New measurements of the European Muon Collaboration effect in very light nuclei.
New Jefferson Lab data are presented on the nuclear dependence of the inclusive cross section from (2)H, (3)He, (4)He, (9)Be and (12)C for 0.3 < x < 0.9, Q(2) approximately 3-6 GeV(2). These data represent the first measurement of the EMC effect for (3)He at large x and a significant improvement for (4)He. The data do not support previous A-dependent or density-dependent fits to the EMC effect and suggest that the nuclear dependence of the quark distributions may depend on the local nuclear environment.
Seely
J
J
Laboratory for Nuclear Science, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA.
Daniel
A
A
Gaskell
D
D
Arrington
J
J
Fomin
N
N
Solvignon
P
P
Asaturyan
R
R
Benmokhtar
F
F
Boeglin
W
W
Boillat
B
B
Bosted
P
P
Bruell
A
A
Bukhari
M H S
MH
Christy
M E
ME
Clasie
B
B
Connell
S
S
Dalton
M M
MM
Day
D
D
Dunne
J
J
Dutta
D
D
El Fassi
L
L
Ent
R
R
Fenker
H
H
Filippone
B W
BW
Gao
H
H
Hill
C
C
Holt
R J
RJ
Horn
T
T
Hungerford
E
E
Jones
M K
MK
Jourdan
J
J
Kalantarians
N
N
Keppel
C E
CE
Kiselev
D
D
Kotulla
M
M
Lee
C
C
Lung
A F
AF
Malace
S
S
Meekins
D G
DG
Mertens
T
T
Mkrtchyan
H
H
Navasardyan
T
T
Niculescu
G
G
Niculescu
I
I
Nomura
H
H
Okayasu
Y
Y
Opper
A K
AK
Perdrisat
C
C
Potterveld
D H
DH
Punjabi
V
V
Qian
X
X
Reimer
P E
PE
Roche
J
J
Rodriguez
V M
VM
Rondon
O
O
Schulte
E
E
Segbefia
E
E
Slifer
K
K
Smith
G R
GR
Tadevosyan
V
V
Tajima
S
S
Tang
L
L
Testa
G
G
Trojer
R
R
Tvaskis
V
V
Vulcan
W F
WF
Wesselmann
F R
FR
Wood
S A
SA
Wright
J
J
Yuan
L
L
Zheng
X
X