# The physics of eight flavours

@article{Deuzeman2008ThePO, title={The physics of eight flavours}, author={Albert Deuzeman and Maria Paola Lombardo and Elisabetta Pallante}, journal={Physics Letters B}, year={2008}, volume={670}, pages={41-48} }

Abstract We study Quantum Chromodynamics with eight flavours by use of lattice simulations and present evidence that the theory still breaks chiral symmetry in the zero temperature, continuum limit. This confirms that the lower end of the conformal window of QCD lies above N f = 8 .

#### 84 Citations

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#### References

SHOWING 1-10 OF 93 REFERENCES

Lattice study of the conformal window in QCD-like theories.

- Physics, Medicine
- Physical review letters
- 2008

The extent of the conformal window for an SU(3) gauge theory with N{f} Dirac fermions in the fundamental representation is studied to present lattice evidence that the infrared behavior is governed by a fixed point. Expand

Scales of chiral symmetry breaking in quantum chromodynamics

- Physics
- 1982

Computer simulations indicate that the range of the force responsible for chiral symmetry breaking in quantum chromodynamics is relatively short, independent of confinement, and depends strongly on… Expand

The chiral critical point in 3-flavour QCD

- Physics
- 2001

Abstract We determine the second order endpoint of the line of first order phase transitions, which occur in the light quark mass regime of 3-flavour QCD at finite temperature, and analyze universal… Expand

Simulations of gauge theories with many fermions using the pseudo-fermion method

- Physics
- 1986

SU(3) gauge theory with 4 and 8 light, dynamical flavours is simulated on an 83 × 4 lattice using the staggered fermions and the pseudo-fermion method. A comparison of the results with those obtained… Expand

Lattice QCD with many flavours

- Physics
- 1997

Abstract We discuss the confining and chiral-symmetry breaking properties of QCD with a large number of flavors N f . In a Monte Carlo simulation of QCD with N f = 16 staggered fermions, we find… Expand

QCD with large number of quarks: effects of the instanton - anti-instanton pairs

- Physics
- 1998

Abstract We calculate the contribution of instanton – anti-instanton ( I I ) pairs to the vacuum energy of QCD-like theories with N f light fermions, using the saddle point method. A qualitative… Expand

On-shell improved lattice gauge theories

- Physics
- 1985

By means of a spectrum conserving transformation, we show that one of the 3 coefficients in Symanzik's improved action can be chosen freely, if only spectral quantities (masses of stable particles,… Expand

Computation of the action for on-shell improved lattice gauge theories at weak coupling

- Physics
- 1985

Abstract The coefficient in Symanzik's improved lattice action for (pure) SU(2) and SU(3) gauge theories are determined to one-loop order by requiring the absence of leading scaling violations in a… Expand

On the phase structure of vector-like gauge theories with massless fermions

- Physics
- 1982

Abstract We present a systematic expansion for studying an infrared-stable fixed point of gauge theories with massless fermions. These results are combined with information from strong coupling and… Expand

Remarks on the Chiral Phase Transition in Chromodynamics

- Physics
- 1984

The phase transition restoring chiral symmetry at finite temperatures is considered in a linear $\ensuremath{\sigma}$ model. For three or more massless flavors, the perturbative… Expand