Study of the K(0)(L) --> pi(+)pi(-)gamma Direct Emission Vertex.
We have performed studies of the K(0)(L)-->pi(+)pi(-)gamma direct emission ( DE) and inner Bremsstrahlung ( IB) vertices, based on data collected by KTeV during the 1996 Fermilab fixed target run. We find a(1)/a(2) = -0.737+/-0.034 GeV2 for the DE form-factor parameter in the rho-propagator parametrization, and report on fits of the form factor to linear and quadratic functions as well. We concurrently measure gamma(K(0)(L)-->pi(+)pi(-)gamma,E(*)(gamma)>20 MeV)/gamma(K(0)(L)-->pi(+)pi(-)) = (20.8+/-0.3)x10(-3), and a K(0)(L)-->pi(+)pi(-)gamma DE/(DE+IB) branching ratio of 0.683+/-0.011.
Alavi-Harati
A
A
University of Wisconsin, Madison, 53706, USA.
Alexopoulos
T
T
Arenton
M
M
Arisaka
K
K
Averitte
S
S
Barker
A R
AR
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
S
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
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
Suzuki
I
I
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