Polarization transfer in the 4He(e-->,e'p-->)3H reaction up to Q2=2.6 (GeV/c)2.
We have measured the proton recoil polarization in the 4He(e-->,e(')p-->)4H reaction at Q(2)=0.5, 1.0, 1.6, and 2.6 (GeV/c)(2). The measured ratio of polarization transfer coefficients differs from a fully relativistic calculation, favoring the inclusion of a medium modification of the proton form factors predicted by a quark-meson coupling model. In addition, the measured induced polarizations agree reasonably well with the fully relativistic calculation indicating that the treatment of final-state interactions is under control.
Strauch
S
S
Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, USA.
Dieterich
S
S
Aniol
K A
KA
Annand
J R M
JR
Baker
O K
OK
Bertozzi
W
W
Boswell
M
M
Brash
E J
EJ
Chai
Z
Z
Chen
J-P
JP
Christy
M E
ME
Chudakov
E
E
Cochran
A
A
De Leo
R
R
Ent
R
R
Epstein
M B
MB
Finn
J M
JM
Fissum
K G
KG
Forest
T A
TA
Frullani
S
S
Garibaldi
F
F
Gasparian
A
A
Gayou
O
O
Gilad
S
S
Gilman
R
R
Glashausser
C
C
Gomez
J
J
Gorbenko
V
V
Gueye
P L J
PL
Hansen
J O
JO
Higinbotham
D W
DW
Hu
B
B
Hyde-Wright
C E
CE
Ireland
D G
DG
Jackson
C
C
de Jager
C W
CW
Jiang
X
X
Jones
C
C
Jones
M K
MK
Kellie
J D
JD
Kelly
J J
JJ
Keppel
C E
CE
Kumbartzki
G
G
Kuss
M
M
LeRose
J J
JJ
Livingston
K
K
Liyanage
N
N
Malov
S
S
Margaziotis
D J
DJ
Meekins
D
D
Michaels
R
R
Mitchell
J H
JH
Nanda
S K
SK
Nappa
J
J
Perdrisat
C F
CF
Punjabi
V A
VA
Ransome
R D
RD
Roché
R
R
Rosner
G
G
Rvachev
M
M
Sabatie
F
F
Saha
A
A
Sarty
A
A
Udias
J M
JM
Ulmer
P E
PE
Urciuoli
G M
GM
van den Brand
J F J
JF
Vignote
J R
JR
Watts
D P
DP
Weinstein
L B
LB
Wijesooriya
K
K
Wojtsekhowski
B
B