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arXiv · 1105.1588

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

Hujio Noda·Tsutomu Tashiro·Shin-ichi Nakariki
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Abstract

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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Hujio Noda, Tsutomu Tashiro, Shin-ichi Nakariki. 2012-01-30. Anti-hyperon Polarization in $pA$ and $Σ^-A$ Collisions and Intrinsic Antidiquark State in Incident Baryon. https://doi.org/10.1142/s0218301312500012

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