The $\sigma$ pole in $J/\psi \to \omega {\pi }^{+}{\pi }^{-}$

Abstract

Using a sample of 58 million $J/\psi$ events recorded in the BESII detector, the decay $J/\psi \to \omega {\pi }^{+}{\pi }^{-}$ is studied. There are conspicuous $\omega f_2(1270)$ and $b_1(1235)\pi$ signals. At low $\pi \pi$ mass, a large broad peak due to the $\sigma$ is observed, and its pole position is determined to be $(541\pm 39)$ - $i$ $(252\pm 42)$ MeV from the mean of six analyses. The errors are dominated by the systematic errors.

15 pages, 6 figures, submitted to PLB

Cited by in corpus (77)

• Nature of the f_0(600) from its N_c dependence at two loops in unitarized Chiral Perturbation Theory
• The K^*_0(800) scalar resonance from Roy-Steiner representations of pi K scattering
• Explaining the Many Threshold Structures in the Heavy-Quark Hadron Spectrum
• Production of $f_0(1710)$, $f_0(1500)$, and $f_0(1370)$ in $J/\psi$ hadronic decays
• An explanation of Belle states Z_b(10610) and Z_b(10650)
• Dalitz-plot analysis of the decays B+/- --> K+/- pi-/+ pi+/-
• Determination of spin and parity of the $Z_c(3900)$
• Spin-Parity Analysis of ppbar Mass Threshold Structure in J/psi and psi' Radiative Decays
• On the size of the sigma meson and its nature
• Couplings in coupled channels versus wave functions in the case of resonances: application to the two $\Lambda (1405)$ states
• Model Independent Measurement of \swave $K^{-}{\pi }^{+}$ systems using $\Dp\to Kππ$ Decays from Fermilab E791
• Cross Sections for the Reactions e+e- --> K+ K- pi+pi-, K+ K- pi0pi0, and K+ K- K+ K- Measured Using Initial-State Radiation Events
• Analysis of the resonant components in B0->J/ψpi+pi-
• QCD Tests of the Puzzling Scalar Mesons
• How Resonances can synchronise with Thresholds
• Strong and electromagnetic decays of the light scalar mesons interpreted as tetraquark states
• Light Scalar Tetraquark Mesons in the QCD Sum Rule
• The pole structure of the unitary, crossing symmetric low energy $\pi \pi$ scattering amplitudes
• Dalitz plot analysis of Ds+ --> K+ K- pi+
• Dalitz plot analysis of e+ e- --> pi0 pi0 gamma events at SQRT(s) ~ M(phi) with the KLOE detector
• Possibility of measuring a0(980)-f0(980) mixing from J/psi -> phi a0
• Partial Wave Analysis of ${\chi }_{c0}\to {\pi }^{+}{\pi }^{-}{K}^{+}{K}^{-}$
• A Study in Depth of f0(1370)
• An amplitude analysis of the ${\pi }^0{\pi }^0$ system produced in radiative $J/\psi$ decays
• Lepton flavor violating decays of vector quarkonia and of the $Z$ boson
• The mass of the sigma pole
• An alternative approach to the $\sigma$-meson-exchange in nucleon-nucleon interaction
• A possible 0^{-+} glueball candidate X(1835)
• Amplitude Analysis of the Decay B+- -> pi+- pi+- pi-+
• Observation of a resonant structure in $e^{+}{e}^{-}\to K^{+}{K}^{-}{\pi }^0{\pi }^0$
• Improved Analysis of J/psi Decays into a Vector Meson and Two Pseudoscalars
• Hadron Spectroscopy: Theory and Experiment
• The effect of hidden color channels on nucleon-nucleon interaction in quark model
• Observation of 1^-0^- Final States from psi(2S) Decays and e^+e^- Annihilation
• Pseudoscalar production at omega omega threshold in J/psi -> gamma omega omega
• Observation of a broad 1^-- resonant structure around 1.5 GeV/$c^2$ in the K^+K^- mass spectrum in J/psi --> K^+K^-pi^0
• Further study of the $N\Omega$ dibaryon within constituent quark models
• Observation of $D^{+}\to f_0(500)e^{+}{\nu }_e$ and Improved Measurements of $D\to \rho e^{+}{\nu }_e$
• From the Kappa via the Ds0*(2317) to the chi_c0: connecting light and heavy scalar mesons
• Positive Parity Scalar Mesons in the 1-2 GeV Mass Range
• Sigma meson in pole-dominated QCD sum rules
• Observation of Thirteen New Exclusive Multi-Body Hadronic Decays of the $\psi (2S)$
• Reconclining phi radiative decays with other data for a0(980), fo(980), pi-pi -> KK and pi-pi -> eta-eta
• A coherent study of ${\chi }_{c0,2}\to VV$, $PP$ and $SS$
• Decays of sigma, kappa, a0(980) and fo(980)
• Measurement of CP Asymmetries and Branching Fractions in a Time-Dependent Dalitz Analysis of B^0-->(rho pi)^0 and a Constraint on the Quark Mixing Angle phi_2
• An update on the Kappa
• Study of the D^0 \to pi^-pi^+pi^-pi^+ decay
• Triangle singularities in $J/\psi \to \eta {\pi }^0\varphi$ and ${\pi }^0{\pi }^0\varphi$
• Observation and study of the decay $J/\psi \to \varphi \eta {\eta }^{\prime }$
• The X(3872) and the 3941 MeV peak in omega+J/Psi
• Mass terms in the Skyrme Model
• Light Scalar Meson sigma(600) in QCD Sum Rule with Continuum
• Search for a strangeonium-like structure $Z_s$ decaying into $\varphi \pi$ and a measurement of the cross section $e^{+}{e}^{-}\to \varphi \pi \pi$
• Scalar and Vector 4Q Systems in Anisotropic Lattice QCD
• Lowest-lying Tetra-Quark Hadrons in Anisotropic Lattice QCD
• Subthreshold rho contribution in J/psi decay to omega pion pion and Kaon anti-Kaon pion
• Scalar resonances in a unitary $\pi -\pi$ $S$-wave model for $D^{+}\to {\pi }^{+}{\pi }^{-}{\pi }^{+}$
• e+e- --> e+e- pi0 pi0 at Daphne
• Study of the Decay $D_s^{+}\to {\pi }^{+}{\pi }^{+}{\pi }^{-}\eta$ and Observation of the W-annihilation Decay $D_s^{+}\to a_0(980{)}^{+}{\rho }^0$
• $\rho \rho$ scattering revisited with coupled-channels of pseudoscalar mesons
• Study of light scalar mesons through $D_s^{+}\to {\pi }^0{\pi }^0{e}^{+}{\nu }_e$ and $K_S^0{K}_S^0{e}^{+}{\nu }_e$ decays
• Single and Double Peripheral Production of Sigmas in Proton Proton Collisions
• Scalar resonances: scattering and production amplitudes
• Configuration mixing and effective baryon-baryon interactions
• New Results From CLEO and BES
• The lowest resonance in QCD from low--energy data
• Experimental study of psi' decays to K+K- pi^0 and K+K- eta
• Chiral Structure of Scalar and Pseudoscalar Mesons
• S-wave and P-wave pion-pion and kaon-pion contributions to three-body decay processes in the Resonance-Spectrum Expansion
• KKbar molecules with momentum-dependent interactions
• Experimental disagreements with Extended Unitarity
• The D-pi S-wave
• A helpful analogy between the covalent bond and Particle Spectroscopy
• Amplitude analysis of $D^{+}\to K_S^0{\pi }^{+}{\pi }^{+}{\pi }^{-}$
• Studies on ${\pi }^{+}{\pi }^{-}$ phase motion in the ${\Psi }^{\prime }\to J/\Psi {\pi }^{+}{\pi }^{-}$ process
• The Three-body Force and the Tetraquark Interpretation of Light Scalar Mesons