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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Unitarity constraints on anomalous quartic couplings

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Almeida, Eduardo da Silva [1] ; Eboli, O. J. P. [1] ; Gonzalez-Garcia, M. C. [2, 3]
Total Authors: 3
[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
Total Affiliations: 3
Document type: Journal article
Source: Physical Review D; v. 101, n. 11 JUN 26 2020.
Web of Science Citations: 0

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)

FAPESP's process: 19/04837-9 - Particle Physics Phenomenology
Grantee:Oscar José Pinto Eboli
Support type: Research Projects - Thematic Grants
FAPESP's process: 18/16921-1 - Seach for new Physics on large hadron collider
Grantee:Eduardo da Silva Almeida
Support type: Scholarships in Brazil - Doctorate