Analysis of pion production data measured by HADES in proton-proton collisions at 1.25 GeV

Agakishiev, G.; Bałanda, A.; Belver, D.; Belyaev, A.; Berger-Chen, J. C.; Blanco, A.; Böhmer, M.; Boyard, J. L.; Cabanelas, P.; Chernenko, S.; Dybczak, A.; Epple, E.; Fabbietti, L.; Fateev, O.; Finocchiaro, P.; Fonte, P.; Friese, J.; Fröhlich, I.; Galatyuk, T.; Garzón, J. A.; Gernhäuser, R.; Göbel, K.; Golubeva, M.; (I~Attani), D.; Guber, F.; Gumberidze, M.; Heinz, T.; Hennino, T.; Holzmann, R.; Ierusalimov, A.; Iori, I.; Ivashkin, A.; Jurković, M.; Kämpfer, B.; Karavicheva, T.; Köenig, I.; Koenig, W.; Kolb, B. W.; Kornakov, G.; Kötte, R.; Krása, A.; Křížek, F.; Krücken, R.; Kuc, H.; Kühn, W.; Куглер, А.; Kurepin, A.; Ladygin, V. P.; Lalik, R.; Lang, S.; Lapidus, K.; Lebedev, A.; Liu, T.; Lopes, L.; Lorenz, M.; Maier, L.; Mangiarotti, A.; Markert, J.; Metag, V.; Michalska, B.; Michel, J.; Müntz, C.; Münzer, Robert Helmut; Naumann, L.; Pachmayer, Y.; Pałka, M.; Parpottas, Y.; Pechenov, V.; Pechenova, O.; Pietraszko, J.; Przygoda, W.; Ramstein, B.; Reshetin, A.; Rustamov, A.; Sadovsky, A.; Salabura, P.; Schmah, A.; Schwab, E.; Siebenson, J.; Sobolev, Yu. G.; Spataro, S.; Spruck, B.; Ströbele, H.; Stroth, J.; Sturm, C.; Tarantola, A.; Teilab, K.; Tlustý, P.; Traxler, M.; Trębacz, R.; Tsertos, H.; Vasiliev, T.; Wagner, V.; Weber, M.; Wendisch, C.; Wüstenfeld, J.; Yurevich, S.; Zanevsky, Y.; Sarantsev, A.; Nikonov, V. A.

doi:10.1140/epja/i2015-15137-5

Cited by 42 publications

(43 citation statements)

References 49 publications

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“…The Beam Energy Scan (BES) program of RHIC [10] is currently investigating the location of the critical point [11]. The HADES experiment at GSI, Darmstadt is investigating a medium with very large baryon chemical potential [12]. In future, the Compressed Baryonic Matter (CBM) experiment [13] at the Facility for Antiproton and Ion Research (FAIR) at GSI and the Nuclotron-based Ion Collider fAcility (NICA) [14] at JINR, Dubna will also study nuclear matter at large baryon chemical potential.…”

Section: Introductionmentioning

confidence: 99%

Criticality in a hadron resonance gas model with the van der Waals interaction

Samanta

Mohanty

2018

Phys. Rev. C

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The van der Waals interaction is implemented in a Hadron Resonance Gas model. It is shown that this model can describe Lattice QCD data of different thermodynamical quantities satisfactorily with the van der Waals parameters a = 1250 ± 150 MeV fm 3 and r = 0.7 ± 0.05 fm. Further, a liquid-gas phase transition is observed in this model with the critical point at temperature, T = 62.1 MeV and baryon chemical potential, µ B = 708 MeV.

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Section: Introductionmentioning

confidence: 99%

Criticality in a hadron resonance gas model with the van der Waals interaction

Samanta

Mohanty

2018

Phys. Rev. C

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“…This result was obtained using the hyperon production cross sections reduced by a factor of 0.75, as described in the previous Section. The Λ + Σ 0 multiplicity is still above (though within the error of) the experimental value of 0.017±0.003 obtained by HADES [28]. The squared matrix element of Y * production has been chosen to reproduce the experimental Ξ − yield of 2.0 × 10 −4 obtained by the HADES collaboration in p+Nb collisions.…”

Section: Resultsmentioning

confidence: 89%

“…The HADES collaboration has measured the yield of the doubly strange Ξ − baryon in p+Nb collisions at the subthreshold energy of √ s NN = 3.2 GeV [1], and in Ar+KCl collisions at the deeply subthreshold energy of √ s NN = 2.61 GeV [2]. They also performed a statistical model analysis of the obtained Ξ − yields along with their results for π, η, Λ, kaon, ω and φ multiplicities in the same reactions [3]. They found that the THERMUS statistical model gives a good description of all particle yields except for that of the Ξ − baryon, which the model underestimates by a factor 15 in the case of the reaction Ar+KCl and by a factor 8 in the case of the reaction p+Nb.…”

Section: Introductionmentioning

confidence: 99%

Influence of anisotropic Λ/Σ creation on the Ξ− multiplicity in subthreshold proton–nucleus collisions

Zétényi

Wolf

2018

Physics Letters B

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We present an analysis of Ξ − baryon production in subthreshold proton-nucleus (p + A) collisions in the framework of a BUU type transport model. We propose a new mechanism for Ξ production in the collision of a secondary Λ or Σ hyperon and a nucleon from the target nucleus. We find that the Ξ − multiplicity in p + A collisions is sensitive to the angular distribution of hyperon production in the primary N + N collision. Using reasonable assumptions on the unknown elementary cross sections we are able to reproduce the Ξ − multiplicity and the Ξ − /(Λ + Σ 0 ) ratio obtained in the HADES experiment in p+Nb collisions at √ s NN = 3.2 GeV energy.

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“…The Beam Energy Scan (BES) program of RHIC [10] is currently investigating the matter at large baryon chemical potential and the location of the critical point [11]. The HADES experiment at GSI, Darmstadt is also investigating a medium with very large baryon chemical potential [12]. In future, the Compressed Baryonic Matter (CBM) experiment [13] at the Facility for Antiproton and Ion Research (FAIR) at GSI and the Nuclotron-based Ion Collider fAcility (NICA) [14] at JINR, Dubna will study nuclear matter at large baryon chemical potential.…”

Section: Introductionmentioning

confidence: 99%

Interacting hadron resonance gas model in the K -matrix formalism

2018

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An extension of Hadron Resonance Gas (HRG) model is constructed to include interactions using relativistic virial expansion of partition function. The non-interacting part of the expansion contains all the stable baryons and mesons and the interacting part contains all the higher mass resonances which decay into two stable hadrons. The virial coefficients are related to the phase shifts which are calculated using K-matrix formalism in the present work. We have calculated various thermodynamics quantities like pressure, energy density, and entropy density of the system. A comparison of thermodynamic quantities with non interacting HRG model, calculated using the same number of hadrons, shows that the results of above formalism are larger. A good agreement between equation of state calculated in K-matrix formalism and lattice QCD simulations is observed. Specifically the lattice QCD calculated interaction measure is well described in our formalism. We have also calculated second order fluctuations and correlations of conserved charges in K-matrix formalism. We observe a good agreement of second order fluctuations and baryon-strangeness correlation with lattice data below the cross-over temperature.

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Analysis of pion production data measured by HADES in proton-proton collisions at 1.25 GeV

Cited by 42 publications

References 49 publications

Criticality in a hadron resonance gas model with the van der Waals interaction

Criticality in a hadron resonance gas model with the van der Waals interaction

Influence of anisotropic Λ/Σ creation on the Ξ− multiplicity in subthreshold proton–nucleus collisions

Interacting hadron resonance gas model in the K -matrix formalism

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