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${{\mathit f}_{{0}}{(500)}}$ BREIT-WIGNER WIDTH

INSPIRE   PDGID:

M014W

VALUE (MeV) DOCUMENT ID TECN  COMMENT $\bf{ 100\text{ to }800 }$ OUR ESTIMATE • • We do not use the following data for averages, fits, limits, etc. • • $335$ $\pm67$ 1 MURAMATSU 2002 CLEO ${{\mathit e}^{+}}{{\mathit e}^{-}}$ $\approx{}$ 10 GeV $324$ ${}^{+42}_{-40}$ $\pm21$ AITALA 2001 B E791 ${{\mathit D}^{+}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{+}}$ $372$ ${}^{+229}_{-95}$ 2 ISHIDA 2001 ${{\mathit \Upsilon}{(3S)}}$ $\rightarrow$ ${{\mathit \Upsilon}}{{\mathit \pi}}{{\mathit \pi}}$ $540$ 3 ASNER 2000 CLE2 ${{\mathit \tau}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \nu}_{{\tau}}}$ $372$ $\pm80$ ISHIDA 2000 B ${{\mathit p}}$ ${{\overline{\mathit p}}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ $119$ $\pm13$ ALEKSEEV 1999 SPEC 1.78 ${{\mathit \pi}^{-}}{{\mathit p}}_{{\mathrm {polar}}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit n}}$ $77$ $\pm22$ ALEKSEEV 1998 SPEC 1.78 ${{\mathit \pi}^{-}}{{\mathit p}}_{{\mathrm {polar}}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit n}}$ $35$ $\pm12$ 4 TROYAN 1998 $5.2$ ${{\mathit n}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit n}}{{\mathit p}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ $780$ $\pm60$ ALDE 1997 GAM2 450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ $385$ $\pm70$ 5 ISHIDA 1997 ${{\mathit \pi}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$ $290$ $\pm54$ 6 SVEC 1996 RVUE $6 - 17$ ${{\mathit \pi}}$ ${{\mathit N}}$ $_{{\mathrm {polar}}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit N}}$ $\sim$$880$ 7, 8 TORNQVIST 1996 RVUE ${{\mathit \pi}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$ , ${{\mathit K}}{{\overline{\mathit K}}}$ , ${{\mathit K}}{{\mathit \pi}}$ , ${{\mathit \eta}}{{\mathit \pi}}$ $460$ $\pm40$ 9, 10 ANISOVICH 1995 RVUE ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit n}}$ , ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ , ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \eta}}$ , ${{\mathit \pi}^{0}}{{\mathit \eta}}{{\mathit \eta}}$ $494$ $\pm58$ 6 AUGUSTIN 1989 DM2 1  Statistical uncertainty only. 2  A similar analysis (KOMADA 2001 ) finds $301$ ${}^{+145}_{-100}$ MeV. 3  From the best fit of the Dalitz plot. 4  6$\sigma $ effect, no PWA. 5  Reanalysis of data from HYAMS 1973 , GRAYER 1974 , SRINIVASAN 1975 , and ROSSELET 1977 using the interfering amplitude method. 6  Breit-Wigner fit to S-wave intensity measured in ${{\mathit \pi}}$ ${{\mathit N}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit N}}$ on polarized targets. The fit does not include ${{\mathit f}_{{0}}{(980)}}$. 7  Uses data from ASTON 1988 , OCHS 1973 , HYAMS 1973 , ARMSTRONG 1991B, GRAYER 1974 , CASON 1983 , ROSSELET 1977 , and BEIER 1972B. Coupled channel analysis with flavor symmetry and all light two-pseudoscalars systems. 8  Also observed by ASNER 2000 in ${{\mathit \tau}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \nu}_{{\tau}}}$ decays. 9  Uses ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ data from ANISOVICH 1994 , AMSLER 1994D, and ALDE 1995B, ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ data from OCHS 1973 , GRAYER 1974 and ROSSELET 1977 , and ${{\mathit \eta}}{{\mathit \eta}}$ data from ANISOVICH 1994 . 10  The pole is on Sheet III. Demonstrates explicitly that ${{\mathit f}_{{0}}{(500)}}$ and ${{\mathit f}_{{0}}{(1370)}}$ are two different poles.

References:

MURAMATSU 2002 PRL 89 251802 Dalitz Analysis of ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ Also PRL 90 059901 (errat.) Erratum to MURAMATSU 2002 . Dalitz Analysis of ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ AITALA 2001B PRL 86 770 Experimental Evidence for a Light and Broad Scalar Resonance in ${{\mathit D}^{+}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{+}}$ Decay ISHIDA 2001 PL B518 47 The ${{\mathit \sigma}}$ Meson Production in Excited ${{\mathit \Upsilon}}$ Decay Processes: Constraint from Chiral Symmetry ASNER 2000 PR D61 012002 Hadronic Structure in the Decay ${{\mathit \tau}^{-}}$ $\rightarrow$ ${{\mathit \nu}_{{\tau}}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ and the Sign of the ${{\mathit \nu}_{{\tau}}}$ Helicity ISHIDA 2000B PTP 104 203 Effect of Light ${{\mathit \sigma}}$ Meson Production in ${{\mathit p}}$ ${{\overline{\mathit p}}}$ $\rightarrow$ 3 ${{\mathit \pi}^{0}}$ at Rest ALEKSEEV 1999 NP B541 3 Study of the Reaction ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $↑$ $\rightarrow$ ${{\mathit \pi}^{-}}$ ${{\mathit \pi}^{+}}$ ${{\mathit n}}$ on a Polarized Proton Target at 17.78 GeV/$\mathit c$. Experiment and Amplitude Analysis ALEKSEEV 1998 PAN 61 174 Study of the Reaction ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $↑$ $\rightarrow$ ${{\mathit \pi}^{-}}$ ${{\mathit \pi}^{+}}$ ${{\mathit n}}$ on a Polarized Proton Target at 17.78 GeV/$\mathit c$. Experiment and Amplitude Analysis TROYAN 1998 JINRRC 5-91 33 The Evidence of ${{\mathit \sigma}}_{0{}^{+}0{}^{++}}$ Meson at a Mass M$_{{{\mathit \pi}^{+}} {{\mathit \pi}^{-}}}$ = ($759$ $\pm5$) ${\mathrm {MeV}}/\mathit c{}^{2}$ Observed in ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ Combinations from the Reaction ${{\mathit n}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit n}}{{\mathit p}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ at an Incident Moment of ${{\mathit p}}_{n}$ (5.20 $\pm{}$ 0.16) GeV/$\mathit c$ ALDE 1997 PL B397 350 Study of the ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ System in ${{\mathit p}}{{\mathit p}}$ Central Collisions at 450 ${\mathrm {GeV/}}\mathit c$ ISHIDA 1997 PTP 98 1005 Further Analysis on sigma Particle Properties SVEC 1996 PR D53 2343 Study of ${{\mathit \sigma}{(750)}}$ and ${{\mathit \rho}{(770)}^{0}}$ Production in Measurements of ${{\mathit \pi}}$ ${{\mathit N}}$ $↑$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit N}}$ on a Polarized Target at 5.98, 11.85, and 17.2 ${\mathrm {GeV/}}\mathit c$ TORNQVIST 1996 PRL 76 1575 Resurrection of the ${{\mathit \sigma}}$ Meson ANISOVICH 1995 PL B355 363 Two Resonance Structure of the ($\mathit I(\mathit J{}^{PC}) = 0(0{}^{++})$) ${{\mathit \pi}}{{\mathit \pi}}$ Amplitude in Mass Region around 1 GeV AUGUSTIN 1989 NP B320 1 Study of the ${{\mathit J / \psi}}$ Decay into Five Pions