# ${{\boldsymbol a}_{{1}}{(1640)}}$ WIDTH INSPIRE search

VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 254 \pm40}$ OUR AVERAGE  Error includes scale factor of 1.8.
$510$ ${}^{+170}_{-90}$ 46M 1
 2018 B
COMP 190 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit p}}$
$171$ $\pm33$ $\pm40$
 2017
RVUE ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{+}}$
$225$ $\pm30$ 35k 2
 2003
SPEC ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \omega}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$
$308$ $\pm37$ $\pm62$
 2002
B852 18.3 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{-}}{{\mathit p}}$
$300$ $\pm22$ $\pm40$
 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. • • •
$300$ $\pm100$
 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:
 AGHASYAN 2018B
PR D98 092003 Light isovector resonances in $\pi^- p \to \pi^-\pi^-\pi^+ p$ at 190 GeV/${\it c}$
 DARGENT 2017
JHEP 1705 143 Amplitude Analyses of ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ and ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ Decays
 BAKER 2003
PL B563 140 Confirmation of ${{\mathit a}_{{0}}{(1450)}}$ and ${{\mathit \pi}_{{1}}{(1600)}}$ in ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \omega}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ at Rest
 CHUNG 2002
PR D65 072001 Exotic and ${\mathit {\mathit q}}{\mathit {\overline{\mathit q}}}$ Resonances in the ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{-}}$ System Produced in ${{\mathit \pi}^{-}}{{\mathit p}}$ Collisions at 18-GeV/$\mathit c$
 BAKER 1999
PL B449 114 Evidence for a $\mathit J{}^{PC} = 1{}^{++}$ $\mathit I = 1$ Meson at 1640 MeV
 BELLINI 1985
SJNP 41 781 $2{}^{-}{}^{}$ Resonances in the ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{-}}$ Systems