Pentaquark and diquark-diquark clustering: a QCD sum rule approach

Details Pentaquark and diquark-diquark clustering: a QCD sum rule approach Pentaquark and diquark-diquark clustering: a QCD sum rule approach

2004-04-15

arxiv.org/abs/hep-ph/0404126v3

Phys.Lett. B597 (2004) 314-320

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 3 figures; discussions extended, references added, version to appear in Phys. Lett. B

Scientific paper

10.1016/j.physletb.2004.07.029

In this work we study the Theta(1540) in the framework of QCD sum rules based on (ud)^2\bar{s} diquark clustering as suggested by Jaffe and Wilczek. Within errors, the mass of the pentaquark is compatible with the experimentally measured value. The mass difference between the Theta and the pentaquark with the quantum numbers of the nucleon amounts to 70 MeV, consistent with the interpretation of the N(1440) as a pentaquark.

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