Sextic tensor model in rank 3 at next-to-leading order
We compute the four-loop beta functions of short and long-range multi-scalar models with general sextic interactions and complex fields. We then specialize the beta functions to a U(N)3 symmetry and study the renormalization group at next-to-leading order in N and small ϵ. In the short-range case, ϵ...
Gespeichert in:
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
05 October 2022
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| In: |
Journal of high energy physics
Year: 2022, Heft: 10, Pages: 1-28 |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/JHEP10(2022)037 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1007/JHEP10(2022)037
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| Verfasserangaben: | Sabine Harribey (CPHT, CNRS, École polytechnique, Institut polytechnique de Paris, Institut für Theoretische Physik, Heidelberg) |
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| 245 | 1 | 0 | |a Sextic tensor model in rank 3 at next-to-leading order |c Sabine Harribey (CPHT, CNRS, École polytechnique, Institut polytechnique de Paris, Institut für Theoretische Physik, Heidelberg) |
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| 520 | |a We compute the four-loop beta functions of short and long-range multi-scalar models with general sextic interactions and complex fields. We then specialize the beta functions to a U(N)3 symmetry and study the renormalization group at next-to-leading order in N and small ϵ. In the short-range case, ϵ is the deviation from the critical dimension while it is the deviation from the critical scaling of the free propagator in the long-range case. This allows us to find the 1/N corrections to the rank-3 sextic tensor model of [1]. In the short-range case, we still find a non-trivial real IR stable fixed point, with a diagonalizable stability matrix. All couplings, except for the so-called wheel coupling, have terms of order ϵ0 at leading and next-to-leading order, which makes this fixed point different from the other melonic fixed points found in quartic models. In the long-range case, the corrections to the fixed point are instead not perturbative in ϵ and hence unreliable; we thus find no precursor of the large-N fixed point. | ||
| 650 | 4 | |a 1/N Expansion | |
| 650 | 4 | |a Renormalization Group | |
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