${{\mathit \pi}_{{{2}}}{(1670)}}$ WIDTH

INSPIRE   PDGID:
M034W
VALUE (MeV) EVTS DOCUMENT ID TECN CHG  COMMENT
$\bf{ 258 {}^{+8}_{-9}}$ OUR AVERAGE  Error includes scale factor of 1.2.
$311$ ${}^{+12}_{-23}$ 46M 1
AGHASYAN
2018B
 COMP 190 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit p}}$
$408$ $\pm60$ $\pm250$ 145k
LU
2005
B852 18 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \omega}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}{{\mathit p}}$
$254$ $\pm3$ $\pm31$ 2
CHUNG
2002
B852 18.3 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{-}}{{\mathit p}}$
$265$ $\pm30$ $\pm40$
BARBERIS
2001
450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}_{{{f}}}}$3 ${{\mathit \pi}^{0}}{{\mathit p}_{{{s}}}}$
$168$ $\pm43$ $\pm53$
AMELIN
1999
VES 37 ${{\mathit \pi}^{-}}$ ${{\mathit A}}$ $\rightarrow$ ${{\mathit \omega}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}{{\mathit A}^{*}}$
$268$ $\pm15$
BARBERIS
1998B
 450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}_{{{f}}}}{{\mathit \rho}}$ ${{\mathit \pi}}{{\mathit p}_{{{s}}}}$
$256$ $\pm15$
BARBERIS
1998B
 450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}_{{{f}}}}{{\mathit f}_{{{2}}}{(1270)}}{{\mathit \pi}}$ ${{\mathit p}_{{{s}}}}$
$190$ $\pm50$ 3
BERDNIKOV
1994
VES 37 ${{\mathit \pi}^{-}}$ ${{\mathit A}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{-}}{{\mathit A}}$
$170$ $\pm80$ 700
ANTIPOV
1987
SIGM - 50 ${{\mathit \pi}^{-}}$ ${}^{}\mathrm {Cu}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}{{\mathit \pi}^{-}}{}^{}\mathrm {Cu}$
$260$ $\pm20$ 3
EVANGELISTA
1981
OMEG - 12 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ 3 ${{\mathit \pi}}{{\mathit p}}$
$219$ $\pm20$ 4, 3
DAUM
1980D
 SPEC - 63$-$94 ${{\mathit \pi}}$ ${{\mathit p}}$ $\rightarrow$ 3 ${{\mathit \pi}}$ X
$285$ $\pm60$ 2000 3
BALTAY
1977
HBC + 15 ${{\mathit \pi}^{+}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}$3 ${{\mathit \pi}}$
• • We do not use the following data for averages, fits, limits, etc. • •
$271$ $\pm9$ ${}^{+22}_{-24}$ 420k 5
ALEKSEEV
2010
COMP 190 ${{\mathit \pi}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit P}}{{\mathit b}^{\,'}}$
$310$ $\pm20$ 6
AMELIN
1995B
 VES 36 ${{\mathit \pi}^{-}}$ ${{\mathit A}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{-}}{{\mathit A}}$
$236$ $\pm49$ $\pm36$
ANTREASYAN
1990
CBAL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$
$304$ $\pm22$ 2
BELLINI
1985
SPEC 40 ${{\mathit \pi}^{-}}$ ${{\mathit A}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit A}}$
$404$ $\pm108$ 7
BELLINI
1985
SPEC 40 ${{\mathit \pi}^{-}}$ ${{\mathit A}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit A}}$
$330$ $\pm90$ 8
BELLINI
1985
SPEC 40 ${{\mathit \pi}^{-}}$ ${{\mathit A}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit A}}$
$312$ $\pm50$ 9
DAUM
1981B
 SPEC - 63,94 ${{\mathit \pi}^{-}}{{\mathit p}}$
$270$ $\pm60$ 3
ASCOLI
1973
HBC - 5$-$25 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit \pi}_{{{2}}}}$
1  Statistical error negligible.
2  From ${{\mathit f}_{{{2}}}{(1270)}}{{\mathit \pi}}$ decay.
3  From a fit to $\mathit J{}^{P} = 2{}^{-}{{\mathit f}_{{{2}}}{(1270)}}{{\mathit \pi}}$ partial wave.
4  Clear phase rotation seen in 2${}^{–}\mathit S$, 2${}^{–}\mathit P$, 2${}^{–}\mathit D$ waves. We quote central value and spread of single-resonance fits to three channels.
5  Superseded by AGHASYAN 2018B.
6  $\mathit J{}^{PC}$ ambiguous.
7  From ${{\mathit \rho}}{{\mathit \pi}}$ decay.
8  From ${{\mathit \sigma}}{{\mathit \pi}}$ decay.
9  From a two-resonance fit to four 2${}^{–}0{}^{+}$ waves. This should not be averaged with all the single resonance fits.
References