${{\mathit a}_{{{4}}}{(1970)}}$ WIDTH

INSPIRE   PDGID:
M017W
VALUE (MeV) EVTS DOCUMENT ID TECN CHG  COMMENT
$\bf{ 324 {}^{+15}_{-18}}$ OUR AVERAGE
$333$ ${}^{+16}_{-21}$ 46M 1
AGHASYAN
2018B
 COMP 190 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit p}}$
$300$ ${}^{+80}_{-100}$
ADOLPH
2015
COMP 191 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}^{(')}}{{\mathit \pi}^{-}}{{\mathit p}}$
$231$ $\pm30$ $\pm46$ 145k
LU
2005
B852 18 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \omega}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}{{\mathit p}}$
$298$ $\pm81$ $\pm85$
CHUNG
2002
B852 18.3 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ 3 ${{\mathit \pi}}{{\mathit p}}$
$350$ $\pm100$ ${}^{+70}_{-50}$
IVANOV
2001
B852 18 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}^{\,'}}{{\mathit \pi}^{-}}{{\mathit p}}$
$370$ $\pm80$ 2
ALDE
1996
GAM2 0 38 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{0}}{{\mathit n}}$
$380$ $\pm150$ 3
CLELAND
1982B
 SPEC $\pm{}$ 50 ${{\mathit \pi}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}^{\pm}}{{\mathit p}}$
• • We do not use the following data for averages, fits, limits, etc. • •
$294$ $\pm25$ ${}^{+46}_{-19}$ 420k 4
ALEKSEEV
2010
COMP 190 ${{\mathit \pi}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit P}}{{\mathit b}^{\,'}}$
$401$ $\pm16$ 80k 5
UMAN
2006
E835 5.2 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \eta}}{{\mathit \pi}^{0}}$
$180$ $\pm30$ 6
ANISOVICH
2001F
 SPEC 2.0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ 3 ${{\mathit \pi}^{0}}$, ${{\mathit \pi}^{0}}{{\mathit \eta}}$, ${{\mathit \pi}^{0}}{{\mathit \eta}^{\,'}}$
$324$ $\pm26$ $\pm75$ 7
AMELIN
1999
VES 37 ${{\mathit \pi}^{-}}$ ${{\mathit A}}$ $\rightarrow$ ${{\mathit \omega}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}{{\mathit A}^{*}}$
$166$ $\pm43$ 8
BALDI
1978
SPEC - 10 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit K}_S^0}$ ${{\mathit K}^{-}}$
$510$ $\pm200$ 9
CORDEN
1978C
 OMEG 0 15 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ 3 ${{\mathit \pi}}{{\mathit n}}$
1  Statistical error negligible.
2  From a simultaneous fit to the $\mathit G_{+}$ and $\mathit G_{0}$ wave intensities.
3  From an amplitude analysis.
4  Superseded by AGHASYAN 2018B.
5  Statistical error only.
6  From the combined analysis of ANISOVICH 1999C, ANISOVICH 1999E, and ANISOVICH 2001F.
7  May be a different state.
8  From a fit to the $\mathit Y{}^{0}_{8}$ moment. Limited by phase space.
9  $\mathit J{}^{P} = 4{}^{+}$ is favored, though $\mathit J{}^{P} = 2{}^{+}$ cannot be excluded.
References