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${{\mathit \rho}{(1700)}}$ MASS

2 ( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ ) MODE

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M065M4

M065M4 VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT • • We do not use the following data for averages, fits, limits, etc. • • $1663$ $\pm13$ $\pm22$ 1 ACHARYA 2026   ALCE 5 TeV ${}^{}\mathrm {Pb}$ ${}^{}\mathrm {Pb}$ $\rightarrow$ ${}^{}\mathrm {Pb}$ ${}^{}\mathrm {Pb}$ 4 ${{\mathit \pi}}$ $1851$ ${}^{+27}_{-24}$ ACHASOV 1997   RVUE ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ 2(${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$) $1570$ $\pm20$ 2 CORDIER 1982   DM1 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ 2( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$) $1520$ $\pm30$ 3 ASTON 1981 E   OMEG 20$-$70 ${{\mathit \gamma}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}$4 ${{\mathit \pi}}$ $1654$ $\pm25$ 4 DIBIANCA 1981   DBC ${{\mathit \pi}^{+}}$ ${{\mathit d}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}$2( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$) $1666$ $\pm39$ 2 BACCI 1980   FRAG ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ 2( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$) $1780$ 34 KILLIAN 1980   SPEC 11 ${{\mathit e}^{-}}$ ${{\mathit p}}$ $\rightarrow$ 2( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$) $1500$ 5 ATIYA 1979 B   SPEC 50 ${{\mathit \gamma}}$ ${}^{}\mathrm {C}$ $\rightarrow$ ${}^{}\mathrm {C}$ 4 ${{\mathit \pi}^{\pm}}$ $1570$ $\pm60$ 65 6 ALEXANDER 1975   HBC 7.5 ${{\mathit \gamma}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}$4 ${{\mathit \pi}}$ $1550$ $\pm60$ 3 CONVERSI 1974   OSPK ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ 2( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$) $1550$ $\pm50$ 160 SCHACHT 1974   STRC 5.5$-$9 ${{\mathit \gamma}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}$4 ${{\mathit \pi}}$ $1450$ $\pm100$ 340 SCHACHT 1974   STRC 9$-$18 ${{\mathit \gamma}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}$4 ${{\mathit \pi}}$ $1430$ $\pm50$ 400 BINGHAM 1972 B   HBC 9.3 ${{\mathit \gamma}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}$4 ${{\mathit \pi}}$ 1  From a two Breit-Wigner resonance fit to the 4${{\mathit \pi}}$ mass distribution produced in ultraperipheral ${}^{}\mathrm {Pb}−{}^{}\mathrm {Pb}$ collisions. 2  Simple relativistic Breit-Wigner fit with model dependent width. 3  Simple relativistic Breit-Wigner fit with constant width. 4  One peak fit result. 5  Parameters roughly estimated, not from a fit. 6  Skew mass distribution compensated by Ross-Stodolsky factor.

References

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