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We search for this effect in two years of POLARBEAR data. We do not detect a signal, and place a median 95% upper limit of 0.65∘ on the sinusoid amplitude for oscillation frequencies between 0.02days−1 and 0.45days−1, which corresponds to axion masses between 9.6×10−22eV and 2.2×10−20eV.
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https://arxiv.org/abs/2303.08410
nevertheless, here is one thing i'm fascinated about string theory an no anti-multiverse rant can ruin that!
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These extra dimensions, it suggests, are compacted so tightly together that we don’t notice them all. And each type of compactification could create a universe with different microphysics...
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https://theconversation.com/the-multiverse-our-universe-is-suspiciously-unlikely-to-exist-unless-it-is-one-of-many-200585
