Journal Club do Departamento de Física dos Materiais e Mecânica – FMT
Nesta semana o pós-graduando Bruno de Abreu Silva, do Laboratório de Estado Sólido e Baixas Temperaturas, apresentará o artigo: “Precision Measurement of the Electron’s Electric Dipole Moment Using Trapped Molecular Ions”, William B. Cairncross et al.
Dia: 24 de outubro, quarta-feira, às 12h10.
Local: Sala de Seminários José Roberto Leite Edifício Alessandro Volta (bloco C).
Abstract:
We describe the first precision measurement of the electron’s electric dipole moment (de) using trapped molecular ions, demonstrating the application of spin interrogation times over 700 ms to achieve high sensitivity and stringent rejection of systematic errors. Through electron spin resonance spectroscopy on 180Hf19Fþ in its metastable 3 Δ1 electronic state, we obtain de ¼ ð0.9 7.7stat 1.7systÞ × 10−29 e cm, resulting in an upper bound of jdej < 1.3 × 10−28 e cm (90% confidence). Our result provides independent confirmation of the current upper bound of jdej < 9.4 × 10−29 e cm [J. Baron et al., New J. Phys. 19, 073029 (2017)], and offers the potential to improve on this limit in the near future. DOI: 10.1103/PhysRevLett.119.153001 https://physics.aps.org/featured-article-pdf/10.1103/PhysRevLett.119.153001
