Hyperon polarization at high energies

Szwed, J.

doi:10.1016/0370-2693(81)90788-7

Cited by 73 publications

(54 citation statements)

References 10 publications

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“…From a theoretical point of view the origin of sizable hyperon polarization in p+A and A 1 +A 2 collisions represents a significant problem since in the perturbative QCD it is expected to be small [59]. Several phenomenological models have been proposed to explain observed polarizations [60][61][62][63][64].…”

Section: Inclusive Particle Polarizations In Heavy-ion Collisionsmentioning

confidence: 99%

Spin physics experiments at NICA-SPD with polarized proton and deuteron beams

et al. 2016

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We propose to perform measurements of asymmetries of the DY pair"s production in collisions of non-polarized, longitudinally and transversally polarized protons and deuterons which provide an access to all leading twist collinear and TMD PDFs of quarks and anti-quarks in nucleons. The measurements of asymmetries in production of J/Ψ and direct photons will be performed as well simultaneously with DY using dedicated triggers. The set of these measurements will supply complete information for tests of the quark-parton model of nucleons at the QCD twisttwo level with minimal systematic errors. PAC Recommendations:….The PAC heard with interest a report on the preparation of the Letter of Intent "Spin physics experiments at NICA-SPD with polarized proton and deuteron beams" presented by I. Savin. The PAC is pleased to see the first steps toward formation of an international collaboration around the SPD experiment. The PAC regards the SPD experiment as an essential part of the NICA research program and encourages the authors of the Letter of Intent to prepare a full proposal and present it at one of the forthcoming meetings of the PAC. … --

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Section: Inclusive Particle Polarizations In Heavy-ion Collisionsmentioning

confidence: 99%

Spin physics experiments at NICA-SPD with polarized proton and deuteron beams

et al. 2016

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“…Currently, there exist two distinct pictures for the spin structure of nucleon, i.e., the SU (6) picture based on the SU(6) wave function of the baryon, and the DIS picture based on the polarized deeply inelastic lepton-nucleon scattering data and other inputs such as symmetry assumptions and data from other experiments. It is of particular interest to know which one is suitable here.…”

Section: The Physical Picturementioning

confidence: 99%

“…Since the discovery [1,2] in 1970s, the surprisingly large transverse polarization of hyperons in unpolarized high energy hadron-hadron and hadron-nucleus collisions has been a standing hot topic in High Energy Spin Physics (see e.g, [1,2,3,4,5,6,7,8,9,10,11,12,13], and the references cited therein.). Experimentally, there are a large number of similar experiments that have been performed at different energies and/or using different projectiles and/or targets and for the production of different hyperons [3].…”

Section: Introductionmentioning

confidence: 99%

“…Experimentally, there are a large number of similar experiments that have been performed at different energies and/or using different projectiles and/or targets and for the production of different hyperons [3]. Theoretically, different models have been proposed [4,5,6,7,8,9,10,11,12,13], the aim of which is to understand the origin(s) of this striking spin effect in high energy reactions. Clearly such studies should provide us with useful information on the spin structure of the hadron and the spin dependence of strong interactions.…”

Section: Introductionmentioning

confidence: 99%

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

Dong

Liang

2004

Phys. Rev. D

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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.

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“…These measurements have provided valuable insights into the spin structure of baryon production in high-energy proton collisions and the dependence of baryon polarization on target material. However no theoretical model has been completely successful in explaining these results [5][6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%