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

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M008W

Only experiments giving width error less than 20 MeV are kept for averaging.

VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT $\bf{ 23.0 \pm1.1}$ OUR AVERAGE  Error includes scale factor of 1.6.  See the ideogram below. $28.2$ $\pm1.1$ ${}^{+5.5}_{-2.9}$ 126K ABLIKIM 02 M   BES3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ ${{\mathit \pi}^{0}}$ $18.4$ $\pm1.4$ DICKSON 01   CLAS 2.55 ${{\mathit \gamma}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit p}}$ $18.3$ $\pm6.3$ 87 ABLIKIM 01 P   BES3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$3 ${{\mathit \pi}}$ $22.0$ $\pm3.1$ ${}^{+2.0}_{-1.5}$ 1 ABLIKIM 01 J   BES3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \omega}}({{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$) $35$ $\pm6$ $\pm4$ AUBERT 00 AU   BABR 10.6 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit f}_{{{1}}}{(1285)}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \gamma}}$ $40.0$ $\pm8.6$ $\pm9.3$ 203 BAI 00 J   BES2 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ $29$ $\pm12$ 237 ABDALLAH 00 H   DLPH 91.2 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}^{\pm}}{{\mathit \pi}^{\mp}}{+}$ ${{\mathit X}}$ $45$ $\pm9$ $\pm7$ 20k ADAMS 00 B   B852 18 GeV ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}{{\mathit n}}$ $55$ $\pm18$ 1400 ALDE 99 B   GAM4 100 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit n}}$ $24$ $\pm3$ BARBERIS 99 B   OMEG 450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}$2( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$) $20$ $\pm2$ BARBERIS 99 C   OMEG 450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}{{\mathit K}_S^0}$ ${{\mathit K}^{\pm}}{{\mathit \pi}^{\mp}}$ $36$ $\pm5$ 2 ANTINORI 99   OMEG 300,450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}$2( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$) $29.0$ $\pm4.1$ LEE 99   MPS2 18 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\overline{\mathit K}}^{0}}$2 ${{\mathit \pi}^{-}}{{\mathit p}}$ $25$ $\pm4$ $140$ ARMSTRONG 98   OMEG 300 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}{{\mathit p}}{{\mathit p}}$ $22$ $\pm2$ $4750$ 3 BIRMAN 98   MPS 8 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\overline{\mathit K}}^{0}}{{\mathit \pi}^{-}}{{\mathit n}}$ $25$ $\pm4$ $504$ BITYUKOV 98   SPEC 32.5 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}{{\mathit n}}$ $19$ $\pm5$ ANDO 98   SPEC 8 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit n}}$ $32$ $\pm8$ 420 REEVES 98   SPEC 6.6 ${{\mathit p}}$ ${{\overline{\mathit p}}}$ $\rightarrow$ ${{\mathit K}}{{\mathit K}}{{\mathit \pi}}$ X $22$ $\pm2$ CHUNG 98   SPEC 8 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit N}}{{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}$ $32$ $\pm3$ 604 ARMSTRONG 98   OMEG 85 ${{\mathit \pi}^{+}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}{{\mathit \pi}}{{\mathit p}}$, ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}{{\mathit p}}{{\mathit p}}$ $24$ $\pm3$ CHAUVAT 98   SPEC ISR 31.5 ${{\mathit p}}{{\mathit p}}$ $29$ $\pm10$ 103 DIONISI 98   HBC 4 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}{{\mathit n}}$ $28.3$ $\pm6.7$ 320 NACASCH 97   HBC 0.7,0.76 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}}{{\overline{\mathit K}}}$3 ${{\mathit \pi}}$ • • We do not use the following data for averages, fits, limits, etc. • • $17.1$ $\pm3.4$ 234 ABLIKIM 01 BA   BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \psi}{(2S)}}$ $32.4$ $\pm5.8$ 4 AAIJ 01 Y   LHCB ${{\overline{\mathit B}}_{{{}(s)}}}^{0}} \rightarrow {{\mathit J / \psi}}2 ( {{\mathit \pi}^{+}} {{\mathit \pi}^{-}}) $18.2$ $\pm1.2$ 4 SOSA 99   SPEC ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}_{{\mathrm {slow}}}$ (${{\mathit K}_S^0}$ ${{\mathit K}^{+}}{{\mathit \pi}^{-}}$) ${{\mathit p}}_{{\mathrm {fast}}}$ $19.4$ $\pm1.5$ 4 SOSA 99   SPEC ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}_{{\mathrm {slow}}}$ (${{\mathit K}_S^0}$ ${{\mathit K}^{-}}{{\mathit \pi}^{+}}$) ${{\mathit p}}_{{\mathrm {fast}}}$ $40$ $\pm5$ ABATZIS 99   OMEG 450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}$2( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$) $31$ $\pm5$ ARMSTRONG 98 E   OMEG 300 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}$2( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$) $41$ $\pm12$ ARMSTRONG 98 G   OMEG 85 ${{\mathit \pi}^{+}}$ ${{\mathit p}}$ $\rightarrow$ 4 ${{\mathit \pi}}{{\mathit \pi}}{{\mathit p}}$, ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ 4 ${{\mathit \pi}}{{\mathit p}}{{\mathit p}}$ $17.9$ $\pm10.9$ $60$ RATH 98   MPS 21.4 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ ${{\mathit \pi}^{0}}{{\mathit n}}$ $14$ ${}^{+20}_{-14}$ $\pm10$ $16$ BECKER 98   MRK3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \phi}}{{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}$ $26$ $\pm12$ EVANGELISTA 98   OMEG 12 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{-}}{{\mathit p}}$ $25$ $\pm15$ 200 GURTU 97   HBC 4.2 ${{\mathit K}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit n}}{{\mathit \eta}}$2 ${{\mathit \pi}}$ $\sim$$10$ 5 STANTON 97   CNTR 8.5 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit n}}$2 ${{\mathit \gamma}}$2 ${{\mathit \pi}}$ $24$ $\pm18$ 210 GRASSLER 97   HBC 16 ${{\mathit \pi}^{\mp}}{{\mathit p}}$ $28$ $\pm5$ 150 6 DEFOIX 97   HBC 0.7 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ 7 ${{\mathit \pi}}$ $46$ $\pm9$ 180 6 DUBOC 97   HBC 1.2 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ 2 ${{\mathit K}}$4 ${{\mathit \pi}}$ $37$ $\pm5$ 500 7 THUN 97   MMS 13.4 ${{\mathit \pi}^{-}}{{\mathit p}}$ $10$ $\pm10$ BOESEBECK 97   HBC 16.0 ${{\mathit \pi}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}$5 ${{\mathit \pi}}$ $30$ $\pm15$ CAMPBELL 96   DBC 2.7 ${{\mathit \pi}^{+}}{{\mathit d}}$ $60$ $\pm15$ 6 LORSTAD 96   HBC 0.7 ${{\overline{\mathit p}}}{{\mathit p}}$, 4,5-body $35$ $\pm10$ 6 DAHL 96   HBC 1.6$-$4.2 ${{\mathit \pi}^{-}}{{\mathit p}}$ 1  The selected process is ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \omega}}{{\mathit a}_{{{0}}}{(980)}}{{\mathit \pi}}$. 2  Supersedes ABATZIS 1994, ARMSTRONG 1989E. 3  From partial wave analysis of ${{\mathit K}^{+}}{{\overline{\mathit K}}^{0}}{{\mathit \pi}^{-}}$ system. 4  No systematic error given. 5  From phase shift analysis of ${{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ system. 6  Resolution is not unfolded. 7  Seen in the missing mass spectrum.

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

References