High resolution spectroscopy of (lambda)(12)B by electroproduction.
An experiment measuring electroproduction of hypernuclei has been performed in hall A at Jefferson Lab on a 12C target. In order to increase counting rates and provide unambiguous kaon identification two superconducting septum magnets and a ring imaging Cherenkov detector were added to the hall A standard equipment. An unprecedented energy resolution of less than 700 keV FWHM has been achieved. Thus, the observed (Lambda)(12)B spectrum shows for the first time identifiable strength in the core-excited region between the ground-state s-wave Lambda peak and the 11 MeV p-wave Lambda peak.
Iodice
M
M
Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tre, I-00146 Roma, Italy.
Cusanno
F
F
Acha
A
A
Ambrozewicz
P
P
Aniol
K A
KA
Baturin
P
P
Bertin
P Y
PY
Benaoum
H
H
Blomqvist
K I
KI
Boeglin
W U
WU
Breuer
H
H
Brindza
P
P
Bydzovský
P
P
Camsonne
A
A
Chang
C C
CC
Chen
J-P
JP
Choi
Seonho
S
Chudakov
E A
EA
Cisbani
E
E
Colilli
S
S
Coman
L
L
Craver
B J
BJ
De Cataldo
G
G
de Jager
C W
CW
De Leo
R
R
Deur
A P
AP
Ferdi
C
C
Feuerbach
R J
RJ
Folts
E
E
Fratoni
R
R
Frullani
S
S
Garibaldi
F
F
Gayou
O
O
Giulani
F
F
Gomez
J
J
Gricia
M
M
Hansen
J O
JO
Hayes
D
D
Higinbotham
D W
DW
Holmstrom
T K
TK
Hyde
C E
CE
Ibrahim
H F
HF
Jiang
X
X
Kaufman
L J
LJ
Kino
K
K
Kross
B
B
Lagamba
L
L
LeRose
J J
JJ
Lindgren
R A
RA
Lucentini
M
M
Margaziotis
D J
DJ
Markowitz
P
P
Marrone
S
S
Meziani
Z E
ZE
McCormick
K
K
Michaels
R W
RW
Millener
D J
DJ
Miyoshi
T
T
Moffit
B
B
Monaghan
P A
PA
Moteabbed
M
M
Muñoz Camacho
C
C
Nanda
S
S
Nappi
E
E
Nelyubin
V V
VV
Norum
B E
BE
Okasyasu
Y
Y
Paschke
K D
KD
Perdrisat
C F
CF
Piasetzky
E
E
Punjabi
V A
VA
Qiang
Y
Y
Raue
B
B
Reimer
P E
PE
Reinhold
J
J
Reitz
B
B
Roche
R E
RE
Rodriguez
V M
VM
Saha
A
A
Santavenere
F
F
Sarty
A J
AJ
Segal
J
J
Shahinyan
A
A
Singh
J
J
Sirca
S
S
Snyder
R
R
Solvignon
P H
PH
Sotona
M
M
Subedi
R
R
Sulkosky
V A
VA
Suzuki
T
T
Ueno
H
H
Ulmer
P E
PE
Urciuoli
G M
GM
Veneroni
P
P
Voutier
E
E
Wojtsekhowski
B B
BB
Ye
Y
Y
Zheng
X
X
Zhou
S
S
Zorn
C
C