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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Adding flavour to the S-matrix bootstrap

Texto completo
Cordova, Lucia [1, 2, 3, 4] ; Vieira, Pedro [1, 5]
Número total de Autores: 2
Afiliação do(s) autor(es):
[1] Perimeter Inst Theoret Phys, Waterloo, ON N2L 2Y5 - Canada
[2] Univ Waterloo, Dept Phys & Astron, Waterloo, ON N2L 3G1 - Canada
[3] Univ Waterloo, Guelph Waterloo Phys Inst, Waterloo, ON N2L 3G1 - Canada
[4] CEA Saclay, Inst Phys Theor, F-91191 Gif Sur Yvette - France
[5] Univ Estadual Paulista, ICTP South Amer Inst Fundamental Res, Inst Fis Teor, BR-01140070 Sao Paulo - Brazil
Número total de Afiliações: 5
Tipo de documento: Artigo Científico
Fonte: Journal of High Energy Physics; n. 12 DEC 11 2018.
Citações Web of Science: 1

We explore the S-matrices of gapped, unitary, Lorentz invariant quantum field theories with a global O(N) symmetry in 1+1 dimensions. We extremize various cubic and quartic couplings in the two-to-two scattering amplitudes of vector particles. Saturating these bounds, we encounter known integrable models with O(N) symmetry such as the O(N) Gross-Neveu and non-linear sigma models and the scattering of kinks in the sine-Gordon model. We also considered more general mass spectra for which we move away from the integrable realm. In this regime we find (numerically, through a large N analysis and sometimes even analytically) that the S-matrices saturating the various coupling bounds have an extremely rich structure exhibiting infinite resonances and virtual states in the various kinematical sheets. They are rather exotic in that they admit no particle production yet they do not obey Yang-Baxter equations. We discuss their physical (ir)relevance and speculate, based on some preliminary numerics, that they might be close to more realistic theories with particle production. (AU)

Processo FAPESP: 16/01343-7 - ICTP Instituto Sul-Americano para Física Fundamental: um centro regional para física teórica
Beneficiário:Nathan Jacob Berkovits
Linha de fomento: Auxílio à Pesquisa - Temático