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${{\mathit f}_{{{1}}}{(1285)}}$ MASS

INSPIRE   PDGID:

M008M

VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT $\bf{ 1281.8 \pm0.5}$ OUR AVERAGE  Error includes scale factor of 1.7.  See the ideogram below. $1280.2$ $\pm0.6$ ${}^{+1.2}_{-1.5}$ 126K ABLIKIM 2023 M BES3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ ${{\mathit \pi}^{0}}$ $1281.0$ $\pm0.8$ DICKSON 2016 CLAS 2.55 ${{\mathit \gamma}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit p}}$ $1287.4$ $\pm3.0$ 87 ABLIKIM 2015 P BES3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$3 ${{\mathit \pi}}$ $1281.16$ $\pm0.39$ $\pm0.45$ 1 LEES 2012 X BABR ${{\mathit \tau}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit f}_{{{1}}}{(1285)}}{{\mathit \nu}_{{{\tau}}}}$ $1285.1$ $\pm1.0$ ${}^{+1.6}_{-0.3}$ 2 ABLIKIM 2011 J BES3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \omega}}({{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$) $1281$ $\pm2$ $\pm1$ AUBERT 2007 AU BABR 10.6 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit f}_{{{1}}}{(1285)}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \gamma}}$ $1276.1$ $\pm8.1$ $\pm8.0$ 203 BAI 2004 J BES2 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ $1274$ $\pm6$ 237 ABDALLAH 2003 H DLPH 91.2 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}^{\pm}}{{\mathit \pi}^{\mp}}{+}$ ${{\mathit X}}$ $1280$ $\pm4$ ACCIARRI 2001 G L3 $1288$ $\pm4$ $\pm5$ 20k ADAMS 2001 B B852 18 GeV ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}{{\mathit n}}$ $1284$ $\pm6$ 1400 ALDE 1997 B GAM4 100 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit n}}$ $1281$ $\pm1$ BARBERIS 1997 B OMEG 450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}$2( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$) $1281$ $\pm1$ BARBERIS 1997 C OMEG 450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}{{\mathit K}_S^0}$ ${{\mathit K}^{\pm}}{{\mathit \pi}^{\mp}}$ $1280$ $\pm2$ 3 ANTINORI 1995 OMEG 300,450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}$2( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$) $1282.2$ $\pm1.5$ LEE 1994 MPS2 18 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\overline{\mathit K}}^{0}}$2 ${{\mathit \pi}^{-}}{{\mathit p}}$ $1279$ $\pm5$ FUKUI 1991 C SPEC 8.95 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit n}}$ $1278$ $\pm2$ $140$ ARMSTRONG 1989 OMEG 300 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}{{\mathit p}}{{\mathit p}}$ $1278$ $\pm2$ ARMSTRONG 1989 G OMEG 85 ${{\mathit \pi}^{+}}$ ${{\mathit p}}$ $\rightarrow$ 4 ${{\mathit \pi}}{{\mathit \pi}}{{\mathit p}}$, ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ 4 ${{\mathit \pi}}{{\mathit p}}{{\mathit p}}$ $1280.1$ $\pm2.1$ $60$ RATH 1989 MPS 21.4 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ ${{\mathit \pi}^{0}}{{\mathit n}}$ $1285$ $\pm1$ $4750$ 4 BIRMAN 1988 MPS 8 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\overline{\mathit K}}^{0}}{{\mathit \pi}^{-}}{{\mathit n}}$ $1280$ $\pm1$ $504$ BITYUKOV 1988 SPEC 32.5 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}{{\mathit n}}$ $1280$ $\pm4$ ANDO 1986 SPEC 8 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit n}}$ $1277$ $\pm2$ 420 REEVES 1986 SPEC 6.6 ${{\mathit p}}$ ${{\overline{\mathit p}}}$ $\rightarrow$ ${{\mathit K}}{{\mathit K}}{{\mathit \pi}}$ X $1285$ $\pm2$ CHUNG 1985 SPEC 8 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit N}}{{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}$ $1279$ $\pm2$ 604 ARMSTRONG 1984 OMEG 85 ${{\mathit \pi}^{+}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}{{\mathit \pi}}{{\mathit p}}$, ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}{{\mathit p}}{{\mathit p}}$ $1286$ $\pm1$ CHAUVAT 1984 SPEC ISR 31.5 ${{\mathit p}}{{\mathit p}}$ $1278$ $\pm4$ EVANGELISTA 1981 OMEG 12 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{-}}{{\mathit p}}$ $1283$ $\pm3$ 103 DIONISI 1980 HBC 4 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}{{\mathit n}}$ $1282$ $\pm2$ 320 NACASCH 1978 HBC 0.7,0.76 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}}{{\overline{\mathit K}}}$3 ${{\mathit \pi}}$ $1279$ $\pm5$ 210 GRASSLER 1977 HBC 16 ${{\mathit \pi}^{\mp}}{{\mathit p}}$ $1286$ $\pm3$ 180 DUBOC 1972 HBC 1.2 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ 2 ${{\mathit K}}$4 ${{\mathit \pi}}$ $1283$ $\pm5$ DAHL 1967 HBC 1.6$-$4.2 ${{\mathit \pi}^{-}}{{\mathit p}}$ • • We do not use the following data for averages, fits, limits, etc. • • $1289.3$ $\pm2.8$ 234 ABLIKIM 2019 BA BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \psi}{(2S)}}$ $1284.2$ $\pm2.2$ 5 AAIJ 2014 Y LHCB ${{\overline{\mathit B}}_{{{}(s)}}}^{0}} \rightarrow {{\mathit J / \psi}}2 ( {{\mathit \pi}^{+}} {{\mathit \pi}^{-}}) $1281.9$ $\pm0.5$ 5 SOSA 1999 SPEC ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}_{{\mathrm {slow}}}$ (${{\mathit K}_S^0}$ ${{\mathit K}^{+}}{{\mathit \pi}^{-}}$) ${{\mathit p}}_{{\mathrm {fast}}}$ $1282.8$ $\pm0.6$ 5 SOSA 1999 SPEC ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}_{{\mathrm {slow}}}$ (${{\mathit K}_S^0}$ ${{\mathit K}^{-}}{{\mathit \pi}^{+}}$) ${{\mathit p}}_{{\mathrm {fast}}}$ $1270$ $\pm10$ AMELIN 1995 VES 37 ${{\mathit \pi}^{-}}$ ${{\mathit N}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \gamma}}{{\mathit N}}$ $1280$ $\pm2$ ABATZIS 1994 OMEG 450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}$2( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$) $1282$ $\pm4$ ARMSTRONG 1993 C E760 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \eta}}{{\mathit \eta}}$ $\rightarrow$ 6 ${{\mathit \gamma}}$ $1270$ $\pm6$ $\pm10$ ARMSTRONG 1992 C OMEG 300 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \gamma}}$ $1281$ $\pm1$ ARMSTRONG 1989 E OMEG 300 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}$2( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$) $1279$ $\pm6$ $\pm10$ $16$ BECKER 1987 MRK3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \phi}}{{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}$ $1286$ $\pm9$ GIDAL 1987 MRK2 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ $1287$ $\pm5$ 353 BITYUKOV 1984 B SPEC 32 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}{{\mathit n}}$ $\sim{}\text{ 1279}$ 6 TORNQVIST 1982 B RVUE $1275$ $\pm6$ 31 BROMBERG 1980 SPEC 100 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}$ X $1288$ $\pm9$ 200 GURTU 1979 HBC 4.2 ${{\mathit K}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit n}}{{\mathit \eta}}$2 ${{\mathit \pi}}$ $\sim{}\text{ 1275.0}$ 46 7 STANTON 1979 CNTR 8.5 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit n}}$2 ${{\mathit \gamma}}$2 ${{\mathit \pi}}$ $1271$ $\pm10$ 34 CORDEN 1978 OMEG 12$-$15 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}}{{\mathit n}}$ $1295$ $\pm12$ 85 CORDEN 1978 OMEG 12$-$15 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit n}}$5 ${{\mathit \pi}}$ $1292$ $\pm10$ 150 DEFOIX 1972 HBC 0.7 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ 7 ${{\mathit \pi}}$ $1280$ $\pm3$ 500 8 THUN 1972 MMS 13.4 ${{\mathit \pi}^{-}}{{\mathit p}}$ $1303$ $\pm8$ BARDADIN-OTWI.. 1971 HBC 8 ${{\mathit \pi}^{+}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}$6 ${{\mathit \pi}}$ $1283$ $\pm6$ BOESEBECK 1971 HBC 16.0 ${{\mathit \pi}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}$5 ${{\mathit \pi}}$ $1270$ $\pm10$ CAMPBELL 1969 DBC 2.7 ${{\mathit \pi}^{+}}{{\mathit d}}$ $1285$ $\pm7$ LORSTAD 1969 HBC 0.7 ${{\overline{\mathit p}}}{{\mathit p}}$, 4,5-body $1290$ $\pm7$ D'ANDLAU 1968 HBC 1.2 ${{\overline{\mathit p}}}{{\mathit p}}$, 5$-$6 body 1  Using the 2 ${{\mathit \pi}^{+}}$2 ${{\mathit \pi}^{-}}$ and ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \eta}}$ modes of ${{\mathit f}_{{{1}}}{(1285)}}$ decay. 2  The selected process is ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \omega}}{{\mathit a}_{{{0}}}{(980)}}{{\mathit \pi}}$. 3  Supersedes ABATZIS 1994, ARMSTRONG 1989E. 4  From partial wave analysis of ${{\mathit K}^{+}}{{\overline{\mathit K}}^{0}}{{\mathit \pi}^{-}}$ system. 5  No systematic error given. 6  From a unitarized quark-model calculation. 7  From phase shift analysis of ${{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ system. 8  Seen in the missing mass spectrum.

${{\mathit f}_{{{1}}}{(1285)}}$ mass (MeV)

References