# QM 2011 - XXII International Conference on Ultrarelativistic Nucleus-Nucleus Collisions

May 22 – 28, 2011
Centre Bonlieu
Europe/Zurich timezone

## The phase diagram in T-mu-Nc space

Not scheduled
Théâtre National (Centre Bonlieu)

### Théâtre National

#### Centre Bonlieu

France
Board: 131
Poster QCD phase diagram

### Speaker

Giorgio Torrieri (JW Goethe Universitat, Frankfurt)

### Description

We argue that a so far neglected dimensionless scale, the number of neighbors in a closely packed system (Nn, Nn~10 in our world), is relevant for the convergence of the large number of colors (Nc, Nc=3 in our world) expansion at large chemical potential. Using a highly simplified but universal model, we demonstrate that the Nc$\gg$Nn limit is qualitatively different from our world's Nc$\ll$Nn. In particular, the relationship between deconfinement and percolation, and the in-medium modification of baryonic wavefunctions, are very different in these two regimes. We explore phenomenological consequences of these findings, particularly in regard to the new "Quarkyonic" phases conjectured from large Nc arguments and the problem of chiral symmetry breaking at high chemical potential Based on developments from Phys.Rev.C82:055202,2010 and http://arxiv.org/abs/1103.4824

### Primary author

Giorgio Torrieri (JW Goethe Universitat, Frankfurt)

### Co-authors

Prof. Igor Mishustin (FIAS) Dr Stefano Lottini (FIAS)

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