Probing hadronic formation times with antiprotons in p+A reactions at AGS energies

Cassing, W.; Bratkovskaya, E.L.; Hansén, O.

doi:10.1016/s0375-9474(02)00919-3

Cited by 10 publications

(12 citation statements)

References 60 publications

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“…The data for N and Kr could then be well described using a formation time τ f > 0.3fm/c for all hadrons. This value is compatible with the analysis of antiproton attenuation in p + A reactions at AGS energies [15].…”

supporting

confidence: 90%

Hadron formation in electron induced reactions at HERMES energies

Falter¹,

Cassing²,

Gallmeister³

et al. 2004

AIP Conference Proceedings

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We investigate meson electroproduction off complex nuclei in the kinematic regime of the HERMES experiment using a semi-classical transport model which is based on the Boltzmann-Uehling-Uhlenbeck (BUU) equation. We discuss coherence length and color transparency effects in exclusive rho^0 production as well as hadron formation and attenuation of charged pions, kaons, protons and anti-protons in deep inelastic lepton scattering off nuclei.Comment: 5 pages, 2 figures, to be published in the Proceedings of the "10th International Conference on Hadron Spectroscopy", Aschaffenburg, Germany, Aug. 31 - Sep. 6, 200

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supporting

confidence: 90%

Hadron formation in electron induced reactions at HERMES energies

Falter¹,

Cassing²,

Gallmeister³

et al. 2004

AIP Conference Proceedings

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“…[39,40] have demonstrated that the dominant final state interactions of the hadrons with maximum momentum, as measured by the HERMES collaboration [42], are compatible to the concepts described above. This also holds for antiproton production and attenuation in proton-nucleus collisions at AGS energies [56].…”

Section: Perturbative Treatment Of High P ⊥ Hadrons and Jetsmentioning

confidence: 79%

Jet quenching by (pre-)hadronic final state interactions at RHIC

Gallmeister

Cassing

2005

Nuclear Physics A

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Within a hadron-string dynamical transport approach (HSD) we investigate the attenuation of high transverse momentum (p ⊥ ) hadrons as well as the suppression of 'near-side' and 'far-side' jets in Au + Au collisions at invariant energies √ s = 200 GeV and √ s = 62.4 GeV in comparison to the data available from the Relativistic Heavy-Ion Collider (RHIC). From our transport studies we find that a significant part of the high p ⊥ hadron attenuation seen experimentally can be attributed to inelastic interactions of 'leading' pre-hadrons with the dense hadronic environment. In addition, we also show results of 'near-side' and 'far-side' angular correlations of high p ⊥ particles from Au+Au collisions at √ s = 200 GeV and √ s = 62.4 GeV within this (pre-)hadronic attenuation scenario. It turns out that the 'near-side' correlations are unaltered -in accordance with experiment -whereas the 'far-side' correlations are suppressed by up to ∼ 60% in central collisions. Since a much larger suppression is observed experimentally for these reactions in central reactions we conclude that there should be strong additional (and earlier) partonic interactions in the dense and possibly colored medium created in Au+Au collisions at RHIC.

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“…This finding is remarkable, since the same dynamics also describe the hadron formation and attenuation in deep-inelastic lepton scattering off nuclei at HERMES [43] quite well. Additionally, this also holds for antiproton production and attenuation in proton-nucleus collisions at AGS energies [45].…”

Section: Discussionmentioning

confidence: 94%

Suppression of high transverse momentum hadrons at RHIC by (pre-) hadronic final state interactions

2004

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We investigate transverse hadron spectra from proton+proton, deuteron+Au and Au+Au collisions at √ s = 200 GeV and √ s = 17.3 GeV within the Hadron-StringDynamics (HSD) approach which is based on quark, diquark, string and hadronic degrees of freedom as well as Pythia calculations for the high p ⊥ spectra. The comparison to experimental data on transverse mass spectra from p+p, d+Au and Au+Au reactions shows that pre-hadronic effects are responsible for both the hardening of the spectra for low transverse momenta (Cronin effect) as well as the suppression of high p ⊥ hadrons. The interactions of formed hadrons are found to be negligible in central Au+Au collisions at √ s = 200 GeV for p ⊥ ≥ 6 GeV/c, but have some importance for the shape of the ratio R AA at lower p ⊥ values (≤ 6 GeV/c). The large suppression seen experimentally is attributed to the inelastic interactions of 'leading' pre-hadrons with the dense environment, which could be partly of colored partonic nature in order to explain the large attenuation seen in most central Au+Au collisions.

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Probing hadronic formation times with antiprotons in p+A reactions at AGS energies

Cited by 10 publications

References 60 publications

Hadron formation in electron induced reactions at HERMES energies

Hadron formation in electron induced reactions at HERMES energies

Jet quenching by (pre-)hadronic final state interactions at RHIC

Suppression of high transverse momentum hadrons at RHIC by (pre-) hadronic final state interactions

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