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;thespectraandthedecayconstantsarecomputedinthequenchedapproximation (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.
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Bali, G., Bursa, F., Castagnini, L. et al. Mesons in large-N QCD. J. High Energ. Phys. 2013, 71 (2013). https://doi.org/10.1007/JHEP06(2013)071
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DOI: https://doi.org/10.1007/JHEP06(2013)071