# Quark Matter 2014 - XXIV International Conference on Ultrarelativistic Nucleus-Nucleus Collisions

19-24 May 2014
darmstadtium
Europe/Zurich timezone

## The velocity of pions in the low-temperature phase of QCD

20 May 2014, 16:30
2h
spectrum (darmstadtium)

### spectrum

#### darmstadtium

Board: A-19
Poster QCD at High Temperature and/or Density

### Speaker

Mr Daniel Robaina (Institute of Nuclear Physics, University of Mainz)

### Description

The dispersion relation of the pion quasiparticle is calculated in the confined phase of QCD with two light flavors of quarks using lattice simulations. In the hadron gas, the would-be diffusion pole of the axial charge density and the Goldstone boson of chiral symmetry breaking "mix"; as a result, a single light quasiparticle emerges whose dispersion relation can be determined from equilibrium quantities (D.T. Son and M. Stephanov, Phys. Rev. D66 (2002) 076011). Results are presented for temperatures between $0.7T_c$ and $T_c$.

### Primary author

Mr Daniel Robaina (Institute of Nuclear Physics, University of Mainz)

### Co-authors

Dr Anthony Francis (Institute of Nuclear Physics, University of Mainz) Dr Bastian B. Brandt (University of Regensburg) Prof. Harvey B. Meyer (Institute of Nuclear Physics, University of Mainz)

### Presentation Materials

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