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      The order of the quantum chromodynamics transition predicted by the standard model of particle physics

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          Abstract

          We determine the nature of the QCD transition using lattice calculations for physical quark masses. Susceptibilities are extrapolated to vanishing lattice spacing for three physical volumes, the smallest and largest of which differ by a factor of five. This ensures that a true transition should result in a dramatic increase of the susceptibilities.No such behaviour is observed: our finite-size scaling analysis shows that the finite-temperature QCD transition in the hot early Universe was not a real phase transition, but an analytic crossover (involving a rapid change, as opposed to a jump, as the temperature varied). As such, it will be difficult to find experimental evidence of this transition from astronomical observations.

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          Most cited references 20

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          Ultraviolet Behavior of Non-Abelian Gauge Theories

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            Reliable Perturbative Results for Strong Interactions?

             H. Politzer (1973)
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              Cosmic separation of phases

               Edward Witten (1984)
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                Author and article information

                Journal
                10 November 2006
                hep-lat/0611014 10.1038/nature05120
                Custom metadata
                Nature 443:675-678,2006
                7 pages, 4 figures
                hep-lat

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