Hadronization model for quark-gluon plasma in ultra-relativistic collisions (English)

National licence
In: Zeitschrift für Physik C Particles and Fields   ;  27 ,  1  ;  135-144  ;  1985

Abstract We propose a model for the expansion and hadronization of small droplets of quark-gluon plasma assumed to be produced in ultra-relativistic collisions of hadrons and/or nuclei, and we discuss its experimental consequences. The deconfinement transition is described in terms of formation of QCD strings in the expanding plasma droplet, the string tension stopping the expansion and string breaking leading to possible subdivision of the droplet into smaller ones. The bulk of plasma hadronization is predicted to occur by deflagration of the plasma droplets at transition, through their outer surface and with ejection of low pressure hadron gas. In the rapidity distributiondn/dy of hadrons, this predicts isolated maxima of width δy∼1 or high bumpy regions a few units of rapidity wide, on an event-by-event basis, the corresponding particles having larger than normal transverse momentum. It is in these rapidity intervals that one expects the “traditional” signals for plasma formation (direct dileptons, direct photons, strange particles). We review possible evidence for plasma formation in existing cosmic ray and hadron collider data. Although it appears to be inconclusive, the observed features of the rapidity distribution and the estimated energy densities in the central region are quite encouraging for a systematic search using all proposed signals.

Table of contents – Volume 27, Issue 1

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Inclusive γ-production in $$\bar pp$$ 1interactions at 12 GeV/c
Chakrabarti, S. / Banerjee, S. / Ganguli, S. N. / Gurtu, A. / Malhotra, P. K. / Raghavan, R. / Shankar, K. / Subramanian, A. / Sudhakar, K. | 1985
InclusiveK s /0 , Λ and $$\bar \Lambda $$ production in 360 GeV/cp p interactions using the European hybrid spectrometer
Asai, M. / Bailly, J. L. / Banerjee, S. / Bruyant, F. / Bugg, W. M. / Caso, C. / Dibon, H. / Marco, R. / Emura, T. / Epp, B. et al. | 1985
Study of ππ0 production by pions in the nuclear Coulomb field at threshold
Antipov, Y. M. / Batarin, V. A. / Bessubov, V. A. / Budanov, N. P. / Gorin, Y. P. / Gornushkin, Y. A. / Denisov, S. P. / Klimenko, S. V. / Kotov, I. V. / Kulinich, P. A. et al. | 1985
A detailed study of strange particle production ine + e − annihilation at high energy
Althoff, M. / Braunschweig, W. / Kirschfink, F. J. / Lübelsmeyer, K. / Martyn, H. -U. / Rosskamp, P. / Schmitz, D. / Siebke, H. / Wallraff, W. / Eisenmann, J. et al. | 1985
Prompt electron production ine + e − annihilations at 29 GeV
Aihara, H. / Alston-Garnjost, M. / Badtke, D. H. / Bakken, J. A. / Barbaro-Galtieri, A. / Barnes, A. V. / Barnett, B. A. / Blumenfeld, B. J. / Bross, A. D. / Buchanan, C. D. et al. | 1985
TheK 0/π- ratio and strangeness supression inv p and $$\bar vp$$ charged current interactions
Jones, G. T. / Kennedy, B. W. / O'Neale, S. W. / Böckmann, K. / Gebel, W. / Geich-Gimbel, C. / Nellen, B. / Cooper-Sarkar, A. M. / Grant, A. / Klein, H. et al. | 1985
Search for muon neutrino and antineutrino oscillations in the mass range 15<�Δm 2<1,000 eV2/c4
Stockdale, I. E. / Bodek, A. / Borcherding, F. / Giokaris, N. / Lang, K. / Garfinkle, D. / Merritt, F. S. / Oreglia, M. / Reutens, P. / Auchincloss, P. S. et al. | 1985
Structure of Grassmannian σ-models
Holten, J. W. | 1985
Similarity of parton and hadron spectra in QCD jets
Azimov, Ya. I. / Dokshitzer, Y. L. / Khoze, V. A. / Trovan, S. I. | 1985
Semi-phenomenological approach to beauty-decay
Pietschmann, H. / Rupertsberger, H. | 1985
Violation of Feynman scaling in yields of hadron beam fragments at superhigh energies in the additive quark model
Anisovich, V. V. / Braun, V. M. / Shabelski, Y. M. | 1985
Secondary particle spectra in hadron-hadron and hadron-nucleus collisions in the framework of the additive quark model and quark statistics
Anisovich, V. V. / Kobrinsky, M. N. / Nyiri, J. / Shabelski, Y. M. | 1985
Once more on search forq 2 q −2-states in photon-photon collisions
Achasov, N. N. / Devyanin, S. A. / Shestakov, G. N. | 1985
The nonabelian structure of QCD in quarkonium decays
Streng, K. H. | 1985
On the existence of characteristic functions in quantum field theory
Petermann, A. | 1985
Semileptonic ΔS=1 decays of baryons with boosted bags
Eeg, J. O. / Lie-Svendsen, Ø. | 1985
Consistent and effective solutions of the two-loop evolution equations in bjorken-x space
Drees, M. | 1985
On multiplicity distributions and a pressure ensemble
Mrowczyński, Stanisŀaw | 1985
Hadronization model for quark-gluon plasma in ultra-relativistic collisions
Hove, L. | 1985
Mass gaps for theZ 2 andU(1) lattice gauge models in (2+1)D
Hamer, C. J. / Irving, A. C. | 1985
QED radiative corrections and radiative decays of the intermediate weak bosons produced in proton-antiproton collisions
Berends, F. A. / Kleiss, R. / Revol, J. P. / Vialle, J. P. | 1985