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Title

Novel Interpretation of the "Theta(+)(1540) Pentaquark" Peak

AuthorsMartínez Torres, Alberto ; Oset, Eulogi
Issue Date26-Aug-2010
PublisherAmerican Physical Society
CitationPhysical Review Letters 105 (9): 092001 (2010)
AbstractWe 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.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevLett.105.092001
URIhttp://hdl.handle.net/10261/27655
DOI10.1103/PhysRevLett.105.092001
ISSN0031-9007
Appears in Collections:(IFIC) Artículos
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