Preferential emission of pions in asymmetric nucleus-nucleus collisions

Li, Bao An; Bauer, Wolfgang; Bertsch, G. F.

doi:10.1103/physrevc.44.2095

Cited by 86 publications

(80 citation statements)

References 15 publications

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“…employed in ref. [207,208] is a rough estimate of the nucleonic freeze out time (while in our approach the actual time (event by event) for pion freeze out is employed): The densities in the collision center are then already far lower than ground state density.…”

Section: Temperatures and Single Particle Spectramentioning

confidence: 99%

Microscopic models for ultrarelativistic heavy ion collisions

Bass

Weber

Hartnack

et al. 1998

Progress in Particle and Nuclear Physics

1,784

784

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Section: Temperatures and Single Particle Spectramentioning

confidence: 99%

Microscopic models for ultrarelativistic heavy ion collisions

Bass

Weber

Hartnack

et al. 1998

Progress in Particle and Nuclear Physics

1,784

784

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“…In heavy-ion collisions at beam energies below about 1 GeV/nucleon, most pions are produced through the decay of ∆(1232) resonances, see, e.g., Refs. [566,567]. The mean-field potentials for ∆(1232) resonances in nuclear matter are still largely unknown.…”

Section: Thementioning

confidence: 99%

Recent progress and new challenges in isospin physics with heavy-ion reactions

2008

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The ultimate goal of studying isospin physics via heavy-ion reactions with neutron-rich, stable and/or radioactive nuclei is to explore the isospin dependence of in-medium nuclear effective interactions and the equation of state of neutron-rich nuclear matter, particularly the isospin-dependent term in the equation of state, i.e., the density dependence of the symmetry energy. Because of its great importance for understanding many phenomena in both nuclear physics and astrophysics, the study of the density dependence of the nuclear symmetry energy has been the main focus of the intermediate-energy heavy-ion physics community during the last decade, and significant progress has been achieved both experimentally and theoretically. In particular, a number of phenomena or observables have been identified as sensitive probes to the density dependence of the nuclear symmetry energy. Experimental studies have confirmed some of these interesting isospin-dependent effects and allowed us to constrain relatively stringently the symmetry energy at sub-saturation densities. The impacts of this constrained density dependence of the symmetry energy on the properties of neutron stars have also been studied, and they were found to be very useful for the astrophysical community. With new opportunities provided by the various radioactive beam facilities being constructed around the world, the study of isospin physics is expected to remain one of the forefront research areas in nuclear physics. In this report, we review the major progress achieved during the last decade in isospin physics with heavy ion reactions and discuss future challenges to the most important issues in this field.Key words: Equation of state of asymmetric nuclear matter, Nuclear symmetry energy, Heavy-ion reactions with neutron-rich nuclei, Neutron skin thickness of heavy nuclei, Neutron stars Constraining the Skyrme effective interactions and the neutron skin thickness of heavy nuclei using terrestrial nuclear laboratory data 216 8

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“…However, in Ref. [51][52][53] it was shown that the anti-correlation is a manifestation of the nuclear shadowing of the target and projectile-spectators through both pion re-scattering and reabsorptions. Quantitatively, the shadowing can produce in-plane transverse momentum components comparable to the momenta itself and, thus, much larger than components due to collective motion for pions [54].…”

Section: Directed Flow Of π − -Mesonsmentioning

confidence: 99%

Collective flows of protons andπ−mesons in2H+C,Ta and He
Chkhaidze
¹
,
Djobava
²
,
Galoyan
³

et al. 2011
Phys. Rev. C
8
0
3
1
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Abstract. Collective flows of protons and negative pions have been studied in 2 H+C, Ta and He+C, Ta collisions at energy of 3.4 GeV/nucleon. The data has been obtained by 2m Propane Bubble Chamber (PBC-500) at JINR. It is found that the directed flow of protons and π − -mesons characterized by d< P x >/d(y) increases with increase of the mass numbers of colliding nucleus pairs; the elliptic proton flow points out of the reaction plane and also strengthens as system mass increases; the negative pion directed flow is in the reaction plane as proton one for the lighter ( 2 H+C, He+C) systems and in the opposite direction for the heavier ( 2 H+Ta, He+Ta) systems. In 2 H+C, He+C, C+C, C+Ne, 2 H+Ta, He+Ta, C+Cu and C+Ta collisions, the linear dependence of directed and elliptic flow parameters from mass numbers of projectile and target nuclei ─ (A P . A T ) 1/2 , is similar for protons while for π − -mesons the dependence of directed flow parameters is stronger. The Ultra-relativistic Quantum Molecular Dynamical Model (UrQMD) enlarged by the Statistical Multi-fragmentation Model (SMM) satisfactorily describes the obtained experimental results for all pairs of nuclei. The data for such asymmetric nuclear collisions are obtained for the first time.

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Preferential emission of pions in asymmetric nucleus-nucleus collisions

Cited by 86 publications

References 15 publications

Microscopic models for ultrarelativistic heavy ion collisions

Microscopic models for ultrarelativistic heavy ion collisions

Recent progress and new challenges in isospin physics with heavy-ion reactions

Collective flows of protons andπ−mesons in2H+C,Ta and He
Chkhaidze
¹
,
Djobava
²
,
Galoyan
³

et al. 2011
Phys. Rev. C
8
0
3
1
View full text Add to dashboard Cite

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Preferential emission of pions in asymmetric nucleus-nucleus collisions

Cited by 86 publications

References 15 publications

Microscopic models for ultrarelativistic heavy ion collisions

Microscopic models for ultrarelativistic heavy ion collisions

Recent progress and new challenges in isospin physics with heavy-ion reactions

Collective flows of protons andπ−mesons in2H+C,Ta and HeChkhaidze1, Djobava2, Galoyan3 et al. 2011Phys. Rev. C8031View full textAdd to dashboardCite

Contact Info

Product

Resources

About

Collective flows of protons andπ−mesons in2H+C,Ta and He
Chkhaidze
¹
,
Djobava
²
,
Galoyan
³

et al. 2011
Phys. Rev. C
8
0
3
1
View full text Add to dashboard Cite