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High-energy physics

An emptier emptiness?

Temperatures similar to those reached an instant after the Big Bang can be created in collisions of gold atoms. The resulting fireballs may allow us a glimpse of a world that is more symmetrical than our own.

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Figure 1: Gold dust.


  1. Cramer, J., Miller, G., Wu, J. & Yoon, J. -H. preprint at (2004).

  2. Kolb, P. F. & Heinz, U. in Quark Gluon Plasma Vol. 3 (eds Hwa, R. C. & Wang, X.-N.) (World Scientific, Singapore, 2004); preprint at (2003).

    Google Scholar 

  3. Adcox, K. et al. (The PHENIX collaboration) Nucl. Phys. A (submitted); preprint at (2005).

  4. Adams, J. et al. (The STAR collaboration) Nucl. Phys. A (submitted); preprint at (2005).

  5. Back, B. B. et al. (The PHOBOS collaboration) Nucl. Phys. A (in the press); doi:10.1016/j.nuclphysa.2005.03.084 (2005).

  6. Arsene, I. et al. (The BRAHMS collaboration) Nucl. Phys. A (in the press); doi:10.1016/j.nuclphysa.2005.02.130 (2005).

  7. Heinz, U. W. & Kolb, P. F. preprint at (2002).

  8. Son, D. T. & Stephanov, M. A. Phys. Rev. D 66, 076011 (2002).

    ADS  Article  Google Scholar 

  9. Son, D. T. & Stephanov, M. A. Phys. Rev. Lett. 88, 202302 (2002).

    ADS  CAS  Article  PubMed  Google Scholar 

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Wilczek, F. An emptier emptiness?. Nature 435, 152–153 (2005).

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