pdgLive

OBLX

$0.05 - 0.405$ ${{\overline{\mathit n}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$

• • We do not use the following data for averages, fits, limits, etc. • •

$107$ $\pm9$ ${}^{+21}_{-7}$

2022

BES3

${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \eta}^{\,'}}$

$124$ $\pm7$

AAIJ

2014

LHCB

${{\overline{\mathit B}}_{{s}}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$

$136$ ${}^{+41}_{-26}$ ${}^{+28}_{-100}$

5.5k

⁴

2013

BES3

${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \eta}}{{\mathit \eta}}$

$90$ ${}^{+2}_{-1}$ ${}^{+50}_{-22}$

⁵

UEHARA

2008

BELL

10.6 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$

$108$ ${}^{+14}_{-11}$ $\pm25$

BES2

${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$

$121$ $\pm8$

CBAR

0.9 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}$

$257$ $\pm33$

9.9k

AUBERT

BABR

${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{+}}{{\mathit K}^{-}}$

$108$ $\pm9$

80k

⁶ ^{, 7}

UMAN

E835

5.2 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \eta}}{{\mathit \pi}^{0}}$

$119$ $\pm10$

VLADIMIRSKY

SPEC

40 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ ${{\mathit n}}$

$90$ $\pm15$

GAMS

33 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \eta}}{{\mathit n}}$

$136$ $\pm23$

1400

⁸

GARMASH

BELL

${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{+}}{{\mathit K}^{-}}$

$140$ $\pm40$

2001

CBAR

$0.0$ ${{\overline{\mathit p}}}$ ${{\mathit d}}$ $\rightarrow$ ${{\mathit \pi}^{-}}$4 ${{\mathit \pi}^{0}}{{\mathit p}}$

$104$ $\pm25$

OMEG

450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}_{{s}}}{{\mathit p}_{{f}}}{{\mathit K}^{+}}{{\mathit K}^{-}}$

$131$ $\pm15$

OMEG

450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}_{{s}}}{{\mathit p}_{{f}}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$

$160$ $\pm50$

BELLAZZINI

GAM4

450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$

$100$ $\pm33$

FRENCH

300 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}_{{f}}}$( ${{\mathit K}^{+}}{{\mathit K}^{-}}$) ${{\mathit p}_{{s}}}$

$280$ $\pm100$

GAM4

100 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit n}}$

$\sim{}\text{ 100}$

FRABETTI

1997

E687

${{\mathit D}_{{s+-}}}$ $\rightarrow$ ${{\mathit \pi}^{\mp}}{{\mathit \pi}^{\pm}}{{\mathit \pi}^{\pm}}$

$\sim{}\text{ 169}$

CBAR

0.0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ 5 ${{\mathit \pi}^{0}}$

$100$ $\pm30$

120

AMELIN

VES

37 ${{\mathit \pi}^{-}}$ ${{\mathit A}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \eta}}{{\mathit \pi}^{-}}{{\mathit A}}$

$132$ $\pm15$

BUGG

RVUE

$120$ $\pm25$

⁹

CBAR

$0.0$ ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ 3 ${{\mathit \pi}^{0}}$

$120$ $\pm30$

¹⁰

CBAR

0.0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \eta}}{{\mathit \pi}^{0}}$

$65$ $\pm10$

¹¹

ANTINORI

OMEG

300,450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}$2( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$)

$199$ $\pm30$

ANTINORI

OMEG

300,450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$

$56$ $\pm12$

ABATZIS

1994

OMEG

450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}$2( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$)

$100$ $\pm40$

1994

CBAR

$0.0$ ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \eta}}{{\mathit \eta}^{\,'}}$

$245$ $\pm50$

1992

CBAR

0.0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \eta}}{{\mathit \eta}}$

$153$ $\pm67$ $\pm50$

BELADIDZE

1992

VES

36 ${{\mathit \pi}^{-}}$ ${}^{}\mathrm {Be}$ ${{\mathit \pi}^{-}}$ ${{\mathit \eta}^{\,'}}$ ${{\mathit \eta}}$ ${}^{}\mathrm {Be}$

$78$ $\pm18$

ARMSTRONG

1989

OMEG

300 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}$2( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$)

$170$ $\pm40$

1988

GAM4

300 ${{\mathit \pi}^{-}}$ ${{\mathit N}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit N}}$2 ${{\mathit \eta}}$

$150$ $\pm20$

600

1987

GAM4

100 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ 4 ${{\mathit \pi}^{0}}{{\mathit n}}$

$265$ $\pm65$

¹²

1986

GAM4

100 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ 2 ${{\mathit \eta}}{{\mathit n}}$

$260$ $\pm60$

1984

GAM2

38 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \eta}^{\,'}}{{\mathit n}}$

$210$ $\pm40$

GAM2

38 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ 2 ${{\mathit \eta}}{{\mathit n}}$

$101$ $\pm13$

GRAY

DBC

$0.0$ ${{\overline{\mathit p}}}$ ${{\mathit N}}$ $\rightarrow$ 3 ${{\mathit \pi}}$

¹	Breit-Wigner width.

²	The ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ mass spectrum is described by a coherent sum of two Breit-Wigner resonances, ${{\mathit f}_{{0}}{(1500)}}$ and a new ${{\mathit X}{(1540)}}$ with mass $1540.2$ $\pm7.0$ ${}^{+36.3}_{-6.1}$ MeV and width $157$ $\pm19$ ${}^{+11}_{-77}$ MeV.

³	Solution I, statistical error only.

⁴	From partial wave analysis including all possible combinations of 0${}^{++}$, 2${}^{++}$, and 4${}^{++}$ resonances.

⁵	Breit-Wigner width. May also be the ${{\mathit f}_{{0}}{(1370)}}$.

⁶	Breit-Wigner width.

⁷	Statistical error only.

⁸	Breit-Wigner, solution 1, PWA ambiguous.

⁹	T-matrix pole, supersedes ANISOVICH 1994 .

¹⁰	T-matrix pole, supersedes ANISOVICH 1994 and AMSLER 1992 .

¹¹	Supersedes ABATZIS 1994 , ARMSTRONG 1989E. Breit-Wigner mass.

¹²	From central value and spread of two solutions. Breit-Wigner mass.

References:

2022G

PRL 129 042001

Observation of a State $X(2600)$ in the $\pi^{+}\pi^{-}\eta'$ System in the Process $J/\psi\rightarrow\gamma\pi^{+}\pi^{-}\eta'$

AAIJ

2014BR

PR D89 092006

Measurement of Resonant and $\mathit CP$ Components in ${{\overline{\mathit B}}_{{s}}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ Decays

2013N

PR D87 092009

Partial Wave Analysis of ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \eta}}{{\mathit \eta}}$

UEHARA

2008A

PR D78 052004

High-Statistics Measurement of Neutral-Pion Pair Production in Two-Photon Collisions

2006V

PL B642 441

Partial Wave Analyses of ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ and ${{\mathit \gamma}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$

PL B639 165

Study of ${{\mathit K}}{{\overline{\mathit K}}}$ resonances in ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}$ at 900 and 1640 MeV/$\mathit c$

AUBERT

2006O

PR D74 032003

Dalitz Plot Analysis of the Decay ${{\mathit B}^{\pm}}$ $\rightarrow$ ${{\mathit K}^{\pm}}{{\mathit K}^{\pm}}{{\mathit K}^{\mp}}$

UMAN

PR D73 052009

Light Quark Resonances in ${{\overline{\mathit p}}}{{\mathit p}}$ Annihilations at 5.2 GeV/$\mathit c$

VLADIMIRSKY

PAN 69 493

Analysis of the ${{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ System from the Reaction ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ ${{\mathit n}}$ at 40 GeV

PAN 68 960

Investigation of the ${{\mathit \eta}}{{\mathit \eta}}$ System in ${{\mathit \pi}^{-}}{{\mathit p}}$ Interactions at a Momentum of 32.5 GeV/$\mathit c$ at the GAMS-4$\pi $ Spectrometer

GARMASH

PR D71 092003

Dalitz Analysis of the Three-Body Charmless Decays ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ and ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{+}}{{\mathit K}^{-}}$

2001

EPJ C19 667

Study of ${{\mathit f}_{{0}}}$ Decays into Four Neutral Pions

1999B

PL B453 316

A Partial Wave Analysis of the Centrally Produced ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ System in ${{\mathit p}}{{\mathit p}}$ Interactions at 450 ${\mathrm {GeV/}}\mathit c$

PL B453 305

A Partial Wave Analysis of the Centrally Produced ${{\mathit K}^{+}}{{\mathit K}^{-}}$ and ${{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ Systems in ${{\mathit p}}{{\mathit p}}$ Interactions at 450 ${\mathrm {GeV/}}\mathit c$ and New Information on the Spin of the ${{\mathit f}_{{J}}{(1710)}}$

BELLAZZINI

PL B467 296

A Partial Wave Analysis of the Centrally Produced ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ System in ${{\mathit p}}{{\mathit p}}$ Interactions at 450 ${\mathrm {GeV/}}\mathit c$

FRENCH

PL B460 213

A Partial Wave Analysis of the Centrally Produced ${{\mathit K}^{+}}{{\mathit K}^{-}}$ System in ${{\mathit p}}{{\mathit p}}$ Interactions at 300 ${\mathrm {GeV/}}\mathit c$

EPJ A3 361

Study of the ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ System with the GAMS-4000 Spectrometer at 100 ${\mathrm {GeV/}}\mathit c$

Also

PAN 62 405

Investigation of the ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ System at a Primary Momentum of 100 ${\mathrm {GeV/}}\mathit c$ by using the GAMS-4000 Spectrometer

BERTIN

PR D57 55

Study of the ${{\mathit f}_{{0}}{(1500)}}/{{\mathit f}_{{2}}{(1565)}}$ Production in the Exclusive Annihilation ${{\overline{\mathit n}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ in Flight

FRABETTI

1997D

PL B407 79

Analysis of the ${{\mathit D}^{+}}$, ${{\mathit D}_{{s}}^{+}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{+}}$ Dalitz Plots

PL B380 453

A Study of ${{\mathit f}_{{0}}{(1500)}}$ Decays into 4${{\mathit \pi}^{0}}$ in ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ 5 ${{\mathit \pi}^{0}}$ at Rest

AMELIN

1996B

PAN 59 976

Study of Diffractive Reaction ${{\mathit \pi}^{-}}$ ${{\mathit A}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \eta}}{{\mathit \pi}^{-}}{{\mathit A}}$ at the Momentum P$_{{{\mathit \pi}^{-}}}$ = 37 ${\mathrm {GeV/}}\mathit c$

BUGG

NP B471 59

New Results on ${{\mathit \pi}}{{\mathit \pi}}$ Phase Shifts Between 600 and 1900 MeV

1995C

PL B353 571

High Statistics Study of ${{\mathit f}_{{0}}{(1525)}}$ Decay into ${{\mathit \eta}}{{\mathit \eta}}$

1995B

PL B342 433

High Statistical Study of ${{\mathit f}_{{0}}{(1500)}}$ Decay into ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$

ANTINORI

PL B353 589

A Further Study of the Centrally Produced ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ and ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ Channels in ${{\mathit p}}{{\mathit p}}$ Interactions at 300 and 450 ${\mathrm {GeV/}}\mathit c$

ABATZIS

1994

PL B324 509

Observation of a Narrow Scalar Meson at 1450 MeV in the Reaction ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}_{{f}}}$( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$) ${{\mathit p}_{{s}}}$ at 450 ${\mathrm {GeV/}}\mathit c$ using the CERN OMEGA Spectrometer

1994E

PL B340 259

${{\mathit \eta}}{{\mathit \eta}^{\,'}}$ Threshold Enhancement in ${{\overline{\mathit p}}}{{\mathit p}}$ Annihilations into ${{\mathit \pi}^{0}}{{\mathit \eta}}{{\mathit \eta}^{\,'}}$ at Rest

1992

PL B291 347

Proton Antiproton Annihilation into ${{\mathit \eta}}{{\mathit \eta}}{{\mathit \pi}}$: Observation of a Scalar Resonance Decaying into ${{\mathit \eta}}{{\mathit \eta}}$

BELADIDZE

1992C

SJNP 55 1535

Study of the Process ${{\mathit \pi}^{-}}$ ${{\mathit A}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \eta}^{\,'}}{{\mathit \eta}}{{\mathit A}}$ at 36 ${\mathrm {GeV/}}\mathit c$

ARMSTRONG

1989E

PL B228 536

Evidence for New States Produced in the Central Region in the Reaction ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}_{{f}}}$( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$) ${{\mathit p}_{{s}}}$ at 300 ${\mathrm {GeV/}}\mathit c$

1988

PL B201 160

Production of ${{\mathit G}{(1590)}}$ Meson in 300 GeV Central ${{\mathit \pi}}$-Nuclei Collisions

1987

PL B198 286

Neutral Mesons Decaying into 4${{\mathit \pi}^{0}}$

1986D

NP B269 485

Production of ${{\mathit G}{(1590)}}$ and other Mesons Decaying into ${{\mathit \eta}}$ Pairs by 100 ${\mathrm {GeV/}}\mathit c$ ${{\mathit \pi}^{-}}$ on Protons

1984C

NC 80A 363

Study of ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}^{\,'}}{{\mathit \eta}}{{\mathit n}}$ in a Search for Glueballs

NC 78A 313

Observation of Scalar ${{\mathit G}{(1590)}}$ Meson Decaying into ${{\mathit \eta}}{{\mathit \eta}}$

Also

SJNP 38 561

Observation of Scalar ${{\mathit G}{(1590)}}$ Meson Decaying into ${{\mathit \eta}}{{\mathit \eta}}$

GRAY