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