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

par Chliapnikov, P.;Ciapetti, Guido;Dunwoodie, William;Gold-Schmidt-Clermont, Y.;Grant, A.;Muller, Francis;Pape, Luc;Sekera, Z.;Stergiou, A.;Tuominiemi, J.K.;Yamdagni, N.;Jobes, M.;Kinson, J.B.;Storr, K.M. K.M.;Watkins, D.C. D.C.;de Wolf, Els;Peeters, Philippe ;Verbeure, F;Grard, Fernand ;Henri, Victor;Herquet, P. ;Windmolders, Roland
Référence Nuclear physics. B, 112, 1, page (1-51)
Publication Publié, 1976-09

Article révisé par les pairs

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Résumé :

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.