally polarized electrons from nuclear-polarized hydrogen. Polarized electrons were injected into an electron storage ring operated at a beam energy of 720 MeV. Polarized hydrogen was produced by an atomic beam source and injected into an open-ended cylindrical cell, located in the electron storage ring. The four-momentum transfer squared ranged from Q2 = 0.2 GeV(2)/c(2) at the elastic scattering peak to Q2 = 0.11 GeV(2)/c(2) at the Delta(1232) resonance. The data provide a stringent test of pion electroproduction models.
van Buuren
L D
LD
National Institute for Nuclear Physics and High Energy Physics, NL-1009 DB Amsterdam, The Netherlands.
Szczerba
D
D
Alarcon
R
R
Boersma
D J
DJ
van den Brand
J F J
JF
Bulten
H J
HJ
Ent
R
R
Ferro-Luzzi
M
M
Harvey
M
M
Heimberg
P
P
Higinbotham
D W
DW
Klous
S
S
Kolster
H
H
Lang
J
J
Militsyn
B L
BL
Nikolenko
D
D
Norum
B E
BE
Passchier
I
I
Poolman
H R
HR
Rachek
I
I
Simani
M C
MC
Six
E
E
de Vries
H
H
Zhou
Z-L
ZL