Charge symmetry breaking in np-->dpi(0).
The forward-backward asymmetry in np-->dpi(0), which must be zero in the center-of-mass system if charge symmetry is respected, has been measured to be [17.2+/-8.0(stat)+/-5.5(syst)]x10(-4), at an incident neutron energy of 279.5 MeV. This observable is compared to recent chiral effective field theory calculations, with implications regarding the du quark mass difference.
Opper
A K
AK
Ohio University, Athens, Ohio 45701, USA. opper@ohiou.edu
Korkmaz
E
E
Hutcheon
D A
DA
Abegg
R
R
Davis
C A
CA
Finlay
R W
RW
Green
P W
PW
Greeniaus
L G
LG
Jordan
D V
DV
Niskanen
J A
JA
O'Rielly
G V
GV
Porcelli
T A
TA
Reitzner
S D
SD
Walden
P L
PL
Yen
S
S