Neutral-kaon system in dense matter and heavy-ion collisions

Giovanni Amelino-Camelia, Joseph Kapusta

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


Above a critical matter density the propagating modes of the neutral kaon system are essentially agenstates of strangeness, but below it they are almost complete agenstates of CP. We estimate the real and imaginary parts of the energies of these modes and their mixing at all densities up to a nuclear matter density of 2 × 1014 g/cm3. I n a heavy-ion collision the strong interactions create eigenstates of strangeness, and these propagate adiabatically until the density has fallen to the critical value, whereupon the system undergoes a sudden transition to (near) agenstates of CP. We esti mate the critical density to be 20 g/cm3, and that this density will be reached about 2 × 105 fm/c after the end of the collision.

Original languageEnglish (US)
Pages (from-to)291-296
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1-4
StatePublished - 1999

Bibliographical note

Funding Information:
We thank U. Heinz and P.J. Ellis for useful conversations. J.K. thanks the Institute of Technology at the University of Minnesota for granting a single quarter leave in the spring of 1999 and the Theory Division at CERN for hospitality and support during that time. This work was supported by the US Department of Energy under grant DE-FG02-87ER40328 and by the European Union under a TMR grant.


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