1 / 12

Oscillations of the quark-gluon plasma

Oscillations of the quark-gluon plasma. or. from oscillations to fast thermalization. Wojciech Florkowski. dedicated to Professor Andrzej Białas on the occasion of His 70-th birthday. 1. Development of the color-flux-tube model by Białas and Czyż.

xena-henry
Download Presentation

Oscillations of the quark-gluon plasma

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Oscillations of the quark-gluon plasma or from oscillations to fast thermalization Wojciech Florkowski dedicated to Professor Andrzej Białas on the occasion of His 70-th birthday

  2. 1. Development of the color-flux-tube model by Białas and Czyż color-flux-tube model: Casher, Neuberger, Nussinov, PR D20 (1979) 179 development by Białas and Czyż in the series of papers published in the 1980s

  3. - A. Białas and W. Czyż, Boost-invariant Boltzmann-Vlasov equations for relativistic quark-antiquark plasma, Phys. Rev. D30 (1984) 2371 • - A. Białas and W. Czyż, Chromoelectric flux tubes and the transverse momentum distribution in high-energy nucleus-nucleus collisions, Phys. Rev. D31 (1985) 198 • - A. Białas and W. Czyż, Oscillations of relativistic, boost-invariant quark-antiquark plama, Z. Phys. C28 (1985) 255 • - A. Białas and W. Czyż, Conversion of color field into q anti-q matter in the central region of high-energy heavy-ion collisions, Nucl. Phys. B267 (1986) 242 • A. Białas and W. Czyż, Production and collective motion of q anti-q plasma in heavy-ion collisions, Acta Phys. Pol. B17 (1986) 635 • and more others ...

  4. chromoelectric fields stronger than in „elementary” e+ e- annihilations • Biro, Nielsen, Knoll, Nucl. Phys. B245 (1984) 449 • (increased multiplicity, increased production of strange particles) • oscillations of the quark-antiquark plasma • fast (t0<1 fm/c) production of dense matter k number of color charges q which span the initial field, g coupling constant

  5. A. Białas, W. Czyż, A. Dyrek, and WF, Oscillations of quark-gluon plasma generated in strong color fields, Nucl. Phys. B296 (1988) 611 time dependence of the chromoelectric field (LHS) and the energy density of quarks and gluons (RHS) for various values of the parameter k

  6. time dependence of the average transverse (LHS) and longitudinal (RHS) momentum of quarks and gluons for various values of the parameter k [8 gluon fields are separated into 2 „neutral fields” (chromoelectric field E3 , E8) and 6 „charged gluons” (treated as particles together with quarks)]

  7. A. Dyrek and WF, Production of heavy quarks in strong chromoelectric fields, Nuovo Cim. A102 (1989) 1013 the ratio of strange quarks to up and down quarks quantitatively similar results to those obtained by P. Koch, B. Muller, and J. Rafelski, Phys. Rep. 142 (1986) 167

  8. 2. Early-thermalization in relativistic heavy-ioncollisions • the data collected at RHIC suggest that matter is well thermalized and exhibits collective behavior (bound states above TC, Shuryak; plasma instabilities, Mrówczyński; Hawking-Unruh effect, Kharzeev) • 2) already in more elementary collisions we observe thermal features, Boltzmann distributions in transverse momentum, Hagedorn, 1960s • A. Białas, Fluctuations of string tension and transverse-mass distribution Phys. Lett. B31 (1999) 301 gaussian fluctuations of the string tension can account for the „thermal” distribution of transverse mass of particles created in decay of a color string

  9. the measured transverse-momentum spectra have thermal (exponential) shape, Hagedorn, 1960s string models of hadronic collisions use the Schwinger formula Białas: appropriate averaging over κ may produce an exponential function fluctuations may appear due to stochastic nature of the QCD vacuum (H.G. Dosch, Yu. A. Simonov)

  10. my personal follow-up of this idea, WF, Schwinger tunneling and thermal character of hadron spectra, Acta Phys. Pol. B35 (2004) 799 quark spectra in the color-flux tube model are exponential due to the dynamic oscillations of the chromoelectric field E

  11. oscillations in varying chromoelectric fields may explain the origin of the thermal spectra in heavy-ions but this effect is not capable of describing thermal features observed in elementary processes it is conceivable, however, that the effect of the stochastic vacuum plays an additional role in heavy-ion collisions leading to even more pronounced thermalization effects

  12. Instead of Conclusions ... Drogi Panie Profesorze! z okazji tego Jubileuszu proszę przyjąć najserdeczniejsze życzenia wielu lat zdrowia i pomyślności, a także podziękowania za wszystkie naukowe inspiracje

More Related