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Title: Isospin dependence of relative yields of K{sup +} and K{sup 0} mesons at 1.528A GeV

Abstract

Results on K{sup +} and K{sup 0} meson production in {sub 44}{sup 96}Ru + {sub 44}{sup 96}Ru and {sub 40}{sup 96}Zr + {sub 40}{sup 96}Zr collisions at a beam kinetic energy of 1.528A GeV, measured with the FOPI detector at GSI-Darmstadt, are investigated as a possible probe of isospin effects in high-density nuclear matter. The measured double ratio (K{sup +}/K{sup 0}){sub Ru}/(K{sup +}/K{sup 0}){sub Zr} is compared to the predictions of a thermal model and a relativistic mean field transport model using two different collision scenarios and under different assumptions on the stiffness of the symmetry energy. We find good agreement with the thermal model prediction and the assumption of a soft symmetry energy for infinite nuclear matter, while more realistic transport simulations of the collisions show a similar agreement with the data but also exhibit a reduced sensitivity to the symmetry term.

Authors:
; ; ; ; ; ; ; ;  [1]; ; ; ; ;  [2]; ; ; ;  [3]; ;  [4]
  1. Gesellschaft fuer Schwerionenforschung, Darmstadt (Germany)
  2. Physikalisches Institut der Universitaet Heidelberg, Heidelberg (Germany)
  3. Laboratoire de Physique Corpusculaire, IN2P3/CNRS, and Universite Blaise Pascal, Clermont-Ferrand (France)
  4. Ruder Boskovic Institute, Zagreb (Croatia) (and others)
Publication Date:
OSTI Identifier:
20990926
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 75; Journal Issue: 1; Other Information: DOI: 10.1103/PhysRevC.75.011901; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; COLLISIONS; DENSITY; GEV RANGE; HEAVY ION REACTIONS; ISOSPIN; KAONS NEUTRAL; KINETIC ENERGY; MASS NUMBER; MEAN-FIELD THEORY; NUCLEAR MATTER; NUCLEAR MODELS; PARTICLE PRODUCTION; POTASSIUM IONS; RELATIVISTIC RANGE; SYMMETRY; TRANSPORT THEORY

Citation Formats

Lopez, X., Kim, Y. J., Andronic, A., Hartmann, O. N., Hildenbrand, K. D., Koczon, P., Leifels, Y., Reisdorf, W., Schuettauf, A., Herrmann, N., Benabderrahmane, M. L., Cordier, E., Merschmeyer, M., Pelte, D., Barret, V., Bastid, N., Crochet, P., Dupieux, P., Basrak, Z., and Caplar, R.. Isospin dependence of relative yields of K{sup +} and K{sup 0} mesons at 1.528A GeV. United States: N. p., 2007. Web. doi:10.1103/PHYSREVC.75.011901.
Lopez, X., Kim, Y. J., Andronic, A., Hartmann, O. N., Hildenbrand, K. D., Koczon, P., Leifels, Y., Reisdorf, W., Schuettauf, A., Herrmann, N., Benabderrahmane, M. L., Cordier, E., Merschmeyer, M., Pelte, D., Barret, V., Bastid, N., Crochet, P., Dupieux, P., Basrak, Z., & Caplar, R.. Isospin dependence of relative yields of K{sup +} and K{sup 0} mesons at 1.528A GeV. United States. doi:10.1103/PHYSREVC.75.011901.
Lopez, X., Kim, Y. J., Andronic, A., Hartmann, O. N., Hildenbrand, K. D., Koczon, P., Leifels, Y., Reisdorf, W., Schuettauf, A., Herrmann, N., Benabderrahmane, M. L., Cordier, E., Merschmeyer, M., Pelte, D., Barret, V., Bastid, N., Crochet, P., Dupieux, P., Basrak, Z., and Caplar, R.. Mon . "Isospin dependence of relative yields of K{sup +} and K{sup 0} mesons at 1.528A GeV". United States. doi:10.1103/PHYSREVC.75.011901.
@article{osti_20990926,
title = {Isospin dependence of relative yields of K{sup +} and K{sup 0} mesons at 1.528A GeV},
author = {Lopez, X. and Kim, Y. J. and Andronic, A. and Hartmann, O. N. and Hildenbrand, K. D. and Koczon, P. and Leifels, Y. and Reisdorf, W. and Schuettauf, A. and Herrmann, N. and Benabderrahmane, M. L. and Cordier, E. and Merschmeyer, M. and Pelte, D. and Barret, V. and Bastid, N. and Crochet, P. and Dupieux, P. and Basrak, Z. and Caplar, R.},
abstractNote = {Results on K{sup +} and K{sup 0} meson production in {sub 44}{sup 96}Ru + {sub 44}{sup 96}Ru and {sub 40}{sup 96}Zr + {sub 40}{sup 96}Zr collisions at a beam kinetic energy of 1.528A GeV, measured with the FOPI detector at GSI-Darmstadt, are investigated as a possible probe of isospin effects in high-density nuclear matter. The measured double ratio (K{sup +}/K{sup 0}){sub Ru}/(K{sup +}/K{sup 0}){sub Zr} is compared to the predictions of a thermal model and a relativistic mean field transport model using two different collision scenarios and under different assumptions on the stiffness of the symmetry energy. We find good agreement with the thermal model prediction and the assumption of a soft symmetry energy for infinite nuclear matter, while more realistic transport simulations of the collisions show a similar agreement with the data but also exhibit a reduced sensitivity to the symmetry term.},
doi = {10.1103/PHYSREVC.75.011901},
journal = {Physical Review. C, Nuclear Physics},
number = 1,
volume = 75,
place = {United States},
year = {Mon Jan 15 00:00:00 EST 2007},
month = {Mon Jan 15 00:00:00 EST 2007}
}