The Narrow Theta(1543)--A QCD Dilemma: Tube or Not Tube?

Details The Narrow Theta(1543)--A QCD Dilemma: Tube or Not Tube? The Narrow Theta(1543)--A QCD Dilemma: Tube or Not Tube?

2003-09-17

arxiv.org/abs/hep-ph/0309208v1

Phys.Lett. B578 (2004) 124-132

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 2 figures Please note that Nussinov has previously submitted entries to the ArXives through assistance of other indiv

Scientific paper

We argue that a width of less than MeV of the new Theta resonance is inconsistent with the observed ratio of resonance and background events in the various photon initiated experiments if the latter can be described by K, K*, etc., exchange. An evaluation of the Feynman diagrams which were believed to be relevant is presented and supports the general claim in the one case where a cross section has been given by the experimental group. More detailed arguments based on the flux tube model explaining the narrow widths and the apparent conflict with the production rates are presented. We predict narrow Tetra-quarks at mass ~ O(1-1.2 GeV) which the analysis of LEAR may have missed.

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