${{\mathit a}_{{{2}}}{(1700)}}$ T-MATRIX POLE $\sqrt {\mathit s }$

INSPIRE   PDGID:
M162PP
Note that $\Gamma $ = $−$2 Im($\sqrt {s }$).
VALUE (MeV) DOCUMENT ID TECN  COMMENT
$\bf{ (1630 - 1780) − {\mit i} (60 - 250)}$ OUR ESTIMATE
$(1686 \pm22 {}^{+19}_{-7}) − {\mit i} (211 \pm38 {}^{+32}_{-29})$ 1
KOPF
2021
RVUE 0.9 ${{\mathit p}}$ ${{\overline{\mathit p}}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \eta}}$, ${{\mathit \pi}^{0}}{{\mathit \eta}}{{\mathit \eta}}$, ${{\mathit \pi}^{0}}{{\mathit K}^{+}}{{\mathit K}^{-}}$ and 191 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit p}}$
$(1638.9 \pm2.3 {}^{+57.4}_{-0.1}) − {\mit i}(112.0 \pm1.3 {}^{+0.9}_{-24.2})$ 2
ALBRECHT
2020
RVUE 0.9 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \eta}}$ , ${{\mathit \pi}^{0}}{{\mathit \eta}}{{\mathit \eta}}$ , ${{\mathit \pi}^{0}}{{\mathit K}^{+}}{{\mathit K}^{-}}$
$(1722 \pm15 \pm67)−{\mit i}(124 \pm9 \pm32)$ 3
RODAS
2019
RVUE 191 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}^{\,'}}{{\mathit \pi}^{-}}{{\mathit p}}$
$(1698 \pm44) − {\mit i} (133 \pm28)$
AMSLER
2002
CBAR $0.9$ ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \eta}}{{\mathit \eta}}$
1  Based on combined fit of Crystal Barrel and ${{\mathit \pi}}{{\mathit \pi}}$ scattering data (ALBRECHT 2020), and COMPASS data (ADOLPH 2015), using a coupled-channel model of ${{\mathit \eta}}{{\mathit \pi}}$, ${{\mathit \eta}^{\,'}}{{\mathit \pi}}$ and ${{\mathit K}}{{\overline{\mathit K}}}$ systems.
2  Based on 2 poles, 2 channels (${{\mathit \pi}}{{\mathit \eta}}$, ${{\mathit K}}{{\overline{\mathit K}}}$).
3  The coupled-channel analysis of both the ${{\mathit \eta}}{{\mathit \pi}}$ and ${{\mathit \eta}^{\,'}}{{\mathit \pi}}$ systems using ADOLPH 2015 data.
References