Subthreshold cascade production in heavy ion collisions

Feng Li, Lie Wen Chen, Che Ming Ko, Su Houng Lee

Research output: Contribution to journalConference article

Abstract

Using a gauged avor SU(3)-invariant hadronic Lagrangian, we have calculated the cross sections for the strangeness-exchange reactions Y Y → NΞ (Y = λ,∑) in the Born approximation. These cross sections are then used in the Relativistic Vlasov-Uehling-Uhlenbeck (RVUU) transport model to study Ξ production in Ar+KCl collisions at incident energy of 1.76A GeV and impact parameter b = 3:5 fm. We find that including the contributions of hyperon-hyperon scattering channels strongly enhances the yield of Ξ, leading to the abundance ratio Ξ̄/(λ + ∑0) = 3:38 × 10-3, which is essentially consistent with the recently measured value of (5.6 ± 1.2+1.8 -1.7) × 10 -3 by the HADES collaboration at GSI.

Original languageEnglish
Article number012015
JournalJournal of Physics: Conference Series
Volume420
Issue number1
DOIs
Publication statusPublished - 2013 Jan 1
Event11th International Conference on Nucleus-Nucleus Collisions, NN 2012 - San Antonio, TX, United States
Duration: 2012 May 272012 Jun 1

Fingerprint

ionic collisions
cascades
strangeness
cross sections
Born approximation
collisions
scattering
energy

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Li, Feng ; Chen, Lie Wen ; Ko, Che Ming ; Lee, Su Houng. / Subthreshold cascade production in heavy ion collisions. In: Journal of Physics: Conference Series. 2013 ; Vol. 420, No. 1.
@article{c209d14ad39f4cdd93a2cfaa2539fd63,
title = "Subthreshold cascade production in heavy ion collisions",
abstract = "Using a gauged avor SU(3)-invariant hadronic Lagrangian, we have calculated the cross sections for the strangeness-exchange reactions Y Y → NΞ (Y = λ,∑) in the Born approximation. These cross sections are then used in the Relativistic Vlasov-Uehling-Uhlenbeck (RVUU) transport model to study Ξ production in Ar+KCl collisions at incident energy of 1.76A GeV and impact parameter b = 3:5 fm. We find that including the contributions of hyperon-hyperon scattering channels strongly enhances the yield of Ξ, leading to the abundance ratio Ξ̄/(λ + ∑0) = 3:38 × 10-3, which is essentially consistent with the recently measured value of (5.6 ± 1.2+1.8 -1.7) × 10 -3 by the HADES collaboration at GSI.",
author = "Feng Li and Chen, {Lie Wen} and Ko, {Che Ming} and Lee, {Su Houng}",
year = "2013",
month = "1",
day = "1",
doi = "10.1088/1742-6596/420/1/012015",
language = "English",
volume = "420",
journal = "Journal of Physics: Conference Series",
issn = "1742-6588",
publisher = "IOP Publishing Ltd.",
number = "1",

}

Subthreshold cascade production in heavy ion collisions. / Li, Feng; Chen, Lie Wen; Ko, Che Ming; Lee, Su Houng.

In: Journal of Physics: Conference Series, Vol. 420, No. 1, 012015, 01.01.2013.

Research output: Contribution to journalConference article

TY - JOUR

T1 - Subthreshold cascade production in heavy ion collisions

AU - Li, Feng

AU - Chen, Lie Wen

AU - Ko, Che Ming

AU - Lee, Su Houng

PY - 2013/1/1

Y1 - 2013/1/1

N2 - Using a gauged avor SU(3)-invariant hadronic Lagrangian, we have calculated the cross sections for the strangeness-exchange reactions Y Y → NΞ (Y = λ,∑) in the Born approximation. These cross sections are then used in the Relativistic Vlasov-Uehling-Uhlenbeck (RVUU) transport model to study Ξ production in Ar+KCl collisions at incident energy of 1.76A GeV and impact parameter b = 3:5 fm. We find that including the contributions of hyperon-hyperon scattering channels strongly enhances the yield of Ξ, leading to the abundance ratio Ξ̄/(λ + ∑0) = 3:38 × 10-3, which is essentially consistent with the recently measured value of (5.6 ± 1.2+1.8 -1.7) × 10 -3 by the HADES collaboration at GSI.

AB - Using a gauged avor SU(3)-invariant hadronic Lagrangian, we have calculated the cross sections for the strangeness-exchange reactions Y Y → NΞ (Y = λ,∑) in the Born approximation. These cross sections are then used in the Relativistic Vlasov-Uehling-Uhlenbeck (RVUU) transport model to study Ξ production in Ar+KCl collisions at incident energy of 1.76A GeV and impact parameter b = 3:5 fm. We find that including the contributions of hyperon-hyperon scattering channels strongly enhances the yield of Ξ, leading to the abundance ratio Ξ̄/(λ + ∑0) = 3:38 × 10-3, which is essentially consistent with the recently measured value of (5.6 ± 1.2+1.8 -1.7) × 10 -3 by the HADES collaboration at GSI.

UR - http://www.scopus.com/inward/record.url?scp=84875972768&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84875972768&partnerID=8YFLogxK

U2 - 10.1088/1742-6596/420/1/012015

DO - 10.1088/1742-6596/420/1/012015

M3 - Conference article

AN - SCOPUS:84875972768

VL - 420

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

SN - 1742-6588

IS - 1

M1 - 012015

ER -