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Kienle, P.; Maggiora, M.; Suzuki, K.; Yamazaki, T.; Alexeev, M.; Balestra, F.; Bedfer, Y.; Bertini, R.; Bland, L. C.; Brenschede, A.; Brochard, F.; Bussa, M. P.; Chiosso, M.; Choi, Seonho; Colantoni, M. L.; Dressler, R.; Dzemidzic, M.; Faivre, J. -Cl; Ferrero, A.; Ferrero, L.; Foryciarz, J.; Fröhlich, I.; Frolov, V.; Garfagnini, R.; Grasso, A.; Heinz, S.; Jacobs, W. W.; Kühn, W.; Maggiora, A.; Panzieri, D.; Pfaff, H. -W.; Pontecorvo, G.; Popov, A.; Ritman, J.; Salabura, P.; Tchalyshev, V.; Tosello, F.; Vigdor, S. E.; Zosi, G.
The European physical journal. A, Hadrons and nuclei, 12/2012, Letnik: 48, Številka: 12Journal Article
Analyzing DISTO data of pp → p Λ K + at T p = 2.50 and 2.85GeV to populate a previously reported X (2265) -resonance with M x = 2267 MeV/c 2 and Γ x = 118 MeV at 2.85GeV, we found that the yield of X (2265) at 2.50GeV is much less than that at 2.85GeV (less than 10%), though it is expected from a kinematical consideration to be produced as much as 33% of that at 2.85GeV. The small population of X (2265) at 2.50GeV is consistent with the very weak production of Γ(1405) at the same incident energy toward its production threshold, thus indicating that Γ(1405) plays an important role as a doorway state for the formation of X (2265).
