The missing mass squared dependence of the average charged particle multiplicity in the reaction K+p → KoX++ from 5-16 GeV/c

The average charged particle multiplicity, 〈nch(MX2)〉, in the reaction K+p→KoX++ is studied as a function of the mass squared, MX2, of the recoil system X and also as a function of the Ko transverse momentum, pT, at incident momenta of 5.0, 8.2 and 16.0 GeV/c. The complete data samples yield distributions which are not independent of c.m. energy squared, s, They exhibit a linear dependence on log (MX2X/Mo2)[Mo2=1 GeV2] with a change in slope occurring for MX2≈s/2, and do not agree with the corresponding distributions of 〈nch〉 as a function of s for K+ p inelastic scattering. Sub-samples of the data for which Ko production via beam fragmentation, central production and target fragmentation are expected to be the dominant mechanisms show that, within error, the distribution of 〈nch(MX2)〉 versus MX2 is independent of incident momentum for each sub-sample separately. In particular in the beam fragmentation region the 〈nch(MX2)〉 versus MX2 distribution agrees rather well with that of 〈nch〉 versus s for inelastic K+p interactions. The latter result agrees with recent results on the reactions pp → pX and π-p → pX in the NAL energy range. Evidence is presented for the presence of different production mechanisms in these separate regions. © 1974.SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Scaling in the semi-inclusive reactions K+p → K♀n (charged) + anything at 5, 8.2 and 16 GeV/c

We study the scaling properties of the semi-inclusive reactions K+p → K0 + n (charged) + X0 (neutral) measuring the momentum spectra of K0-mesons for a given number of prongs n. Distributions of the particle density ω(dσn/dpL)/σn for the inclusive K0 at n = 2 and n = 4 show evidence for limited scaling at 5.0, 8.2 and 16 GeV/c incident K+ momenta. © 1972.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

Differential cross sections for the charge exchange process π+p→Λ0(π+p)\pi+p \to \Lambda^{0} (\pi+p) at 8, 16 and 23 GeV/c

The differential cross section d σ d t′ for the charge-exchange process π + p → π 0 ( π + p) at 8, 16 and 23 GeV/ c is presented for several regions of the π + p effective mass. It is found that the dip at t ′ ≈ 0.6 (GeV/ c ) 2 which is observed in the Δ(1236) mass band becomes a less pronounced structure in the higher mass regions. However, while the slope of the d σ d t′ distributions in the near-forward direction decreases strongly with increasing π + p mass, there is no evidence that the observed structure moves to higher values of t ′ as the π + p mass increases. These results are consistent with a Regge-exchange picture where the position of the dip is determined by the exchanged trajectory, but are inconsistent with a simple geometrical picture

Approach to scaling in proton fragmentation studied in the reactions K+p → π±X and K-p → π±X

Data are presented on inclusive single particle distributions in the proton fragmentation region for the reactions K+p → π±X at 8.2 and 16 GeV/c and K-p → π±X at 10 and 16 GeV/c. The energy dependence is studied and compared with the dual Regge model predictions for approach to scaling. None of the existing models is in full agreement with the data. The model of Chan and his collaborators is consistent with our results under the additional assumption of equality of vector and meson coupling constants in the pπ+ vertex in the Mueller diagram. © 1975.SCOPUS: ar.jinfo:eu-repo/semantics/publishe