Evidence for ρ(1270)
Collaboration
|
process
|
mass (MeV)
|
width (MeV)
|
Desy+Frascati (1979)
|
γ p
→
p e+ e-
|
1266±5
|
110±35
|
LAMP2 (1980)
|
π+ π-
π π
|
1180±40
|
375±98
|
Aston et al. (1980)
|
ω π0
|
≅1.25 GeV
|
≅0.3 GeV
|
LASS (1990)
|
K- p
→
π+ π- Λ
|
1266±14
|
166±35
|
LASS (1991)
|
K- p
→
π+ π- Λ
|
1302±26
|
140±45
|
LASS (1994)
|
K- p
→
π+ π- Λ
|
1290±25
|
120±55
|
Belozerova et al. (2002)
|
e+ e-
→
π+ π-
|
1.1-1.25 GeV
|
0.1-0.2 GeV
|
Yamauchi et al. (2008)
|
BABAR and SND data
|
≅1.25 GeV
|
-
|
Dubna (2008)
|
π+ π-
→
π+ π-
|
1258±11
|
261±18
|
|