Pentaquark Searches in Electron-Positron Annihilations and Two-Photon Collisions at LEP

Abstract

Evidence for the production of exotic hadron states composed of five quarks (pentaquarks) has been searched for in data collected by the ALEPH, DELPHI, and L3 experiments at LEP. No significant signal is observed. Several 95% C.L. upper limits are set on the production rates of such particles.

Presented at the 6th International Conference on Hyperon, Charm and Beauty Hadrons - Chicago

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Cited by in corpus (21)

• Search for ${\Theta }^{+}(1540)$ pentaquark in high statistics measurement of $\gamma p\to {\bar{K}}^0{K}^{+}n$ at CLAS
• Search for the ${\Theta }^{+}$ pentaquark in the reactions $\gamma p\to {\bar{K}}^0{K}^{+}n$ and $\gamma p\to {\bar{K}}^0{K}^{0}p$
• Search for the Theta+ pentaquark in the gamma d -> Lambda n K+ reaction measured with CLAS
• Search for the pentaquark resonance signature in lattice QCD
• On the Existence of Heavy Pentaquarks: The large Nc and Heavy Quark Limits and Beyond
• Light hadron and diquark spectroscopy in quenched QCD with overlap quarks on a large lattice
• Spin 3/2 Penta-quarks in anisotropic lattice QCD
• The X(3872) Meson and "Exotic" Spectroscopy at CDF II
• A lattice study of the pentaquark states
• Search for a pentaquark decaying to p K_S^0
• A comprehensive search for the Θ^+ pentaquark on the lattice
• Vector transition form factors of the $N{K}^{\ast }\to {\Theta }^{+}$ and $N{\bar{K}}^{\ast }\to {\Sigma }_{\overline{10}}^{\ast -}$ in the SU(3) chiral quark-soliton model
• Photoproduction of the Theta^+ resonance on the nucleon in a Regge model
• Search for the pentaquark candidate ${\Theta }^{+}$(1540) in the hyperon beam experiment WA89
• Search for Higher Flavor Multiplets in Partial Wave Analyses
• Absence of evidence for pentaquarks on the lattice
• Search for Exotic S=-2 Baryons in proton-antiproton Collisions at sqrt(s) = 1.96 TeV
• Heptaquarks with two heavy antiquarks in a simple chromomagnetic model
• Positive parity pentaquark towers in large Nc QCD
• Micro-canonical pentaquark production in $\ee$ annihilations
• Search for the Theta^+(1540) in lattice QCD