Difference between revisions of "GlueX Physics Review Papers"
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* <b>Recent Review Papers on Hadron Spectroscopy</b> | * <b>Recent Review Papers on Hadron Spectroscopy</b> | ||
| + | ** <i>The Status of Exotic-quantum-number Mesons</i>, Curtis A. Meyer and Yves Van Haarlem, (2010). | ||
| + | ***<font color=blue>The search for mesons with non-quark-antiquark (exotic) quantum numbers has gone on for nearly thirty years. There currently is experimental evidence of three isospin one states, the π<sub>1</sub>(1400), the π<sub>1</sub>(1600) and the π<sub>1</sub>(2015). For all of these states, there are questions about the identification of these state, and even if some of them exist. In this article, we will review both the theoretical work and the experimental evidence associated with these exotic quantum number states. We find that the π<sub>1</sub>(1600) could be the lightest exotic quantum number hybrid meson, but observations of other members of the nonet would be useful.</font> | ||
** <i>Baryon Spectroscopy</i>, Eberhard Klempt and Jean Marc Richard, (2009) [http://arxiv.org/abs/0901.2055v1 arXiv]. | ** <i>Baryon Spectroscopy</i>, Eberhard Klempt and Jean Marc Richard, (2009) [http://arxiv.org/abs/0901.2055v1 arXiv]. | ||
***<font color=blue>About 120 baryons and baryon resonances are known, from the abundant nucleon with u and d light-quark constituents up to the recently discovered Ω<sub>b</sub><sup>-</sup>=bss, and the Ξ<sub>b</sub><sup>-</sup>=bsd which contains one quark of each generation. In spite of this impressively large number of states, the underlying mechanisms leading to the excitation spectrum are not yet understood. Heavy-quark baryons suffer from a lack of known spin-parities. In the light-quark sector, quark-model calculations have met with considerable success in explaining the low-mass excitations spectrum but some important aspects like the mass degeneracy of positive-parity and negative-parity baryon excitations are not yet satisfactorily understood. At high masses, above 1.8 GeV, quark models predict a very high density of resonances per mass interval which is not observed. In this review, issues are identified discriminating between different views of the resonance spectrum; prospects are discussed how open questions in baryon spectroscopy may find answers from photo- and electro-production experiments which are presently carried out in various laboratories.</font> | ***<font color=blue>About 120 baryons and baryon resonances are known, from the abundant nucleon with u and d light-quark constituents up to the recently discovered Ω<sub>b</sub><sup>-</sup>=bss, and the Ξ<sub>b</sub><sup>-</sup>=bsd which contains one quark of each generation. In spite of this impressively large number of states, the underlying mechanisms leading to the excitation spectrum are not yet understood. Heavy-quark baryons suffer from a lack of known spin-parities. In the light-quark sector, quark-model calculations have met with considerable success in explaining the low-mass excitations spectrum but some important aspects like the mass degeneracy of positive-parity and negative-parity baryon excitations are not yet satisfactorily understood. At high masses, above 1.8 GeV, quark models predict a very high density of resonances per mass interval which is not observed. In this review, issues are identified discriminating between different views of the resonance spectrum; prospects are discussed how open questions in baryon spectroscopy may find answers from photo- and electro-production experiments which are presently carried out in various laboratories.</font> | ||
Revision as of 16:31, 5 April 2010
Contents
GlueX Physics
Review Papers
- Recent Review Papers on Hadron Spectroscopy
- The Status of Exotic-quantum-number Mesons, Curtis A. Meyer and Yves Van Haarlem, (2010).
- The search for mesons with non-quark-antiquark (exotic) quantum numbers has gone on for nearly thirty years. There currently is experimental evidence of three isospin one states, the π1(1400), the π1(1600) and the π1(2015). For all of these states, there are questions about the identification of these state, and even if some of them exist. In this article, we will review both the theoretical work and the experimental evidence associated with these exotic quantum number states. We find that the π1(1600) could be the lightest exotic quantum number hybrid meson, but observations of other members of the nonet would be useful.
- Baryon Spectroscopy, Eberhard Klempt and Jean Marc Richard, (2009) arXiv.
- About 120 baryons and baryon resonances are known, from the abundant nucleon with u and d light-quark constituents up to the recently discovered Ωb-=bss, and the Ξb-=bsd which contains one quark of each generation. In spite of this impressively large number of states, the underlying mechanisms leading to the excitation spectrum are not yet understood. Heavy-quark baryons suffer from a lack of known spin-parities. In the light-quark sector, quark-model calculations have met with considerable success in explaining the low-mass excitations spectrum but some important aspects like the mass degeneracy of positive-parity and negative-parity baryon excitations are not yet satisfactorily understood. At high masses, above 1.8 GeV, quark models predict a very high density of resonances per mass interval which is not observed. In this review, issues are identified discriminating between different views of the resonance spectrum; prospects are discussed how open questions in baryon spectroscopy may find answers from photo- and electro-production experiments which are presently carried out in various laboratories.
- The Experimental Status of Glueballs, Volker Crede and Curtis A Meyer, Prog. Part. Nucl. Phys. 63 (2009)74-116 arXiv
- Glueballs and other resonances with large gluonic components are predicted as bound states by Quantum Chromodynamics (QCD). The lightest (scalar) glueball is estimated to have a mass in the range from 1 to 2 GeV/c2; a pseudoscalar and tensor glueball are expected at higher masses. Many different experiments exploiting a large variety of production mechanisms have presented results in recent years on light mesons with JPC = 0++, 0-+, and 2++ quantum numbers. This review looks at the experimental status of glueballs. Good evidence exists for a scalar glueball which is mixed with nearby mesons, but a full understanding is still missing. Evidence for tensor and pseudoscalar glueballs are weak at best. Theoretical expectations of phenomenological models and QCD on the lattice are briefly discussed.
- Glueballs, hybrids, multiquarks Experimental facts versus QCD inspired concepts, Eberhard Klempt and Alexander Zaitsev, Phys. Rep. 454 (2007)1–202, arXiv
- The spectroscopy of light and heavy mesons is reviewed with emphasis on glueballs, hybrids, and tetraquarks.
- The Status of Exotic-quantum-number Mesons, Curtis A. Meyer and Yves Van Haarlem, (2010).
