10–14 Nov 2025
Kavli IPMU
Asia/Tokyo timezone

Toward remote sensing of backward reflection from stimulated axion decay

11 Nov 2025, 14:00
20m
Seminar room B (Kavli IPMU)

Seminar room B

Kavli IPMU

Ground floor of Kavli IPMU, next to the Lecture Hall

Speaker

Kensuke Homma

Description

We propose a method for remotely detecting backward reflection via induced decay of cold dark matter such as axion in the background of a propagating coherent photon field. This method can be particularly useful for probing concentrated dark matter streams by Earth’s gravitational lensing effect. Formulae for the stimulated reflection process and the expected sensitivities in local and remote experimental approaches are provided for testing eV scale axion models using broad band lasers. The generic axion-photon coupling is expected to be explorable up to O(10^-11 ) GeV and O(10^-22 ) GeV for the idealized local and remote setups, respectively [1]. We report on the recent developments toward the pilot search.

[1] K. Homma, JHEP 09 (2024) 034 • e-Print: 2312.02005 [hep-ph]"

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