Production of spectator hypermatter in relativistic heavy-ion collisions

Botvina, A. S.; Gudima, K. K.; Steinheimer, Jan; Bleicher, Marcus; Mishustin, I. N.

doi:10.1103/physrevc.84.064904

Cited by 50 publications

(103 citation statements)

References 45 publications

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“…We use the Ultrarelativistic Quantum Molecular Dynamics (UrQMD) model, the Hadron String Model (HSD), the Dubna Cascade Model (DCM) as the transport approaches to simulate the initial dynamical reaction stage [9,10]. Nucleons from overlapping parts of the projectile and target (participant zone) interact strongly with each other and with hadrons produced in primary and secondary collisions.…”

Section: Modelling Production Of Hypernucleimentioning

confidence: 99%

“…As a result the produced hyperons populate the whole momentum space around the colliding nuclei, including the vicinity of nuclear spectators, and can be captured by the nuclear residues. This can be described both as the capture in a nuclear potential [9] and within a generalized coalescence model [10]. The coalescent mechanism can be applied for the formation of light clusters too.…”

Section: Modelling Production Of Hypernucleimentioning

confidence: 99%

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Processes of hypernuclei formation in relativistic ion collisions

Botvina

Bleicher

2018

EPJ Web Conf.

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Abstract. The study of hypernuclei in relativistic ion collisions open new opportunities for nuclear and particle physics. The main processes leading to the production of hypernuclei in these reactions are the disintegration of large excited hyper-residues (target-and projectile-like), and the coalescence of hyperons with other baryons into light clusters. We use the transport, coalescence and statistical models to describe the whole reaction, and demonstrate the effectiveness of this approach: These reactions lead to the abundant production of multi-strange nuclei and new hypernuclear states. A broad distribution of predicted hypernuclei in masses and isospin allows for investigating properties of exotic hypernuclei, as well as the hypermatter both at high and low temperatures. There is a saturation of the hypernuclei production at high energies, therefore, the optimal way to pursue this experimental research is to use the accelerator facilities of intermediate energies, like FAIR (Darmstadt) and NICA (Dubna).

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Section: Modelling Production Of Hypernucleimentioning

confidence: 99%

Section: Modelling Production Of Hypernucleimentioning

confidence: 99%

Processes of hypernuclei formation in relativistic ion collisions

Botvina

Bleicher

2018

EPJ Web Conf.

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“…For our predictions we use the Ultrarelativistic Quantum Molecular Dynamics (UrQMD) model, the Hadron String Model (HSD), the Dubna Cascade Model (DCM) as the transport approaches to simulate the initial dynamical reaction stage [8,9]. In the simplified picture, nucleons from overlapping parts of the projectile and target (participant zone) interact strongly with each other and with hadrons produced in primary and secondary collisions.…”

Section: Production Mechanisms For Hypernucleimentioning

confidence: 99%

“…As a result the produced hyperons populate the whole momentum space around the colliding nuclei, including the vicinity of nuclear spectators, and can be captured by the spectator residues. This can be described both as the capture in a nuclear potential [8] and within a generalized coalescence model [9]. The coalescent mechanism can be applied for the formation of light clusters too.…”

Section: Production Mechanisms For Hypernucleimentioning

confidence: 99%

Formation of Hypernuclei in Relativistic Ion Collisions

Botvina¹,

Bleicher²,

Pochodzalla³

et al. 2017

Proceedings of the 12th International Conference on Hypernuclear and Strange Particle Physics (HYP2015)

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We develop a versatile model of hypernuclei production in relativistic hadron and ion collisions. Within a hybrid approach we use transport, coalescence and statistical models to describe the whole process. We demonstrate that heavy hypernuclei are coming mostly from projectile and target residues, whereas light hypernuclei can be produced at all rapidities. The yields of hypernuclei increase considerably above the energy threshold for the hyperon production, and there is a tendency to saturation of yields of hypernuclei with increasing the beam energy. There are unique opportunities in relativistic ion collisions which are difficult to realize in traditional hypernuclear experiments: The produced hypernuclei have a broad distribution in masses and isospin, and the production of multi-strange nuclei including new excited states is quite abundant. In addition, we can directly get an information on the hypermatter both at high and low temperatures.

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“…One can discriminate two distinct mechanisms for hypercluster formation in heavy ion collisions. First, the absorption of hyperons in the spectator fragments of non central collisions [41,42,43,44]. The hyper-systems obtained here are rather large and moderately excited, decaying into hyper fragments later on [44,45].…”

Section: Hypernucleimentioning

confidence: 99%

Strangeness in Quark Matter: Opening Talk

Steinheimer

Lang

Hees

et al. 2014

J. Phys.: Conf. Ser.

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Abstract. We discuss several new developments in the field of strange and heavy flavor physics in high energy heavy ion collisions. As shown by many recent theoretical works, heavy flavored particles give us a unique opportunity to study the properties of systems created in these collisions. Two in particular important aspects, the production of (multi) strange hypernuclei and the properties of heavy flavor mesons, are at the core of several future facilities and will be discussed in detail.As strange quarks have to be newly produced during the hot and dense stage of a relativistic nuclear collision, they carry information, on the properties of the matter that was created [1,2,3,4], to the observed final particle state. The enhancement of strange particle production is discussed [5,6,7,8,9] as a possible signal for the creation of a deconfined phase. Recently several observables, regarding strange and charm quarks have shown the importance of understanding the dynamics of strangeness and charm production in heavy ion collisions:• Strange particle ratios and yields from the ALICE collaboration may indicate that there is either no unique chemical freeze out point for strange an non-strange particles [10,11,12,13], or the light quark phase space is severely over-saturated [14].• Lattice calculations on the stability of the H-dibaryon indicate it might be either very loosely bound or a resonant state [15,16,17].• Viscous hydrodynamics, with fluctuating initial conditions [18] and finite but small viscous corrections, seems to describe strange hadron observables even at large baryon densities [19,20].• The hydrodynamic model calculations show sensitivity on the life time of the system and the applied equation of state [21].• There are indications that systems created in high energy p+p and p+Pb collisions can thermalize/equilibrate to a certain degree and show signs of collectivity [22,23,24,25].• A polarization of Λ's due to the finite angular momentum of the fireball is expected [26].

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Production of spectator hypermatter in relativistic heavy-ion collisions

Cited by 50 publications

References 45 publications

Processes of hypernuclei formation in relativistic ion collisions

Processes of hypernuclei formation in relativistic ion collisions

Formation of Hypernuclei in Relativistic Ion Collisions

Strangeness in Quark Matter: Opening Talk

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