${{\mathit a}_{{{1}}}{(1640)}}$ WIDTH

INSPIRE   PDGID:
M161W
VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 250 \pm40}$ OUR AVERAGE  Error includes scale factor of 1.8.  See the ideogram below.
$510$ ${}^{+170}_{-90}$ 46M 1
AGHASYAN
2018B
COMP 190 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit p}}$
$171$ $\pm33$ $\pm40$
DARGENT
2017
RVUE ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{+}}$
$225$ $\pm30$ 35k 2
BAKER
2003
SPEC ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \omega}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$
$308$ $\pm37$ $\pm62$
CHUNG
2002
B852 18.3 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{-}}{{\mathit p}}$
$300$ $\pm22$ $\pm40$
BAKER
1999
SPEC $1.94$ ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ 4 ${{\mathit \pi}^{0}}$
• • We do not use the following data for averages, fits, limits, etc. • •
$300$ $\pm100$
BELLINI
1985
SPEC 40 ${{\mathit \pi}^{-}}$ ${{\mathit A}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit A}}$
1  Statistical error negligible.
2  Using the ${{\mathit a}_{{{1}}}{(1260)}}$ mass and width results of BOWLER 1988.

           ${{\mathit a}_{{{1}}}{(1640)}}$ width (MeV)
References