Anti-hyperon Polarization in $pA$ and $Σ^-A$ Collisions and Intrinsic Antidiquark State in Incident Baryon

Details Anti-hyperon Polarization in $pA$ and $Σ^-A$ Collisions and Intrinsic Antidiquark State in Incident Baryon Anti-hyperon Polarization in $pA$ and $Σ^-A$ Collisions and Intrinsic Antidiquark State in Incident Baryon

2011-05-09

arxiv.org/abs/1105.1588v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 figures, changed 15 to 17 pages, added sub-section 3.3, added description in sub-section 2.2 and 3.1, added a reference and

Scientific paper

10.1142/S0218301312500012

We discuss the relation between the polarization of inclusively produced (anti)-hyperons and the incident baryon states in the framework of the constituent quark-diquark cascade model. We assume that there is an intrinsic diquark-antidiquark state in the incident baryon, in which the intrinsic diquark immediately fragments into a non-leading baryon and the antidiquark behaves as a valence constituent. It is also assumed that the valence (anti)diquark in the incident nucleon tends to combine selectively with a spin-down sea quark and, on the othe hand, the spin-up valence quark in the projectile is chosen by a sea (anti)diquadk in preference to the spin-down valence quark. It is found that the incident spin-1/2 baryon is mainly composed of a spin-0 valence diquark and a valence quark, and contains an intrinsic diquark-antidiquark state with a probability of about 7%.

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