Scattering and bound states of a spin-1/2 neutral particle in the cosmic string spacetime

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.creatorAndrade, Fabiano M.-
Autor(es): dc.creatorFilgueiras, Cleverson-
Autor(es): dc.creatorSilva, Edilberto O.-
Data de aceite: dc.date.accessioned2026-02-09T12:09:27Z-
Data de disponibilização: dc.date.available2026-02-09T12:09:27Z-
Data de envio: dc.date.issued2018-07-13-
Data de envio: dc.date.issued2018-07-13-
Data de envio: dc.date.issued2017-
Fonte completa do material: dc.identifierhttps://repositorio.ufla.br/handle/1/29618-
Fonte completa do material: dc.identifierhttps://www.hindawi.com/journals/ahep/2017/8934691/-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1155548-
Descrição: dc.descriptionIn this paper the relativistic quantum dynamics of a spin-1/2 neutral particle with a magnetic moment 𝜇 in the cosmic string spacetime is reexamined by applying the von Neumann theory of self-adjoint extensions. Contrary to previous studies where the interaction between the spin and the line of charge is neglected, here we consider its effects. This interaction gives rise to a point interaction: ∇⋅ E = (2𝜆/𝛼)𝛿(𝑟)/𝑟. Due to the presence of the Dirac delta function, by applying an appropriated boundary condition provided by the theory of self-adjoint extensions, irregular solutions for the Hamiltonian are allowed. We address the scattering problem obtaining the phase shift, 𝑆-matrix, and the scattering amplitude. The scattering amplitude obtained shows a dependency with energy which stems from the fact that the helicity is not conserved in this system. Examining the poles of the 𝑆-matrix we obtain an expression for the bound states.The presence of bound states for this system has not been discussed before in the literature.-
Idioma: dc.languageen-
Publicador: dc.publisherHindawi-
Direitos: dc.rightsrestrictAccess-
???dc.source???: dc.sourceAdvances in High Energy Physics-
Palavras-chave: dc.subjectRelativistic quantum dynamics-
Palavras-chave: dc.subjectDirac delta function-
Palavras-chave: dc.subjectDinâmica quântica relativista-
Palavras-chave: dc.subjectFunção delta de Dirac-
Título: dc.titleScattering and bound states of a spin-1/2 neutral particle in the cosmic string spacetime-
Tipo de arquivo: dc.typeArtigo-
Aparece nas coleções:Repositório Institucional da Universidade Federal de Lavras (RIUFLA)

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