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

INSPIRE   JSON  (beta) PDGID:
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
2023M
 BES3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ ${{\mathit \pi}^{0}}$
$18.4$ $\pm1.4$
DICKSON
2016
CLAS 2.55 ${{\mathit \gamma}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit p}}$
$18.3$ $\pm6.3$ 87
ABLIKIM
2015P
 BES3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$3 ${{\mathit \pi}}$
$22.0$ $\pm3.1$ ${}^{+2.0}_{-1.5}$ 1
ABLIKIM
2011J
 BES3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \omega}}({{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$)
$35$ $\pm6$ $\pm4$
AUBERT
2007AU
 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
2004J
 BES2 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
$29$ $\pm12$ 237
ABDALLAH
2003H
 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
2001B
 B852 18 GeV ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}{{\mathit n}}$
$55$ $\pm18$ 1400
ALDE
1997B
 GAM4 100 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit n}}$
$24$ $\pm3$
BARBERIS
1997B
 OMEG 450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}$2( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$)
$20$ $\pm2$
BARBERIS
1997C
 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
1995
OMEG 300,450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}$2( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$)
$29.0$ $\pm4.1$
LEE
1994
MPS2 18 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\overline{\mathit K}}^{0}}$2 ${{\mathit \pi}^{-}}{{\mathit p}}$
$25$ $\pm4$ $140$
ARMSTRONG
1989
OMEG 300 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}{{\mathit p}}{{\mathit p}}$
$22$ $\pm2$ $4750$ 3
BIRMAN
1988
MPS 8 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\overline{\mathit K}}^{0}}{{\mathit \pi}^{-}}{{\mathit n}}$
$25$ $\pm4$ $504$
BITYUKOV
1988
SPEC 32.5 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}{{\mathit n}}$
$19$ $\pm5$
ANDO
1986
SPEC 8 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit n}}$
$32$ $\pm8$ 420
REEVES
1986
SPEC 6.6 ${{\mathit p}}$ ${{\overline{\mathit p}}}$ $\rightarrow$ ${{\mathit K}}{{\mathit K}}{{\mathit \pi}}$ X
$22$ $\pm2$
CHUNG
1985
SPEC 8 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit N}}{{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}$
$32$ $\pm3$ 604
ARMSTRONG
1984
OMEG 85 ${{\mathit \pi}^{+}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}{{\mathit \pi}}{{\mathit p}}$, ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}{{\mathit p}}{{\mathit p}}$
$24$ $\pm3$
CHAUVAT
1984
SPEC ISR 31.5 ${{\mathit p}}{{\mathit p}}$
$29$ $\pm10$ 103
DIONISI
1980
HBC 4 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}{{\mathit n}}$
$28.3$ $\pm6.7$ 320
NACASCH
1978
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
2019BA
 BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \psi}{(2S)}}$
$32.4$ $\pm5.8$ 4
AAIJ
2014Y
 LHCB ${{\overline{\mathit B}}_{{{}(s)}}}^{0}} \rightarrow {{\mathit J / \psi}}2 ( {{\mathit \pi}^{+}} {{\mathit \pi}^{-}})
$18.2$ $\pm1.2$ 4
SOSA
1999
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
1999
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
1994
OMEG 450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}$2( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$)
$31$ $\pm5$
ARMSTRONG
1989E
 OMEG 300 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}$2( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$)
$41$ $\pm12$
ARMSTRONG
1989G
 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
1989
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
1987
MRK3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \phi}}{{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}$
$26$ $\pm12$
EVANGELISTA
1981
OMEG 12 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{-}}{{\mathit p}}$
$25$ $\pm15$ 200
GURTU
1979
HBC 4.2 ${{\mathit K}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit n}}{{\mathit \eta}}$2 ${{\mathit \pi}}$
$\sim$$10$ 5
STANTON
1979
CNTR 8.5 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit n}}$2 ${{\mathit \gamma}}$2 ${{\mathit \pi}}$
$24$ $\pm18$ 210
GRASSLER
1977
HBC 16 ${{\mathit \pi}^{\mp}}{{\mathit p}}$
$28$ $\pm5$ 150 6
DEFOIX
1972
HBC 0.7 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ 7 ${{\mathit \pi}}$
$46$ $\pm9$ 180 6
DUBOC
1972
HBC 1.2 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ 2 ${{\mathit K}}$4 ${{\mathit \pi}}$
$37$ $\pm5$ 500 7
THUN
1972
MMS 13.4 ${{\mathit \pi}^{-}}{{\mathit p}}$
$10$ $\pm10$
BOESEBECK
1971
HBC 16.0 ${{\mathit \pi}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}$5 ${{\mathit \pi}}$
$30$ $\pm15$
CAMPBELL
1969
DBC 2.7 ${{\mathit \pi}^{+}}{{\mathit d}}$
$60$ $\pm15$ 6
LORSTAD
1969
HBC 0.7 ${{\overline{\mathit p}}}{{\mathit p}}$, 4,5-body
$35$ $\pm10$ 6
DAHL
1967
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