Triquark correlations and pentaquarks in a QCD sum rule approach

Abstract

The role of quark correlations in the description of hadron dynamics in many domains of physics, from low energy dynamics to very hot(dense) systems, is being appreciated. Strong correlations of two quarks (diquark) have been widely investigated in this respect. Recently, we have proposed a dynamical scheme to describe the ${\Theta }^{+}$ pentaquark in which also three quark correlations (triquark) were instrumental in producing a low mass exotic state. We perform a study, within the QCD sum rule approach including OPE and direct instanton contributions, of triquark correlations and obtain two quasi-bound light $ud\bar{s}$ color quark clusters of 800 MeV and 930 MeV respectively.

arXiv comment11 pages, 9 figures, corrected typos, reference added, introduction and conclusions modified slightly

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Cited by in corpus (11)

• The Physics of Glueballs
• Pentaquark Theta^+(1540) production in gamma N --> K Anti-K N
• Instanton interpolating current for $\sigma$--tetraquark
• A New Approach to Physics of Nuclei
• QCD sum rules for the anti-charmed pentaquark
• A QCD sum rule analysis of the pentaquark
• Spin 3/2 Pentaquarks
• Triquark structure and isospin symmetry breaking in exotic Ds mesons
• Regge trajectories for the triply heavy triquarks
• Baryons and baryoniums in the perspective of QCD sum rules
• Relativistic Calculation of the Width of the Theta (1540) Pentaquark