Pion production in high-energy nucleus-nucleus collisions

Harris, J. W.; Odyniec, G.; Hg, Pugh; Ls, Schroeder; Ml, Tincknell; Rauch, W.; Stock, R.; Bock, R.; Brockmann, R.; Sandoval, A.; Ströbele, H.; Re, Renfordt; Schall, Daniel; Bangert, D.; Jp, Sullivan; Kl, Wolf; Dacal, A.; Guerra, C.; Me, Ortíz

doi:10.1103/physrevlett.58.463

Cited by 113 publications

(43 citation statements)

References 19 publications

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“…The rate of ∆ production grows rapidly with bombarding energy in the range 400 to 1000 MeV per nucleon, as evident from measured pion yields [60,61].…”

Section: Model Calculationsmentioning

confidence: 99%

Universality of spectator fragmentation at relativistic bombarding energies

et al. 1996

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Multi-fragment decays of 129 Xe, 197 Au, and 238 U projectiles in collisions with Be, C, Al, Cu, In, Au, and U targets at energies between E/A = 400 MeV and 1000 MeV have been studied with the ALADIN forward-spectrometer at SIS. By adding an array of 84 SiCsI(Tl) telescopes the solid-angle coverage of the setup was extended to θ lab = 16 • . This permitted the complete detection of fragments from the projectile-spectator source.The dominant feature of the systematic set of data is the Z bound universality that is obeyed by the fragment multiplicities and correlations. These observables are invariant with respect to the entrance channel if plotted as a function of Z bound , where Z bound is the sum of the atomic numbers Z i of all projectile fragments with Z i ≥ 2. No significant dependence on the bombarding energy nor on the target mass is observed. The dependence of the fragment multiplicity on the projectile mass follows a linear scaling law.The reasons for and the limits of the observed universality of spectator fragmentation are explored within the realm of the available data and with model studies. It is found that the universal properties should persist up to much higher bombarding energies than explored in this work and that they are consistent with universal features exhibited by the intranuclear cascade and statistical multifragmentation models.

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“…The rate of ∆ production grows rapidly with bombarding energy in the range 400 to 1000 MeV per nucleon, as evident from measured pion yields [60,61].…”

Section: Model Calculationsmentioning

confidence: 99%

Universality of spectator fragmentation at relativistic bombarding energies

et al. 1996

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show abstract

“…The importance of the high temperature component was found to increase with bombarding energy [2] and with the mass [1,2]. These results have been interpreted [1,2] as showing two sources for the pions, to wit: a component originating from the decay of the .6. resonance, which is dominant at low pion energies, and a component arising from a thermal pion gas.…”

Section: Introductionmentioning

confidence: 78%

“…The collisions had been triggered for high multiplicity or central events. The data show a concave shape of the spectra and have been fitted with a superposition of two Boltzmann distributions [1,2]; the temperatures for the two distributions differ widely by roughly a factor of two. The importance of the high temperature component was found to increase with bombarding energy [2] and with the mass [1,2].…”

Section: Introductionmentioning

confidence: 97%

“…The data show a concave shape of the spectra and have been fitted with a superposition of two Boltzmann distributions [1,2]; the temperatures for the two distributions differ widely by roughly a factor of two. The importance of the high temperature component was found to increase with bombarding energy [2] and with the mass [1,2]. These results have been interpreted [1,2] as showing two sources for the pions, to wit: a component originating from the decay of the .6. resonance, which is dominant at low pion energies, and a component arising from a thermal pion gas.…”

Section: Introductionmentioning

confidence: 97%

“…Recently, exclusive pion spectra have been measured in heavy ion collisions for born-I barding energies between 500 and 1800 MeV /nucleon [1,2]. The collisions had been triggered for high multiplicity or central events.…”

Section: Introductionmentioning

confidence: 99%

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