Classifying three-character RCFTs with Wronskian Index equalling 0 or 2

Das, Arpit; Gowdigere, Chethan N.; Santara, Jagannath

Abstract

In the modular linear differential equation (MLDE) approach to classifying rational conformal field theories (RCFTs) both the MLDE and the RCFT are identified by a pair of non-negative integers [n,l]. n is the number of characters of the RCFT as well as the order of the MLDE that the characters solve and l, the Wronskian index, is associated to the structure of the zeroes of the Wronskian of the characters. In this paper, we study [3,0] and [3,2] MLDEs in order to classify the corresponding CFTs. We reduce the problem to a “finite” problem: to classify CFTs with central charge 0 < c ≤ 96, we need to perform 6, 720 computations for the former and 20, 160 for the latter. Each computation involves (i) first finding a simultaneous solution to a pair of Diophantine equations and (ii) computing Fourier coefficients to a high order and checking for positivity. In the [3,0] case, for 0 < c ≤ 96, we obtain many character-like solutions: two infinite classes and a discrete set of 303. After accounting for various categories of known solutions, including Virasoro minimal models, WZW CFTs, Franc-Mason vertex operator algebras and Gaberdiel-Hampapura-Mukhi novel coset CFTs, we seem to have seven hitherto unknown character-like solutions which could potentially give new CFTs. We also classify [3,2] CFTs for 0 < c ≤ 96: each CFT in this case is obtained by adjoining a constant character to a [2,0] CFT, whose classification was achieved by Mathur-Mukhi-Sen three decades ago.

Citation

Das, A., Gowdigere, C. N., & Santara, J. (2021). Classifying three-character RCFTs with Wronskian Index equalling 0 or 2. Journal of High Energy Physics, 2021, Article 195. https://doi.org/10.1007/jhep11%282021%29195

• Journal Article Type: Article
• Acceptance Date: Nov 4, 2021
• Online Publication Date: Nov 25, 2021
• Publication Date: 2021
• Deposit Date: Sep 14, 2021
• Publicly Available Date: Jan 25, 2022
• Journal: Journal of High Energy Physics
• Print ISSN: 1126-6708
• Electronic ISSN: 1029-8479
• Publisher: Scuola Internazionale Superiore di Studi Avanzati (SISSA)
• Peer Reviewed: Peer Reviewed
• Volume: 2021
• Article Number: 195
• DOI: https://doi.org/10.1007/jhep11%282021%29195
• Public URL: https://durham-repository.worktribe.com/output/1240629
• Related Public URLs: https://arxiv.org/abs/2108.01060