Hyperon polarization in different inclusive production processes in unpolarized high energy hadron-hadron collisions

Abstract

We apply the picture proposed in a previous Letter, which relates the hyperon polarization in unpolarized hadron-hadron collisions to the left-right asymmetry in singly polarized reactions, to the production of different hyperons in reactions using different projectiles and/or targets. We discuss the different ingredients of the proposed picture in detail and present the results for hyperon polarization in the reactions such as pp, K − p, π ± p, and Σ − p collisions. We compare the results with the available data and make predictions for future experiments.

Lambda hyperon production and polarization in collisions of p(3.5 GeV)+Nb

“…Various models are proposed, assigned either to the quark-exchange [52,53,54,55,56,57] or to the meson-exchange picture [58,59,60,61,62]. But, there is still no theoretical description which is able to explain the experimental observations consistently [49].…”

Transverse $Λ^0$ polarization in inclusive photoproduction: quark recombination model

“…The existing phenomenological approaches are, in more or less extent, fragmentary in reproducing the data (see, e.g., Refs. [24,25,26,27,28,29,30,31,32,33,34,35] and the references therein).…”

Transverse Λ0 polarization in inclusive quasi-real photoproduction at the current fragmentation

“…Certainly, there have been proposed many models attempting to account for the results, e.g. [4,5,6,7,8,9,10,11,12,13,14,15,16], however neither of them is able to describe the complete set of the available measurements.…”

“…[4,5,6,7,8,9,10,11,12,13,14,15,16], however neither of them is able to describe the complete set of the available measurements.…”