${{\mathit a}_{{2}}{(1320)}}$ T-MATRIX POLE $\sqrt {\mathit s }$

INSPIRE   PDGID:
M012PP
Note that $\Gamma \approx{}$2 Im($\sqrt {s }$).
VALUE (MeV) DOCUMENT ID TECN  COMMENT
$\bf{ (1305 - 1321)−{\mit i}(52 - 58)}$ OUR ESTIMATE
$(1318.7 \pm1.9 \pm1.3)−{\mit i}(53.8 \pm2.3 {}^{+1.7}_{-0.9})$ 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 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit p}}$
$(1312.5 \pm0.7 \pm2.6)−{\mit i}(53.5 \pm0.6 \pm1.9)$ 2
ALBRECHT
2020
RVUE 0.9 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \eta}}$ , ${{\mathit \pi}^{0}}{{\mathit \eta}}{{\mathit \eta}}$ , ${{\mathit \pi}^{0}}{{\mathit K}^{+}}{{\mathit K}^{-}}$
$(1306.0 \pm0.8 \pm1.3)−{\mit i}(57.2 \pm0.8 \pm0.0)$ 3
RODAS
2019
RVUE 91 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}^{(')}}{{\mathit \pi}^{-}}{{\mathit p}}$
$(1309 \pm4) − {\mit i} (55 \pm2)$ 4
ANISOVICH
2009
RVUE ${{\overline{\mathit p}}}{{\mathit p}}$ , ${{\mathit \pi}}{{\mathit N}}$
1  Extraction based on a 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  T-matrix pole with 2 poles, 2 channels ( ${{\mathit \pi}^{0}}{{\mathit \eta}}$ and ${{\mathit K}}{{\overline{\mathit K}}}$ ).
3  Coupled-channel analysis of both the ${{\mathit \eta}}{{\mathit \pi}}$ and ${{\mathit \eta}^{\,'}}{{\mathit \pi}}$ systems using ADOLPH 2015 data. Supersedes JACKURA 2018 . Performed by JPAC.
4  Amplitude did not include dispersive corrections. From analysis of ${{\mathit \eta}}{{\mathit \pi}}$ mode.
References:
KOPF 2021
EPJ C81 1056 Investigation of the lightest hybrid meson candidate with a coupled-channel analysis of ${{\bar{p}}p}$-, $\pi ^- p$- and ${\pi \pi }$-Data
ALBRECHT 2020
EPJ C80 453 Coupled channel analysis of ${\bar{p}p}\,\rightarrow \,\pi ^0\pi ^0\eta $, ${\pi ^0\eta \eta }$ and ${K^+K^-\pi ^0}$ at 900 MeV/c and of ${\pi \pi }$-scattering data
RODAS 2019
PRL 122 042002 Determination of the pole position of the lightest hybrid meson candidate
ANISOVICH 2009
IJMP A24 2481 The Combined Analysis of ${{\mathit \pi}}$ ${{\mathit N}}$ $\rightarrow$ two mesons ${+}$ ${{\mathit N}}$ Reactions within Reggeon Exchanges and Data for ${{\mathit p}}$ ${{\overline{\mathit p}}}$ (at rest) $\rightarrow$ three mesons