Bali, Gunnar and Bursa, Francis and Castagnini, Luca and Collins, Sara and Del Debbio, Luigi and Lucini, Biagio and Panero, Marco (2013) Mesons in large-N QCD. JOURNAL OF HIGH ENERGY PHYSICS (6): 071. ISSN 1029-8479,
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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.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | CHIRAL PERTURBATION-THEORY; LATTICE GAUGE-THEORY; MONTE-CARLO CALCULATIONS; NONPERTURBATIVE RENORMALIZATION; SYMMETRY BREAKING; PHASE-TRANSITION; HOLOGRAPHIC QCD; HADRON SPECTRUM; VECTOR-MESONS; FINITE-VOLUME; Lattice QCD; AdS-CFT Correspondence; 1/N Expansion |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Gunnar Bali |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 07 Apr 2020 13:50 |
| Last Modified: | 07 Apr 2020 13:50 |
| URI: | https://pred.uni-regensburg.de/id/eprint/16537 |
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