5–7 Mar 2025 Conference
Nagoya University
Asia/Tokyo timezone

Millicharged dark matter detection with Mach-Zehnder interferometer

5 Mar 2025, 18:15
1h 45m
Sakata and Hirata Hall (Nagoya University)

Sakata and Hirata Hall

Nagoya University

Science South bulding, Furo-cho, Chikusa, Nagoya, Aichi, 464-8602, Japan

Speaker

Chrisna Setyo Nugroho (National Taiwan Normal University)

Description

If the dark sector exists and communicates with Standard Model through the U (1) mixing, it is possible that electromagnetism would have influence on matter fields in dark sector, so-called millicharge particles (mCPs). Furthermore, the highest mCPs could be dark matter particles. Recently it has been shown that the mCPs would be slowed down and captured by the earth. As a result, the number density of accumulated mCPs underground is enhanced by several orders of magnitude as compared to that of dark matter in our solar system. In this study, we propose to use the Mach-Zehnder (MZ) laser interferometer to detect earth bound mCPs through the detection of phase shifts of photons. We show that, for mass of mCPs lager than 1 GeV, the sensitivity of probing the mixing parameter ? could reach as low as 10^{−11} if number density is larger than 1 cm^{−3}.

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