The spin-one Duffin-Kemmer-Petiau equation revisited
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The Duffin-Kemmer-Petiau equation is investigated for spin one bosons with the so-called natural (normal) and unnatural (abnormal) parity states for non-minimal vector interactions. To illustrate the current state of knowledge about the equation, a thorough but concise discussion is made on what can be achieved analytically within this framework for well-known phenomenological interactions, including Coulomb, soft-core, Cornell, Kratzer, and exponential type interactions. In the non-exponential cases, the equation, depending on the chosen interaction, is studied in relation to the confluent, doubly-confluent, and biconfluent Heun functions. Furthermore, to show the need for careful treatment of various parity states, a Kratzer-type potential, such as a generalized Coulomb interaction, is discussed in depth using the Lie algebraic approach, showing the need for careful analysis of abnormal parity states in a fairly explicit way. The energies obtained are discussed using some figures to explicitly show the different regimes, as well as the absence of the Klein paradox. Finally, some directions for future work that would undoubtedly need to be explored in this field are discussed.
Como referenciar
BADARAN, M.; NIETO, L.M.; OLIVEIRA, L.P. de; ZARRINKAMAR, S. The spin-one Duffin-Kemmer-Petiau equation revisited: analytical study of its structure and a careful choice of interaction. Physica Scripta, v. 100, n. 7, p. 1-10, 2025. DOI: 10.1088/1402-4896/ade2a2. Disponível em: https://repositorio.ipen.br/handle/123456789/49434. Acesso em: 20 Mar 2026.
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