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Mesons in large-N QCD

Research output: Contribution to journalArticle

  • Gunnar S. Bali
  • Francis Bursa
  • Luca Castagnini
  • Sara Collins
  • Luigi Del Debbio
  • Biagio Lucini
  • Marco Panero

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Original languageEnglish
Article number71
JournalJournal of High Energy Physics
Volume2013
Issue number6
DOIs
Publication statusPublished - 18 Jun 2013

Abstract

We present the results of a systematic, first-principles study of the spectrum and decay constants of mesons for different numbers of color charges N, via lattice computations. We restrict our attention to states in the non-zero isospin sector, evaluating the masses associated with the ground-state and first excitation in the pseudoscalar, vector, scalar, and axial vector channels. Our results are based on a new set of simulations of four dimensional SU(N) Yang-Mills theories with the number of colors ranging from N=2 to N=17; the spectra and the decay constants are computed in the quenched approximation (which becomes exact in the 't Hooft limit) using Wilson fermions. After discussing the extrapolations to the chiral and large-N limits, we present a comparison of our results to some of the numerical computations and analytical predictions available in the literature - including, in particular, those from holographic computations.

    Research areas

  • hep-lat, hep-ph, hep-th

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