Conformal invariance and degrees of freedom in the QCD string

Keith R. Dienes, Jean René Cudell

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


We demonstrate that the Hagedorn-type growth of the number of observed meson states can be used to constrain the degrees of freedom of the underlying effective QCD string. We find that the temperature relevant for such string theories is not given by the usual Hagedorn value TH160 MeV, but is considerably higher. This resolves an apparent conflict with the results from a static quark-potential analysis, and suggests that conformal invariance and modular invariance are indeed reflected in the hadronic spectrum. We also find that the D=2 scalar string is in excellent agreement with data.

Original languageEnglish (US)
Pages (from-to)187-190
Number of pages4
JournalPhysical review letters
Issue number2
StatePublished - 1994

ASJC Scopus subject areas

  • General Physics and Astronomy


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