### Abstract

Using the lattice QCD equation of state for an isentropically expanding fireball we follow the evolution of the effective number of particles in an ideal gas, N_{eff} = p V / T. This number reduces to its third around the crossover temperature, which helps to resolve the entropy problem inherent in hadronization models assuming quark coalescence.

Original language | English |
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Pages (from-to) | 193-196 |

Number of pages | 4 |

Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |

Volume | 650 |

Issue number | 2-3 |

DOIs | |

Publication status | Published - Jun 28 2007 |

### ASJC Scopus subject areas

- Nuclear and High Energy Physics

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## Cite this

Biró, T. S., & Zimányi, J. (2007). Entropy of expanding QCD matter.

*Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics*,*650*(2-3), 193-196. https://doi.org/10.1016/j.physletb.2007.04.057