Unitarity constraints on anomalous quartic couplings

Autor(es)

Almeida, Eduardo da Silva ^[1] ; Eboli, O. J. P. ^[1] ; Gonzalez-Garcia, M. C. ^{[2, 3]}

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Fis, BR-05508090 Sao Paulo, SP - Brazil

^[2] SUNY Stony Brook, CN Yang Inst Theoret Phys, Stony Brook, NY 11794 - USA

^[3] Univ Barcelona, Dept Estruct & Constituents Mat, Inst Catalan Recerca & Estudis Avancats ICREA, 647 Diagonal, E-08028 Barcelona - Spain

• Tipo de documento: Artigo Científico
• Fonte: Physical Review D; v. 101, n. 11 JUN 26 2020.
• Citações Web of Science: 0

Resumo

We obtain the partial-wave unitarity constraints on the lowest-dimension effective operators which generate anomalous quartic gauge couplings but leave the triple gauge couplings unaffected. We consider operator expansions with linear and nonlinear realizations of the electroweak symmetry and explore the multidimensional parameter space of the coefficients of the relevant operators: 18 dimension-eight operators in the linear expansion and 5 O(p(4)) operators in the derivative expansion. We study two-to-two scattering of electroweak gauge bosons and Higgs bosons, taking into account all coupled channels and all possible heicity amplitudes for the J = 0, 1 partial waves. In general, the bounds degrade by factors of a few when several operator coefficients arc considered to be nonvanishing simultaneously. However, this requires considering constraints from both J = 0 and J =1 partial waves for some sets of operators. (AU)

• Processo FAPESP: 19/04837-9 - Fenomenologia de partículas
• Beneficiário: Gustavo Alberto Burdman
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 18/16921-1 - Busca de nova Física no large hadron collider
• Beneficiário: Eduardo da Silva Almeida
• Modalidade de apoio: Bolsas no Brasil - Doutorado