Rapidity Clusterings in Hadronic Production

Abstract

We elaborate on the role of secondary Regge singularities in the framework of the shortrange correlation picture of hadronic production. Their presence is seen to imply the existence of 'local clusterings" in the rapidity distributions of events with a fixed multiplicity. In this scheme, the approach to the scaling limit in the central region is a manifestation of the "threshold" effect of "cluster" formation. An explicit model is constructed where the scaling limit can be approached from below. This i s then explained from the point of view of Markovian walk in one dimension.

Signature of the Λ(1405) Resonance in Neutron Spectra from the K − + d Reaction

“…It was shown, that due to strong kinematical masking effect the inclusive neutron spectra do not exhibit a peak, corresponding to the Λ(1405) resonance and show no difference for the four potentials. These spectra are in agreement with the only available experimental data [10]. We demonstrated, that the deviation spectrum method is able to eliminate the disturbing kinematical factors and differentiate between potentials with different pole structure.…”

“…Therefore, to bring the curves together, the experimental ones were scaled down, as indicated in the captions. The difference of the scaling factors (and of the arbitrary units on the y-axis) corresponds to the fact, that the number of neutrons coming with Σ − exceeds the number of those, emitted with Σ + by a factor of ∼ 2.5 (in [10] it was estimated as 2). The agreement can be considered as acceptable, especially having in mind the experimental uncertainties.…”

“…The only available experimental data on neutron spectra from the reaction (1) are those of Tan [10] from a bubble chamber experiment. Comparison with his results is shown in Fig.…”