Hypertriton and light nuclei production at A-production subthreshold energy in heavy-ion collisions
High-energy heavy-ion collisions produce abundant hyperons and nucleons. A dynamical coales- cence model coupled with the ART model is employed to study the production probabilities of light clusters, deuteron (d), triton (t), helion (3He), and hypertriton (~H) at subthreshold energy of A production...
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Veröffentlicht in: | 中国物理C:英文版 2011-08, Vol.35 (8), p.741-746 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | High-energy heavy-ion collisions produce abundant hyperons and nucleons. A dynamical coales- cence model coupled with the ART model is employed to study the production probabilities of light clusters, deuteron (d), triton (t), helion (3He), and hypertriton (~H) at subthreshold energy of A production (= 1 GeV per nucleon). We study the dependence on the reaction system size of the coalescence penalty factor per additional nucleon and entropy per nucleon. The Strangeness Population Factor (S3 =3H/(3He ×∧/p)) shows an extra suppression of hypertriton comparing to light clusters of the same mass number. This model predicts a hypertriton production cross-section of a few μb in ^36Ar+^36Ar, ^40Ca+^40Ca and ^56Ni+^56Ni in 1 A GeV reactions. The production rate is as high as a few hypertritons per million collisions, which shows that the fixed-target heavy-ion collisions at CSR (Lanzhou/China) at A subthreshold energy are suitable for breaking new ground in hypernuclear physics. |
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ISSN: | 1674-1137 0254-3052 |
DOI: | 10.1088/1674-1137/35/8/008 |