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Título : Novel Interpretation of the "Theta(+)(1540) Pentaquark" Peak
Autor : Martínez Torres, Alberto, Oset, Eulogi
Fecha de publicación : 26-Aug-2010
Editor: American Physical Society
Resumen: We use a theoretical model of the gamma d --> K+K- np reaction adapted to the experiment done at LEPS where a peak was observed and associated with the Theta(+)(1540) pentaquark. The study shows that the method used in the experiment to assign momenta to the undetected proton and neutron, together with the chosen cuts, necessarily creates an artificial broad peak in the assumed K(+)n invariant mass in the region of the claimed Theta(+)(1540), such that the remaining strength seen for the experimental peak is compatible with a fluctuation of 2 sigma significance.
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ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.105.092001
Citación : Physical Review Letters 105 (9): 092001 (2010)
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