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Diffraction dissociation, resonances and deck mechanism in the Kω systems of the reactions K±p→(K±ω)p

Nuclear Physics B
Publication Date
DOI: 10.1016/0550-3213(81)90504-6


Abstract A study is presented of the reactions K +p→(K + ω)p at 8.25 and 16 GeV/ c and K −p→(K − ω)p at 10 and 16 GeV/ c and comparison is made with K + results at 10 GeV/ c and K − at 7.3 GeV/ c. The (K +ω) and (K −ω) mass spectra both present a strong enhancement very near threshold, while a second peak at ∼1.7 GeV is evident only with incident K − at the lower energies. The threshold peak has very weak energy dependence and is mostly due to the 1 +S state which is produced conserving s-channel helicity. It is suggested that this is another decay mode of the resonance Q 1(1290) known to decay mainly into Kϱ. The ratio of the Q 1 coupling constants to the Kω and Kϱ decay channels, R ω = g K ω 2/ g K ϱ 2 is determined to be 0.21±0.04. The enhancement at 1.7 GeV is predominantly, but not exclusively, due to the 2 − state. While the K + and K − induced reactions give basically similar results, small differences are observed that can be qualitatively explained in the framework of the Deck model.

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