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

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

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Martínez Torres, Alberto; Oset Báguena, Eulogio Perfil
This document is a artículoDate2010

Este documento está disponible también en : http://hdl.handle.net/10550/46673
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.

    Martínez Torres, Alberto Oset Báguena, Eulogio 2010 Novel Interpretation of the 'Theta(+)(1540) Pentaquark' Peak Physical Review Letters 105 9 092001
http://dx.doi.org/10.1103/PhysRevLett.105.092001

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