The reactions K+ m ̊p → ΛX++ and K+ p → ΛX++ at incident momenta of 8.2 and 16.0 GeV/c

Inclusive production of Λ and Λ in K+ p interactions is studied at incident momenta of 8.2 and 16.0 GeV/c. Cross sections and single-particle distributions are presented, the correlation between longitudinal and transverse momentum is investigated, and the dependence of average charge multiplicity on missing mass measured. For Λ production, early scaling is observed in the target fragmentation region when the data are presented in terms of (M2-Mth2)/s and t, where Mth is the threshold value of the missing mass M. Furthermore, a triple-Regge analysis in these variable yields an effective exchange trajectory which passes through the K, Q and L mesons. There is evidence for beam fragmentation in Λ and Λ production, but the contributions seem not to be dominant in the fragmentation region. Nevertheless, the parameter values in a triple-Regge description are estimated, and together with those for target fragmentation in Λ production, provide a complete description of the fragmentation contributions to the two reactions. Integration of the resultant distribution functions over the complete Chew-Low plot yields fragmentation cross sections increasing approximately as log s; in addition the observed features of the x, pL and pT2 projections and of the pL-pT correlation are well-described in the fragmentation regions. Central production contributions are isolated by subtracting the calculated fragmentation distributions. © 1976.SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Phenomenological comparison of inelastic electron-proton scattering with reaction K+ p → K0 + anything at 5, 8.2 and 16 GeV/c

We present an analysis of the reaction K+p → K0 + anything at incident momenta of 5, 8.2 and 16 GeV/c in terms of the Björken variables gw and x. Assuming dominance of ρ{variant} exchange, we derive the structure function F2(x, y) which is found similar to the one obtained in deep inelastic electroproduction. © 1976.SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Study of the inclusive reaction K+p → K0 + anything at 5, 8.2 and 16 GeV/c in the central region

The inclusive reaction K+p → K0 + X is studied at 5, 8.2 and 16 GeV/c. The energy dependence and the shapes of inclusive spectra in the central region are found to be consistent with double-Regge expansion. With the values obtained for the parameters of the Regge expansion, prediction are made for the behaviour of the cross section at higher energies. © 1975.SCOPUS: ar.jinfo:eu-repo/semantics/publishe

A spin-parity analysis of the K+K+K- system produced in the reaction K+p → K+K+K-p

We present the first spin-parity analysis of the K+K+K-) system produced in the reaction K+p → K+K+K-p, and show that the general features of this system resemble those of the (ππ+π-) and Kπ+π-) systems produced in the reactions π(K)p → π(K)π+π-p. There is a low mass enhancement, (47 ± 11)% of which corresponds to 1+ states decaying to Kø. At higher (K+K+K-) masses 2- → Kf′ becomes increasingly significant and at all masses there is a 0- contribution of roughly 30%. © 1975.SCOPUS: ar.jinfo:eu-repo/semantics/publishe

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

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 Q1(1290) known to decay mainly into Kρ{variant}. The ratio of the Q1 coupling constants to the Kω and Kρ{variant} decay channels, Rω = gKω2/gKρ{variant}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. © 1981.SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Resonance production in the reaction K+p → K0pπ+ at 5,8.25 and 16 GeV/c

We present a systematic analysis of the production of K*+(892) and Δ++(1236) resonances in the K+p → K0pπ+ reaction at 5, 8.25 and 16 GeV/c. We have measured total cross sections, differential cross sections, density matrix elements and examined resonance production mechanisms in terms of the exchange of states with definite naturality. Some results on the reaction K+p → K*+(1420)p are also given. © 1976.SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Study of the reaction K+p→ K*0 (890) Δ++ from 4.6-16.0 GeV/c

A systematic analysis is presented on the reaction K+p→K*0 (890) Δ++ for nine incident momenta between 4.6-16.0 GeV/c. Cross sections, differential cross sections and vector meson single density matrix elements are given. As a function of energy, little if any change is observed in either the shapes of the differential cross sections or in the values of the density matrix elements. The data are interpreted in terms of current ideas on t-channel exchange mechanisms. © 1973.SCOPUS: ar.jinfo:eu-repo/semantics/publishe