PT Journal
AU Martinez Torres, A
   Oset, E
TI Novel Interpretation of the "Theta(+)(1540) Pentaquark" Peak
SO Physical Review Letters
JI Phys. Rev. Lett.
PY 2010
BP 092001
EP 4pp
VL 105
IS 9
DI 10.1103/PhysRevLett.105.092001
LA English
AB 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.
ER