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Partial Wave Analysis of $J/\psi\to\gamma(\pi^+\pi^-\pi^+\pi^-)$

BES data on $J/\psi \to \gamma (\pi^{+} \pi^{-} \pi^{+} \pi^{-})$ have been analyzed into partial waves. We fit with resonances having $J^{PC}=2^{++}$ at 1275 MeV, $0^{++}$ at 1500 MeV, $2^{++}$ at 1565 MeV, $0^{++}$ at 1740 MeV, $2^{++}$…

High Energy Physics - Experiment · Physics 2008-11-26 J. Z. Bai

Low-lying Scalars in an extended Linear $\sigma$ Model

We formulate an extended linear $\sigma$ model of a quarkonia nonet and a tetraquark nonet as well as a complex iso-singlet (glueball) by virtue of chiral symmetry $SU_L(3) \times SU_R(3)$ and $U_A(1)$ symmetry. In the linear realization…

High Energy Physics - Phenomenology · Physics 2015-06-04 Tamal K. Mukherjee , Mei Huang , Qi-Shu Yan

Study of $f_1(1420)$ and $\eta(1405)$ in the decay $J/\psi \to \gamma \pi^{0}\pi^{0}\pi^{0}$

A partial-wave analysis is performed on the decay $J/\psi\to\gamma\pi^{0}\pi^{0}\pi^{0}$ within the $\pi^{0}\pi^{0}\pi^{0}$ invariant-mass region below 1.6 GeV$/c^{2}$, using $(10.09~\pm~0.04)\times10^{9} ~J/\psi$ events collected with the…

High Energy Physics - Experiment · Physics 2025-08-27 BESIII Collaboration , M. Ablikim , M. N. Achasov , P. Adlarson , O. Afedulidis , X. C. Ai , R. Aliberti , A. Amoroso , Q. An , Y. Bai , O. Bakina , I. Balossino , Y. Ban , H. -R. Bao , V. Batozskaya , K. Begzsuren , N. Berger , M. Berlowski , M. Bertani , D. Bettoni , F. Bianchi , E. Bianco , A. Bortone , I. Boyko , R. A. Briere , A. Brueggemann , H. Cai , X. Cai , A. Calcaterra , G. F. Cao , N. Cao , S. A. Cetin , X. Y. Chai , J. F. Chang , G. R. Che , Y. Z. Che , G. Chelkov , C. Chen , C. H. Chen , Chao Chen , G. Chen , H. S. Chen , H. Y. Chen , M. L. Chen , S. J. Chen , S. L. Chen , S. M. Chen , T. Chen , X. R. Chen , X. T. Chen , Y. B. Chen , Y. Q. Chen , Y. Q. Chen , Z. J. Chen , S. K. Choi , X. Chu , G. Cibinetto , F. Cossio , J. J. Cui , H. L. Dai , J. P. Dai , A. Dbeyssi , R. E. de Boer , D. Dedovich , C. Q. Deng , Z. Y. Deng , A. Denig , I. Denysenko , M. Destefanis , F. De Mori , B. Ding , X. X. Ding , Y. Ding , Y. Ding , J. Dong , L. Y. Dong , M. Y. Dong , X. Dong , M. C. Du , S. X. Du , Y. Y. Duan , Z. H. Duan , P. Egorov , G. F. Fan , J. J. Fan , Y. H. Fan , J. Fang , J. Fang , S. S. Fang , W. X. Fang , Y. Q. Fang , R. Farinelli , L. Fava , F. Feldbauer , G. Felici , C. Q. Feng , J. H. Feng , Y. T. Feng , M. Fritsch , C. D. Fu , J. L. Fu , Y. W. Fu , H. Gao , X. B. Gao , Y. Gao , Y. N. Gao , Y. N. Gao , S. Garbolino , I. Garzia , P. T. Ge , Z. W. Ge , C. Geng , E. M. Gersabeck , A. Gilman , K. Goetzen , L. Gong , W. X. Gong , W. Gradl , S. Gramigna , M. Greco , M. H. Gu , Y. T. Gu , C. Y. Guan , A. Q. Guo , L. B. Guo , M. J. Guo , R. P. Guo , Y. P. Guo , A. Guskov , J. Gutierrez , K. L. Han , T. T. Han , F. Hanisch , X. Q. Hao , F. A. Harris , K. K. He , K. L. He , F. H. Heinsius , C. H. Heinz , Y. K. Heng , C. Herold , T. Holtmann , P. C. Hong , G. Y. Hou , X. T. Hou , Y. R. Hou , Z. L. Hou , H. M. Hu , J. F. Hu , Q. P. Hu , S. L. Hu , T. Hu , Y. Hu , G. S. Huang , K. X. Huang , L. Q. 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Zhou , A. N. Zhu , J. Zhu , K. Zhu , K. J. Zhu , K. S. Zhu , L. Zhu , L. X. Zhu , S. H. Zhu , T. J. Zhu , W. D. Zhu , W. J. Zhu , W. Z. Zhu , Y. C. Zhu , Z. A. Zhu , J. H. Zou , J. Zu

Chiral Nonet Mixing in $\pi \eta$ Scattering

The generalized linear sigma model for mixing among two- and four-quark components of scalar (and psedudosclar) mesons below and above 1 GeV is applied to the $\pi\eta$ channel in which the isovector scalars $a_0(980)$ and $a_0(1450)$ are…

High Energy Physics - Phenomenology · Physics 2022-12-26 Amir H. Fariborz , Soodeh Zarepour , Esmaiel Pourjafarabadi , S. Mohammad Zebarjad

Theoretical study of scalar meson $a_0(1710)$ in the $\eta_c \to {\bar{K}}^0K^+\pi^- $ reaction

We investigate the process $\eta_c \to {\bar{K}}^0K^+\pi^-$ by taking into account the $S$-wave ${K^*\bar{K}^*}$ and $\rho\omega$ interactions within the unitary coupled-channel approach, where the scalar meson $a_0(1710)$ is dynamically…

High Energy Physics - Phenomenology · Physics 2023-12-15 Yan Ding , Xiao-Hui Zhang , Meng-Yuan Dai , En Wang , De-Min Li , Li-Sheng Geng , Ju-Jun Xie

Three channel model of meson-meson scattering and scalar meson spectroscopy

New solutions on the scalar -- isoscalar $\pi\pi$ phase shifts are analysed together with previous $K\bar{K}$ results using a separable potential model of three coupled channels ($\pi\pi$, $K\bar{K}$ and an effective $2\pi 2\pi$ system).…

High Energy Physics - Phenomenology · Physics 2008-11-26 R. Kaminski , L. Lesniak , B. Loiseau

Decays of the tensor glueball in a chiral approach

Glueballs remain an experimentally undiscovered prediction of QCD. Lattice QCD predicts a spectrum of glueballs, with the tensor $(J^{PC}=2^{++})$ glueball being the second lightest, behind the scalar glueball. From an effective hadronic…

High Energy Physics - Phenomenology · Physics 2023-10-18 Arthur Vereijken

The identification of glueballs - further tests

The indirect evidence for gluonic objects in gluon jets is recalled, more accurate tests at the LHC are possible. Estimates of gluonic and quarkonic components of scalar mesons are presented, which could be improved by further studies, in…

High Energy Physics - Phenomenology · Physics 2014-02-04 Wolfgang Ochs

Gluon Fragmentation into Glueballs and Hybrid Mesons

The constituent nature of candidate gluonic mesons can be studied by comparing their production in quark and gluon jets. The production rate for such mesons depends on the colour confinement processes at the end of the perturbative…

High Energy Physics - Phenomenology · Physics 2009-10-31 Peter Minkowski , Wolfgang Ochs

The scalar $f_0(500)$ and $f_0(980)$ resonances and vector mesons in the single Cabibbo-suppressed decays $\Lambda_c \to p K^+K^-$ and $p\pi^+\pi^-$

In the chiral unitary approach, we have studied the single Cabibbo-suppressed decays $\Lambda_c\to pK^+K^-$ and $\Lambda_c \to p \pi^+\pi^-$ by taking into account the $s$-wave meson-meson interaction as well as the contributions from the…

High Energy Physics - Phenomenology · Physics 2020-10-28 Zhe Wang , Yan-Yan Wang , En Wang , De-Min Li , Ju-Jun Xie

Resonances in the System of Pi+Pi- -- Mesons from the Reaction np->npPi+Pi- at Pn=5.20GeV/c: Search, Results of Direct Observations, Interpretation

Ten resonances were found in the mass spectrum of pi+pi- -system from the reaction np->nppi+pi- in np-interactions at Pn=5.20 GeV/c in the 1-m HBC of LHE JINR by using the criterion cos(teta)[c.m.c.] p>0. Such effects were not found in…

High Energy Physics - Experiment · Physics 2007-05-23 Yu. A. Troyan , E. B. Plekhanov , V. N. Pechenov , A. Yu. Troyan , A. V. Beljaev , A. P. Jerusalimov , S. G. Aracelian

Holographic Glueball Decay

We announce new results on glueball decay rates in the Sakai-Sugimoto model, a realization of holographic QCD from first principles that has only one coupling constant and an overall mass scale as free parameters. We extend a previous…

High Energy Physics - Phenomenology · Physics 2014-09-18 Frederic Brünner , Denis Parganlija , Anton Rebhan

Phenomenology of pseudotensor mesons and the pseudotensor glueball

We study the decays of the pseudotensor mesons $[ \pi_{2}(1670) , K_{2}(1770) , \eta_{2}(1645) , \eta_{2}(1870) ]$ interpreted as the ground-state nonet of $1^1 D_{2}$ $\bar{q}q$ states using interaction Lagrangians which couple them to…

High Energy Physics - Phenomenology · Physics 2016-12-21 Adrian Koenigstein , Francesco Giacosa

Scalar mesons as simple quark+antiquark states

The Nijmegen Unitarized Meson Model and its application to scalar mesons is briefly revisited. It is shown that all scalar states up to 1.5 GeV can be described as triplet-P-zero quark+antiquark states coupled to the OZI-allowed open and…

High Energy Physics - Phenomenology · Physics 2007-05-23 Eef van Beveren , George Rupp

Study of Scalar Mesons at BES-II

Recent results from BES-II experiment on hadron spectroscopy using $\jpsi$ and $\psi^\prime$ data samples collected in $e^+e^-$ annihilation are presented, including study of the scalar particles in $\jpsi$ radiative and hadronic decays,…

High Energy Physics - Experiment · Physics 2009-11-11 Haibo Li

Masses and widths of scalar-isoscalar multi-channel resonances from data analysis

Peculiarities of obtaining parameters for broad multi-channel resonances from data are discussed analyzing the experimental data on processes $\pi\pi\to\pi\pi,K\bar{K}$ in the $I^GJ^{PC}=0^+0^{++}$ channel in a model-independent approach…

High Energy Physics - Phenomenology · Physics 2014-01-22 Yurii S. Surovtsev , Petr Bydzovsky , Robert Kaminski , Valery E. Lyubovitskij , Miroslav Nagy

The radiative decay phi - gamma pi pi in a coupled channel model and the structure of f0(980)

A coupled channel model is used to study the nature of the scalar mesons produced in the decay phi - gamma pi pi. The KKbar molecular picture of f0(980) is found to be in a good agreement with the recent experimental data from SND and…

High Energy Physics - Phenomenology · Physics 2008-11-26 V. E. Markushin

pi-pi Scattering and the Meson Resonance Spectrum

A pi-pi, Kbar-K, and rho-rho(omega-omega) fully coupled channel model is used to predict the lowest isospin S, P, D, F-wave phase shifts and inelasticities for elastic pi-pi scattering from threshold to 2.0 GeV. As input the S-matrix is…

Nuclear Theory · Physics 2009-10-30 W. M. Kloet , B. Loiseau

Dispersive analysis of excited glueball states

Motivated by the determination for the spin-parity quantum numbers of the $X(2370)$ meson at BESIII, we extend our dispersive analysis on hadronic ground states to excited states. The idea is to start with the dispersion relation which a…

High Energy Physics - Phenomenology · Physics 2024-09-25 Hsiang-nan Li

Strong and electromagnetic decays of the light scalar mesons interpreted as tetraquark states

The study of two-pseudoscalar and two-photon decays for the scalar meson nonet below 1 GeV is performed within an effective approach in which the scalar resonances are described as (Jaffe's) tetraquark states. The dominant (fall apart…

High Energy Physics - Phenomenology · Physics 2008-11-26 Francesco Giacosa