An alternative explanation for the "Theta^+(1540) pentaquark peak

por Alberto Martínez Torres (IFIC Valencia)

viernes 5 mar. 2010 12:00 → 13:00 Europe/Madrid

Sala Seminarios IFIC (Edf. Institutos de Investigación)

We use a theoretical model of the gamma d to K^+ K^- p n reaction adapted to the experiment done at LEPS where a peak was observed and associated to the Theta^+(1540) pentaquark. The study shows that the method used in the experiment to associate momenta to the undetected proton and neutron necessarily creates a peak in the K^+ n invariant mass region of the claimed Theta^+(1540).