A Theoretical Study of Samarium Hexaboride (SmB6) as a Possible Candidate for Light Dark Matter (LDM) direct detection
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Data
2023-12-22
Autores
Loyola, Thiago Dias
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Universidade Federal do Espírito Santo
Resumo
The mystery surrounding the existence of dark matter, prompted by a substantial mismatch between theoretical predictions and experimental observations in galaxies and galaxy clusters, remains a formidable mystery awaiting resolution. A pivotal aspect of unraveling this mystery lies in its detection. It is crucial to note that this persistent enigma has led us to the formulation of different models detailing its composition and interactions with ordinary matter. In the scope of the present study, our focus centers on Light Dark Matter (LDM). Furthermore, we operate under the assumption that its interactions occur through a dark photon that is transformed into a visible photon and absorbed during the interaction process. In the subsequent discussion on the direct detection of new particles using a target, our primary objective revolves around quantifying parameters intricately linked to the interaction between the particle and the target. It is still crucial to emphasize that the nature of the target may lead us down distinct avenues within the realm of physics since molecule targets and crystal targets are analyzed by different approximations, boundary conditions, and symmetries. However, the quest for heightened interaction probability steers us inevitably into the domain of Material Science, where the size of the target becomes a pivotal determinant of success. In the context of the light-dark matter, the material selected must meet some specific criteria, including scalability, band gap, Fermi velocity, and topology, and these stand for the points that will guide us through all subsequent development up to the positive conclusion concerning the use of Samarium Hexaboride (SmB6) as a target in this detection process.
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Física da matéria condensada , Ciência dos materiais , Cristais , Redes Cistalinas , Estrutura de bandas , Teoria de bandas , Distribuição de Fermi-Dirac , Matéria escura , Matéria escura leve , Detecção direta , Detecção de partículas , Hexaboreto de Samário , SmB6