GlueX Physics

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Review Papers

  • Recent Review Papers on Hadron Spectroscopy
    • Baryon Spectroscopy, Eberhard Klempt and Jean Marc Richard, (2009) arXiv.
    • The Experimental Status of Glueballs, Volker Crede and Curtis A Meyer, Prog. Part. Nucl. Phys. 63 (2009)74-116 arXiv
    • Glueballs, hybrids, multiquarks Experimental facts versus QCD inspired concepts, Eberhard Klempt and Alexander Zaitsev, Phys. Rep. 454 (2007)1–202, arXiv

Exotic Quantum Number Mesons

  • Experimental Measurements
    • Search for the photo-excitation of exotic mesons in the π+ π+ π- system, M. Nozar, et al. (CLAS Collaboration), Phys. Rev. Lett. 102 (2009), 102002, PRL.
    • Partial wave analysis of the π-π-π+ and π-π0π0 systems and the search for a JPC=1-+ meson, A.R. Dzierba, et al., Phys. Rev. D73, (2006), 072001, PRD.
    • Exotic Meson Decays to ω πoπ-, M. Lu et al. (E852 Collaboration), Phys. Rev.94, (2005), 032002, PRL.
    • Study of the Reaction π-p → η' π0 n at the VES Spectrometer, Y. Guoz (VES Collaboration), AIP Conf. Proc. 717 (2004) 145-149.
    • Exotic Meson Production in the f1(1285) π<sup-</sup> System observed in the Reaction π-p → η π+ π- π- p at 18 GeV/c, J. Kuhn (E852 Collaboration), Phys. Lett. B595, (2004), 109-117, Science Direct.
    • ρ π states in the anti-proton neutron annihilation into π- 3π0, F. Meyer-Wildhagen et al. (Crystal Barrel Collaboration), Nucl. Phys. A721 (2003), 605-608, Science Direct.
    • Exotic and qq̅ resonances in the ππ-π- system produced in π- p collisions at 18 GeV/c, S.U. Chung, et al. (E852 Collaboration), Phys. Rev. D65, (2002),1-16,PRD.
    • Observation of Exotic Meson Production in the Reaction π-p→ η' π- p at 18 GeV/c , E.I. Ivanov (E852 Collaboration), Phys. Rev. Lett.86 (2001), 3977.
    • Study of reaction π-A → π+ π- π- A at VES setup, I. Kachaev (VES Collaboration), (2001), arXiv.
    • The JPC=1−+ hunting season at VES, V. Dorofeev (VES Collaboration), (2001), arXiv.
    • Evidence for a ηπ-wave with odd angular momentum in antiproton-proton-annhilations at rest into π0π0η, A. Abele et al. (Crystal Barrel Collaboration), Phys. Lett. B446 (1999), 349, Science Direct.
    • Observation of a New JPC)=1-+ Exotic State in the Reaction π-p→π+π-π-p at 18 GeV/c, G.S. Adams (E852 Collaboration), Phys. Rev. Lett. 26 (1998), 5760.
    • Exotic ηπ State in antiproton-deuterium Annihilation at Rest into ηπ-π0 pspectator, A. Abele et al. (Crystal Barrel Collaboration), Phys. Lett. B423 (1998), 175.
    • Study of resonance production in diffractive reaction π- A → π+ π- π- A, D.V. Amelin (VES Collaboration), Phys. Lett. B356, (1995), 595, Science Direct.
    • Study of π- N → η π- N and π- N → η' π- N reactions at 37-GeV/c, G.M. Beladidze (VES Collaboration), Phys. Lett. B313, (1993), 276-282.
  • Model Calculations and Interpretations
    • Study of the eta pi and eta-prime pi spectra and interpretation of possible exotic JPC=1-+ mesons, A.P. Szczepaniak, M. Swat, A.R. Dzierba and S. Teige, Phys. Rev. Lett. 91 (2003), 092002, PRL.

Lattice QCD Calculations

  • Hybrid Meson Calculations
    • Highly excited and exotic meson spectrum from dynamical lattice QCD, Jozef J Dudek, Robert G Edwards, David G Richards, Christopher E Thomas, (2009), arXiv.
    • Decay width of light quark hybrid meson from the lattice, C. McNeile and C. Michael, Phys. Rev. D73, (2006), 074506, arXiv.
    • Lattice calculation of 1-+ hybrid mesons with improved Kogut-Susskind fermions, C. Bernard et al., Phys. Rev. D68, (2003), 074505, arXiv.
    • The heavy-quark hybrid meson spectrum in lattice QCD, J. Juge, J. Kuti and C. Morningstar, AIP Conf.Proc.688 (2004),193-207, arXiv.
    • Hybrid meson decay from the lattice, C. McNeile, C. Michael and P. Pennanen, Phys. Rev. D65, (2002), 094505, arXiv.
    • Ab initio study of hybrid anti-b g b mesons, K.J. Juge, J. Kuti and C.J. Morningstar, Phys. Rev. Lett.82 (1999), 4400-4403, PRL.
    • Exotic mesons in quenched lattice QCD, C. Bernard et al. (MILC Collaboration), Phys. Rev. D56 (1997), 7039, PRD.
    • Hybrid mesons from quenched QCD, P. Lacock, C. Michael, P. Boyle and P. Rowland, Phys. Lett. B401 (1996), 308-312, arXiv.
  • Glueball Calculations
    • Glueball spectrum and matrix elements on anisotropic lattices, Y. Chen et al., Phys. Rev. D73 (2006), 014516, PRD.
    • The Glueball spectrum from an anisotropic lattice study, C. Morningstar et al., Phys. Rev. D60 (1999), 034509, PRD.

Photoproduction

  • Experimental Papers
    • Differential cross sections and spin density matrix elements for γp → ω p, M. Williams, et al., (CLAS Collaboration), submitted to Phys. Rev. C (2009), arXiv.
    • Partial wave analysis of γ p → ω p and the search for nucleon resonances, M. Williams, et al., (CLAS Collaboration), submitted to Phys. Rev. C (2009), arXiv.
    • Differential cross sections for the reactions γ p → η p and γ p → η' p, M. Williams, et al., (CLAS Collaboration), submitted to Phys. Rev. C (2009), arXiv.
    • On the Analysis of Vector-Meson Production by Polarized Photons,K. Schilling, P. Seyboth and G. Wolf, Nucl. Phys. B15 (1970), 397-412, pdf
    • Bubble-Chamber Study of Photoproduction by 2.8 and 4.7 GeV Polarized Photons. I. Cross-Section Determination and Production of ρ0 and Δ++ in the Reaction γp → pπ+π- J. Ballam et al., Phys. Rev. D5 (1972), 545-589, pdf.
    • Vector-Meson Production by Polarized Photons at 2.8, 4.7 and 9.3 GeV, J. Ballam et al., Phys. Rev. D7 (1973), 3150-3177, pdf.
    • Spin-Parity Analysis of ρ' in the reaction γ p → π+ π+ π- π-p at 9 to 18 GeV, Joseph C.H. Park, Nucl. Phys. B58, (1973), 45-54, pdf.
    • High-Energy Production and Decay of vector and Tensor Mesons, A.C. Irving and C. Michel, Nucl. Phys. B82, (1974), 282-325, pdf.
    • The Reaction γ p → π+ π- π+ π- p at High-energy and dissociation into 4π, M. Davier, et al., Nucl. Phys. B58 (1973), 31-44, pdf.

Strong Decay Models

Attempts at modeling strong decays date from 1969, when Micu suggested that hadron decay proceeds through $q\bar q$ pair production with vacuum quantum numbers, J^{{PC}}=0^{{++}}. Since this corresponds to a 3P0 q{\bar  q} state, it is now generally referred to as the 3p0 decay model. This suggestion was developed and applied extensively by Le Yaouanc et al. in the 1970s. Studies of hadron decays using the 3p0 model have been concerned almost exclusively with numerical predictions, and have not led to any fundamental modifications to the original model. Recent studies have considered changes in the spatial dependence of the pair production amplitude as a function of quark coordinates but the fundamental decay mechanism is usually not addressed; this is widely believed to be a nonperturbative process, involving ``flux tube breaking". There have been some studies of the decay mechanism which consider an alternative phenomenological model in which the q{\bar  q} pair is produced with 3S1 quantum numbers; this possibility however appears to disagree with experiment.

  • mesons
    • Higher quarkonia, T.Barnes, F.E. Close, P.R. Page and E.S. Swanson, Phys. Rev. D55 (1997), 4157-4188 PRD.
    • On the mechanism of open flavor strong decays, E.S. Ackleh, T. Barnes and E.S. Swanson, Phys. Rev. D54 (1996), 6811-6829, PRD.
    • Hybrid and conventional mesons in the flux tube model: Numerical studies and their phenomenological implications, T. Barnes, F.E. Close and E.S. Swanson, Phys. Rev. D52 (1995), 5242-5256, PRD.
    • The Quenched Approximation In The Quark Model, P. Geiger and N. Isgur, Phys. Rev. D41 (1990), 1595, PRD.
    • Meson Decays by Flux Tube Breaking, R. Kokoski and N. Isgur, Phys. Rev. D35 (1987), 907, PRD.
    • A Flux Tube Model for Hadrons in QCD, N. Isgur, J. E. Paton, Phys. Rev. D31 (1985), 2910, PRD.
    • A Flux Tube Model for Hadrons N. Isgur and J. E. Paton, Phys. Lett. B124, (1983), 247, Science Direct.
  • hybrids
    • The "forbidden" decays of hybrid mesons to π ρ can be large, F.E. Close and J.J. Dudek, Phys. Rev. D70 (2004), 094015, arXiv.
    • Hybrid Meson Decay Phenomenology, P.R. Page, E.S. Swanson and A.P. Szczepaniak, Phys. Rev. D59 (1999), 034016, arXiv.
    • Why Hybrid Meson Coupling to Two S-wave Mesons is Suppressed, P.R. Page, Phys. Lett. B402 (1996), 183-188, arXiv.
    • Q anti-Q G Hermaphrodite Mesons in the MIT Bag Model, T. Barnes, F.E. Close, F. de Viron and J. Weyers, Nucl. Phys. B224 (1983), 241, Science Direct.
    • Gluonic Excitations of Mesons: Why They Are Missing and Where to Find Them, N. Isgur, R. Kokoski and J. E. Paton, Phys. Rev. Lett. 54 (1985), 869, PRL.