First measurement of form factors of the decay Xi(0) --> Sigma(+)e(-)nu macro(e).
We present the first measurement of the form factor ratios g(1)/f(1) (direct axial vector to vector), g(2)/f(1) (second class current), and f(2)/f(1) (weak magnetism) for the decay Xi(0)-->Sigma(+)e(-)nu macro(e) using the KTeV (E799) beam line and detector at Fermilab. From the Sigma(+) polarization measured with the decay Sigma(+)-->p pi(0) and the e(-)-nu; correlation, we measure g(1)/f(1) to be 1.32+/-(0.21)(0.17)(stat)+/-0.05(syst), assuming the SU(3)(f) (flavor) values for g(2)/f(1) and f(2)/f(1). Our results are all consistent with exact SU(3)(f) symmetry.
Alavi-Harati
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A
University of Wisconsin, Madison, Wisconsin 53706, USA.
Alexopoulos
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T
Arenton
M
M
Arisaka
K
K
Averitte
S
S
Barbosa
R F
RF
Barker
A R
AR
Barrio
M
M
Bellantoni
L
L
Bellavance
A
A
Belz
J
J
Ben-David
R
R
Bergman
D R
DR
Blucher
E
E
Bock
G J
GJ
Bown
C
C
Bright
S
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Cheu
E
E
Childress
S
S
Coleman
R
R
Corcoran
M D
MD
Corti
G
G
Cox
B
B
Crisler
M B
MB
Erwin
A R
AR
Ford
R
R
Glazov
A
A
Golossanov
A
A
Graham
G
G
Graham
J
J
Hagan
K
K
Halkiadakis
E
E
Hamm
J
J
Hanagaki
K
K
Hidaka
S
S
Hsiung
Y B
YB
Jejer
V
V
Jensen
D A
DA
Kessler
R
R
Kobrak
H G
HG
LaDue
J
J
Lath
A
A
Ledovskoy
A
A
McBride
P L
PL
Mikelsons
P
P
Monnier
E
E
Nakaya
T
T
Nelson
K S
KS
Nguyen
H
H
O'Dell
V
V
Pang
M
M
Pordes
R
R
Prasad
V
V
Qi
X R
XR
Quinn
B
B
Ramberg
E J
EJ
Ray
R E
RE
Roodman
A
A
Sadamoto
M
M
Schnetzer
S
S
Senyo
K
K
Shanahan
P
P
Shawhan
P S
PS
Shields
J
J
Slater
W
W
Solomey
N
N
Somalwar
S V
SV
Stone
R L
RL
Swallow
E C
EC
Taegar
S A
SA
Tesarek
R J
RJ
Thomson
G B
GB
Toale
P A
PA
Tripathi
A
A
Tschirhart
R
R
Turner
S E
SE
Wah
Y W
YW
Wang
J
J
White
H B
HB
Whitmore
J
J
Winstein
B
B
Winston
R
R
Yamanaka
T
T
Zimmerman
E D
ED