Novel Interpretation of the ''{Theta}{sup +}(1540) Pentaquark'' Peak

Journal Article · Fri Aug 27 00:00:00 EDT 2010 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.105.092001· OSTI ID:21470988

Martinez Torres, A; Oset, E ^[1]

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1. Departamento de Fisica Teorica and IFIC, Centro Mixto Universidad de Valencia-CSIC, Institutos de Investigacion de Paterna, Apartado 22085, 46071 Valencia (Spain)

We use a theoretical model of the {gamma}d{yields}K{sup +}K{sup -}np reaction adapted to the experiment done at LEPS where a peak was observed and associated with the {Theta}{sup +}(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{sup +}n invariant mass in the region of the claimed {Theta}{sup +}(1540), such that the remaining strength seen for the experimental peak is compatible with a fluctuation of 2{sigma} significance.

• OSTI ID: 21470988
• Journal Information: Physical Review Letters, Vol. 105, Issue 9; Other Information: DOI: 10.1103/PhysRevLett.105.092001; (c) 2010 American Institute of Physics; ISSN 0031-9007
• Country of Publication: United States
• Language: English

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NEUTRONS
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