Search for the CP forbidden decay eta-->4pi(0)
We report the first determination of the upper limit for the branching ratio of the CP forbidden decay eta-->4pi(0). No events were observed in a sample of 3.0x10(7) eta decays. The experiment was performed with the Crystal Ball multiphoton spectrometer installed in a separated pi(-) beam at the AGS (Alternating Gradient Synchrotron). At the 90% confidence limit, B(eta-->4pi(0))</=6. 9x10(-7).
Prakhov
S
University of California, Los Angeles, Los Angeles, California 90095-1547, USA.
Tippens
WB
Allgower
C
Bekrenev
V
Berger
E
Briscoe
WJ
Clajus
M
Comfort
JR
Craig
K
Grosnick
D
Huber
GM
Isenhower
D
Knecht
N
Koetke
D
Koulbardis
A
Kozlenko
N
Kruglov
S
Kycia
T
Lolos
GJ
Lopatin
I
Manley
DM
Marusic
A
Manweiler
R
McDonald
S
Nefkens
BM
Olmsted
J