### Abstract

We study thermodynamics of strongly coupled lattice QCD with two colors of massless staggered fermions as a function of the baryon chemical potential μ in 3+1 dimensions using a new cluster algorithm. We find evidence that the model undergoes a weak first order phase transition at μ=0 which becomes second order at a finite μ. Symmetry considerations suggest that the universality class of these phase transitions should be governed by a O(N)×O(2) field theory with collinear order, with N=3 at μ=0 and N=2 at μ≠0. The universality class of the second order phase transition at μ≠0 appears to be governed by the decoupled XY fixed point present in the O(2)×O(2) field theory. Finally we show that the quantum (T=0) phase transition as a function of μ is a second order mean field transition.

Original language | English |
---|---|

Article number | 014506 |

Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |

Volume | 74 |

Issue number | 1 |

DOIs | |

Publication status | Published - 2006 Jul 14 |

### Fingerprint

### ASJC Scopus subject areas

- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)

### Cite this

*Physical Review D - Particles, Fields, Gravitation and Cosmology*,

*74*(1), [014506]. https://doi.org/10.1103/PhysRevD.74.014506

**Phase diagram of two-color lattice QCD in the chiral limit.** / Chandrasekharan, Shailesh; Jiang, Fu Jiun.

Research output: Contribution to journal › Article

*Physical Review D - Particles, Fields, Gravitation and Cosmology*, vol. 74, no. 1, 014506. https://doi.org/10.1103/PhysRevD.74.014506

}

TY - JOUR

T1 - Phase diagram of two-color lattice QCD in the chiral limit

AU - Chandrasekharan, Shailesh

AU - Jiang, Fu Jiun

PY - 2006/7/14

Y1 - 2006/7/14

N2 - We study thermodynamics of strongly coupled lattice QCD with two colors of massless staggered fermions as a function of the baryon chemical potential μ in 3+1 dimensions using a new cluster algorithm. We find evidence that the model undergoes a weak first order phase transition at μ=0 which becomes second order at a finite μ. Symmetry considerations suggest that the universality class of these phase transitions should be governed by a O(N)×O(2) field theory with collinear order, with N=3 at μ=0 and N=2 at μ≠0. The universality class of the second order phase transition at μ≠0 appears to be governed by the decoupled XY fixed point present in the O(2)×O(2) field theory. Finally we show that the quantum (T=0) phase transition as a function of μ is a second order mean field transition.

AB - We study thermodynamics of strongly coupled lattice QCD with two colors of massless staggered fermions as a function of the baryon chemical potential μ in 3+1 dimensions using a new cluster algorithm. We find evidence that the model undergoes a weak first order phase transition at μ=0 which becomes second order at a finite μ. Symmetry considerations suggest that the universality class of these phase transitions should be governed by a O(N)×O(2) field theory with collinear order, with N=3 at μ=0 and N=2 at μ≠0. The universality class of the second order phase transition at μ≠0 appears to be governed by the decoupled XY fixed point present in the O(2)×O(2) field theory. Finally we show that the quantum (T=0) phase transition as a function of μ is a second order mean field transition.

UR - http://www.scopus.com/inward/record.url?scp=33745785216&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33745785216&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.74.014506

DO - 10.1103/PhysRevD.74.014506

M3 - Article

AN - SCOPUS:33745785216

VL - 74

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

SN - 1550-7998

IS - 1

M1 - 014506

ER -