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Mesons in large-N QCD

Gunnar Bali, Francis Bursa, Luca Castagnini, Sara Collins, Luigi Debbio, Biagio Lucini Orcid Logo, Marco Panero

Journal of High Energy Physics, Volume: 2013, Issue: 6

Swansea University Author: Biagio Lucini Orcid Logo

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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...

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Published in: Journal of High Energy Physics
ISSN: 1029-8479
Published: 2013
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URI: https://cronfa.swan.ac.uk/Record/cronfa15285
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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.
Keywords: Lattice QCD, AdS-CFT Correspondence, 1/N Expansion
College: Faculty of Science and Engineering
Issue: 6