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Title: Hypertriton and light nuclei production at Lambda-production subthreshold energy in heavy-ion collisions

Abstract

High-energy heavy-ion collisions produce abundant hyperons and nucleons. A dynamical coalescence model coupled with the ART model is employed to study the production probabilities of light clusters, deuteron (d), triton (t), helion ({sup 3}He), and hypertriton ({sub {Lambda}}{sup 3}H) at subthreshold energy of Aproduction ({approx} 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 (S{sub 3} = {sup 3}{sub {Lambda}}H/({sup 3}He x {Lambda}/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 {mu}b in {sup 36}Ar+{sup 36}Ar, {sup 40}Ca+{sup 40}Ca and {sup 56}Ni+{sup 56}Ni 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 {Lambda} subthreshold energy are suitable for breaking new ground in hypernuclear physics.

Authors:
;
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States). Relativistic Heavy Ion Collider (RHIC)
Sponsoring Org.:
DOE - OFFICE OF SCIENCE
OSTI Identifier:
1034069
Report Number(s):
BNL-96384-2011-JA
Journal ID: ISSN 1674-1137; R&D Project: PO-003; KB0202012; TRN: US1200729
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Journal Article
Journal Name:
Chinese Physics C
Additional Journal Information:
Journal Volume: 35; Journal Issue: 8; Journal ID: ISSN 1674-1137
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; COALESCENCE; DEUTERONS; ENTROPY; HYPERONS; LIGHT NUCLEI; MASS NUMBER; NUCLEONS; PHYSICS; PRODUCTION; STRANGENESS; hyperon; hypernuclei; dynamic coalescence; relativistic heavy ion collider

Citation Formats

Zhang, S, Zu, Z, and Chen, J.H., Ma, Y.G., Cai, X-Z, Ma, G.L., Zhong, C. Hypertriton and light nuclei production at Lambda-production subthreshold energy in heavy-ion collisions. United States: N. p., 2011. Web. doi:10.1088/1674-1137/35/8/008.
Zhang, S, Zu, Z, & Chen, J.H., Ma, Y.G., Cai, X-Z, Ma, G.L., Zhong, C. Hypertriton and light nuclei production at Lambda-production subthreshold energy in heavy-ion collisions. United States. https://doi.org/10.1088/1674-1137/35/8/008
Zhang, S, Zu, Z, and Chen, J.H., Ma, Y.G., Cai, X-Z, Ma, G.L., Zhong, C. 2011. "Hypertriton and light nuclei production at Lambda-production subthreshold energy in heavy-ion collisions". United States. https://doi.org/10.1088/1674-1137/35/8/008.
@article{osti_1034069,
title = {Hypertriton and light nuclei production at Lambda-production subthreshold energy in heavy-ion collisions},
author = {Zhang, S and Zu, Z and Chen, J.H., Ma, Y.G., Cai, X-Z, Ma, G.L., Zhong, C.},
abstractNote = {High-energy heavy-ion collisions produce abundant hyperons and nucleons. A dynamical coalescence model coupled with the ART model is employed to study the production probabilities of light clusters, deuteron (d), triton (t), helion ({sup 3}He), and hypertriton ({sub {Lambda}}{sup 3}H) at subthreshold energy of Aproduction ({approx} 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 (S{sub 3} = {sup 3}{sub {Lambda}}H/({sup 3}He x {Lambda}/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 {mu}b in {sup 36}Ar+{sup 36}Ar, {sup 40}Ca+{sup 40}Ca and {sup 56}Ni+{sup 56}Ni 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 {Lambda} subthreshold energy are suitable for breaking new ground in hypernuclear physics.},
doi = {10.1088/1674-1137/35/8/008},
url = {https://www.osti.gov/biblio/1034069}, journal = {Chinese Physics C},
issn = {1674-1137},
number = 8,
volume = 35,
place = {United States},
year = {2011},
month = {8}
}