Hadron Mass Spectrum from Lattice QCD
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Publisher:American Physical Society
Citation:Abhijit Majumder and Berndt Müller, "Hadron Mass Spectrum from Lattice QCD," Physical Review Letters 105, no. 25 (2010), doi:10.1103/PhysRevLett.105.252002
Finite temperature lattice simulations of quantum chromodynamics (QCD) are sensitive to the hadronic mass spectrum for temperatures below the “critical” temperature T_c≈160 MeV. We show that a recent precision determination of the QCD trace anomaly shows evidence for the existence of a large number of hadron states beyond those known from experiment. The lattice results are well represented by an exponentially growing mass spectrum up to a temperature T=155 MeV. Using simple parametrizations of the hadron mass spectrum we show how one may estimate the total spectral weight in these yet undermined states.