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${{\mathit \eta}}{{\mathit \pi}}$ MODE

INSPIRE   PDGID:

M012M3

VALUE (MeV) EVTS DOCUMENT ID TECN CHG  COMMENT $\bf{ 1317.7 \pm1.4}$ OUR AVERAGE $1308$ $\pm9$ BARBERIS 2000 H 450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}_{{f}}}{{\mathit \eta}}{{\mathit \pi}^{0}}{{\mathit p}_{{s}}}$ $1316$ $\pm9$ BARBERIS 2000 H 450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \Delta}_{{f}}^{++}}{{\mathit \eta}}{{\mathit \pi}^{-}}{{\mathit p}_{{s}}}$ $1317$ $\pm1$ $\pm2$ THOMPSON 1997 MPS 18 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{-}}{{\mathit p}}$ $1315$ $\pm5$ $\pm2$ 1 AMSLER 1994 D CBAR $0.0$ ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \eta}}$ $1325.1$ $\pm5.1$ AOYAGI 1993 BKEI ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{-}}{{\mathit p}}$ $1317.7$ $\pm1.4$ $\pm2.0$ BELADIDZE 1993 VES 37 ${{\mathit \pi}^{-}}$ ${{\mathit N}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{-}}{{\mathit N}}$ $1323$ $\pm8$ 1000 2 KEY 1973 OSPK - 6 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit \pi}^{-}}{{\mathit \eta}}$ • • We do not use the following data for averages, fits, limits, etc. • • $1307$ $\pm1$ $\pm6$ 3 JACKURA 2018 RVUE ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{-}}{{\mathit p}}$ $1315$ $\pm12$ 4 ADOLPH 2015 COMP 191 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}^{(')}}{{\mathit \pi}^{-}}{{\mathit p}}$ $1324$ $\pm5$ ARMSTRONG 1993 C E760 0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \eta}}{{\mathit \eta}}$ $\rightarrow$ 6 ${{\mathit \gamma}}$ $1336.2$ $\pm1.7$ 2561 DELFOSSE 1981 SPEC + ${{\mathit \pi}^{\pm}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit \pi}^{\pm}}{{\mathit \eta}}$ $1330.7$ $\pm2.4$ 1653 DELFOSSE 1981 SPEC - ${{\mathit \pi}^{\pm}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit \pi}^{\pm}}{{\mathit \eta}}$ $1324$ $\pm8$ 6200 2, 5 CONFORTO 1973 OSPK - 6 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}$ MM${}^{-}$ 1  The systematic error of 2 MeV corresponds to the spread of solutions. 2  Error includes 5 MeV systematic mass-scale error. 3  Superseded by RODAS 2019 . 4  ADOLPH 2015 value is derived from a Breit-Wigner fit with mass-dependent width taking the ${{\mathit \eta}}{{\mathit \pi}}$ and ${{\mathit \rho}}{{\mathit \pi}}$ channels into account. 5  Missing mass with enriched MMS = ${{\mathit \eta}}{{\mathit \pi}^{-}}$ , ${{\mathit \eta}}$ = 2${{\mathit \gamma}}$.

References:

JACKURA 2018 PL B779 464 New analysis of $\eta\pi$ tensor resonances measured at the COMPASS experiment ADOLPH 2015 PL B740 303 Odd and Even Partial Waves of ${{\mathit \eta}}{{\mathit \pi}^{-}}$ and ${{\mathit \eta}^{\,'}}{{\mathit \pi}^{-}}$ in ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}^{{(')}}}{{\mathit \pi}^{-}}{{\mathit p}}$ at 191 GeV/$\mathit c$ BARBERIS 2000H PL B488 225 A Study of the Centrally Produced ${{\mathit \eta}}{{\mathit \pi}^{0}}$ and ${{\mathit \eta}}{{\mathit \pi}^{-}}$ Systems in ${{\mathit p}}{{\mathit p}}$ Interactions at 450 ${\mathrm {GeV/}}\mathit c$ THOMPSON 1997 PRL 79 1630 Evidence for Exotic Meson Production in the Reaction ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{-}}{{\mathit p}}$ at 18 ${\mathrm {GeV/}}\mathit c$ AMSLER 1994D PL B333 277 Observation of a New $\mathit I{}^{G}(\mathit J{}^{PC}) = 1{}^{-}(0{}^{++})$ Resonance at 1450 MeV AOYAGI 1993 PL B314 246 Study of the ${{\mathit \eta}}{{\mathit \pi}^{-}}$ System in the ${{\mathit \pi}^{-}}{{\mathit p}}$ Reaction at 6.3 ${\mathrm {GeV/}}\mathit c$ ARMSTRONG 1993C PL B307 394 Evidence for ${{\mathit \eta}}{{\mathit \eta}}$ Resonances in Antiproton Proton Annihilations at 2950 $<$ $\sqrt {s }$ $<$ 3620 MeV BELADIDZE 1993 PL B313 276 Study of ${{\mathit \pi}^{-}}$ ${{\mathit N}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{-}}{{\mathit N}}$ and ${{\mathit \pi}^{-}}$ ${{\mathit N}}$ $\rightarrow$ ${{\mathit \eta}^{\,'}}{{\mathit \pi}^{-}}{{\mathit N}}$ Reactions at 37 ${\mathrm {GeV/}}\mathit c$ DELFOSSE 1981 NP B183 349 Production of ${{\mathit \rho}^{\pm}}$, ${{\mathit g}{(1700)}^{\pm}}$, ${{\mathit A}_{{2}}^{\pm}}$, ${{\mathit K}^{*}{(890)}^{\pm}}$ and ${{\mathit K}^{*}{(1420)}^{\pm}}$ at 50 ${\mathrm {GeV/}}\mathit c$ CONFORTO 1973 PL 45B 154 Missing Mass Analysis of the ${{\mathit A}_{{2}}^{-}}$ at 6.0 ${\mathrm {GeV/}}\mathit c$ KEY 1973 PRL 30 503 Study of the Decay ${{\mathit A}_{{2}}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}}$ via the Reaction ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{-}}{{\mathit p}}$ at 6.0 ${\mathrm {GeV/}}\mathit c$