Pion-production in heavy-ion collisions at SIS energies

Teis, S.; Cassing, W.; Effenberger, M.; Hombach, A.; Mosel, U.; Wolf, Gy.

doi:10.1007/bf02769248

Cited by 107 publications

(290 citation statements)

References 26 publications

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“…[23], extended with recent HADES results [16]) is depicted in Fig. 6, as well as the corresponding resonance model calculation of Teis et al [30]. Assuming that η production is mediated solely by the N * (1535) resonance, the latter gives a reasonable description of the data.…”

Section: -5supporting

confidence: 65%

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Inclusive dielectron production in proton-proton collisions at 2.2 GeV beam energy

Agakishiev¹,

Álvarez‐Pol²,

Bałanda³

et al. 2012

Phys. Rev. C

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Data on inclusive dielectron production are presented for the reaction p + p at 2.2 GeV measured with the high acceptance dielectron spectrometer (HADES). Our results supplemented data obtained earlier in this bombarding energy regime with the dilepton spectrometer (DLS) and HADES. The comparison with the 2.09 GeV DLS data is discussed. The reconstructed e + e − pair distributions are confronted with simulations, revealing an excess yield at invariant masses around 0.5 GeV/c 2 . Inclusive cross sections of neutral pion and η production are obtained.

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Section: -5supporting

confidence: 65%

“…[16]. The short-dashed curve corresponds to the resonance model [30], and the dot-dashed curve is the parametrization of inclusive η production from Ref. [31].…”

Section: Inclusive Meson Productionmentioning

confidence: 99%

Inclusive dielectron production in proton-proton collisions at 2.2 GeV beam energy

Agakishiev¹,

Álvarez‐Pol²,

Bałanda³

et al. 2012

Phys. Rev. C

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“…In JAM, cross sections of various resonance formation in BB are parameterized to reproduce pion multiplicities. In UrQMD, 135) BUU, 160) matrix elements are fitted to the available data for pion production cross sections. The cross section for the inverse process such as h * 1 h * 2 → h 1 h 2 can be obtained by the detailed balance formula 158), 161), 162) which takes the finite width of the resonance mass into account.…”

Section: Resonance Productionsmentioning

confidence: 99%

Dynamical modeling of high energy heavy ion collisions

Hirano

Nara

2012

Progress of Theoretical and Experimental Physics

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We present theoretical approaches to high energy nuclear collisions in detail putting a special emphasis on technical aspects of numerical simulations. Models include relativistic hydrodynamics, Monte-Carlo implementation of kT -factorization formula, jet quenching in expanding fluids, a hadronic transport model and the Vlasov equation for colored particles. §1. IntroductionOne of the primary purposes of heavy ion physics at ultrarelativistic energies is to explore properties of strongly interacting matter at high temperature and densities, namely, the quark gluon plasma (QGP). 2), 3), 1) To this purpose, collider experiments of high energy pp, dA and AA collisions have been performed at both Relativistic Heavy Ion Collider (RHIC) in Brookhaven National Laboratory (BNL) and Large Hadron Collider (LHC) in European Organization for Nuclear Research (CERN). It is of particular importance to comprehensively understand space-time evolution of matter created in high energy heavy ion collisions so that one can extract information on the detailed properties of matter from experimental data.High energy nuclear collisions contain rich physics and exhibit many aspects of dynamics according to relevant energy and time scales. Collisions of two energetic nuclei can be viewed as those of highly coherent dense gluons. Universal behaviors of hadrons and nuclei at the high energy limit are called the color glass condensate (CGC). 4) Just after the collision, longitudinal color electric and magnetic fields between the two passing nuclei, which is called color flux tubes, 5) are produced from CGC initial conditions. Subsequent evolution of these flux tubes is called "glasma". 6) Long range rapidity correlations in the glasma 7), 8), 9) provide a natural explanation for the ridge structure observed at RHIC 10), 11) and LHC. 12) It was pointed out that instabilities of the gluon fields could play a significant role in the process of thermalization. 13), 14), 15)A model based on k T -factorization formula 20), 21), 16), 17), 18), 19), 22), 24), 23) or classical Yang-Mills approach 25), 26) reproduces the multiplicity distribution for charged hadrons at RHIC and LHC. However, initial transverse energy per particle is large compared with the experimental data. 27), 26), 24) Glasma evolution based on a 2+1 dimensional classical Yang-Mills simulation does not account for elliptic flow data at RHIC. 28) These facts suggest the necessity of inclusion of further evolution with much stronger interaction, e.g., hydrodynamical evolution. Indeed, a nearly perfect fluid picture 29), 30), 31), 32), 33) turns out to explain large elliptic flow 34) observed at RHIC 35), 36), 37) and LHC, 38), 39), 40) which leads to establishment of a new paradigm typeset using PTPT E X.cls Ver.0.9

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“…[35,36]. This model is based on the resonance concept of nucleon-nucleon and meson-nucleon interactions at low invariant energy √ s [37] by adopting all resonance parameters from the Manley analysis [38]; all states with at least 1 For a detailed description of the individual channels we refer the reader to Ref. [33].…”

Section: Resonance Approachmentioning

confidence: 99%

“…It has been shown, that the resonance model provides a good description of the experimental data on one-and two-pion production in nucleon-nucleon collisions at low energy [37]. However, with increasing energy the resonance contributions underestimate the data; the missing yield is then treated as a backgraund term to the resonance amplitude.…”

Section: Resonance Approachmentioning

confidence: 99%

Perspectives of production in , and Be reactions at SIS energies

2001

Self Cite

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We study dilepton production from pp, pd and pBe collisions from 1 -5 GeV including the π 0 , η, ω and ∆ Dalitz decays, direct decays of vector mesons (ρ, ω) as well as subthreshold ρ production via baryonic resonances (e.g. D 13 (1520), P 11 (1710)). Our calculations compare rather well with the pp and pd data from the DLS Collaboration, however, overestimate slightly the 'old' pBe data from that group. Futhermore, detailed predictions for differential dilepton spectra at SIS energies are made with a high mass resolution that can be controlled experimentally by the HADES Collaboration in near future.

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Pion-production in heavy-ion collisions at SIS energies

Cited by 107 publications

References 26 publications

Inclusive dielectron production in proton-proton collisions at 2.2 GeV beam energy

Inclusive dielectron production in proton-proton collisions at 2.2 GeV beam energy

Dynamical modeling of high energy heavy ion collisions

Perspectives of production in , and Be reactions at SIS energies

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