Axion dark matter detection by laser spectroscopy of ultracold molecular oxygen: a proposal

Year: 2015

Authors: Santamaria L., Braggio C., Carugno G., Di Sarno V., Maddaloni P., Ruoso G.

Autors Affiliation: Ist Nazl Ottica, CNR INO, I-80078 Pozzuoli, Italy; Univ Padua, Dipartimento Fis G Galilei, I-35131 Padua, Italy; Ist Nazl Fis Nucl, I-50019 Sesto Fiorentino, Italy; Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy.

Abstract: Generalizing Sikivie’s approach (Sikivie 2014 Phys. Rev. Lett.113 201301), according to which dark matter axions may induce transitions between Zeeman states in an atomic system, an experiment based on a molecular gas is proposed for a search in the axion mass range between 1.4 and 1.9 meV. In particular, a 16O2 sample is brought to the temperature of 280m Kvia buffer-gas cooling and then subjected to an external magnetic field; axion-driven transitions are eventually detected by resonanceenhanced multi-photon ionization spectroscopy.

Journal/Review: NEW JOURNAL OF PHYSICS

Volume: 17      Pages from: 113025-1  to: 113025-7

KeyWords: Galaxies; Ionization of gases; Laser spectroscopy; Photoionization; Atomic system; Buffer gas cooling; Dark matter; Dark matter detection; External magnetic field; Molecular gas; Multiphoton ionization; Resonance enhanced; Molecular oxygen
DOI: 10.1088/1367-2630/17/11/113025

Citations: 23
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