New Portal to Unveil the Dark Sector of the Universe

[SolarpunkFan]

IBS scientists theorize a new portal to peek into the dark world

Once upon a time, the Universe was just a hot soup of particles. In those days, together with visible particles, other particles to us hidden or dark might have formed. Billions of years later scientists catalogued 17 types of visible particles, with the most recent one being the Higgs boson, creating the 'Standard Model'. However, they are still struggling to detect the hidden particles, the ones that constitute the dark sector of the Universe.

Scientists at the Center for Theoretical Physics of the Universe, within the Institute for Basic Science (IBS) have proposed a hypothetical portal that connects two possible dark sector particles; their research could open a new perspective into the murky understanding of the dark sector. Published in Physical Review Letters, this study has implications in cosmology and astroparticle physics.

Physicists have plenty of ideas about what these dark sector particles might look like. One candidate is the axion, which is a very light particle that can solve some theoretical problems of the Standard Model. Another candidate is the dark photon: A very light particle which shares some properties with one of the particles of the Standard Model, that is the photon, the constituent of visible light. However, while photons couple to the electromagnetic charge, dark photons couple to the so-called dark charge, that might be carried by other dark sector particles.

Physicists believe that the dark sector communicates with the Standard Model, via portals. For example, a vector portal would allow the mixing between photons and dark photons. And, an axion portal connects axions and photons. There are only several possible portals physicists have identified, and each portal is a major tool in theoretical and experimental studies in searching for dark sector particles. A team of IBS scientists, hypothesized the existence of a new portal they named the "dark axion portal" that connects dark photons and axions.

The central idea of the dark axion portal is based on the observation that new heavy quarks may also have a dark charge that couples to the dark photon. Through the heavy quarks, axion, photon, and dark photon can interact with each other.

IBS scientists imagine that the dark axion portal could bring ideas for new experiments. So far, the axion search has been performed using only the axion portal, which connects the axion to a pair of photons (axion—photon—photon coupling). Similarly, the dark photon search has been performed using a different portal, namely a vector portal, which allows a small mixing between the dark photon and photon. The dark axion portal could link the two: "The dark axion portal suggests the first meaningful connection between the two physics, which have been studied separately: It connects the dots. This will allow reinterpretation of the previous data, and potentially make a breakthrough in the axion and dark photon searches," explains LEE Hye-Sung, corresponding author of the paper.

[FireNexus]

I don't understand physics enough to say for sure, but this sounds like treknobabble level bullshit.

[jwl]

I don't understand physics enough to say for sure, but this sounds like treknobabble level bullshit.

It doesn't sound terribly dodgy to me, even if the way it is phrased is rather non-standard. It hardly sounds revolutionary though. All it is saying is that two different hypothetical particles might interact with each other and this interaction might change how you might observe them. Theorists are coming up with ideas like this all the time, come back when they actually discover the axion or rule it out completely.

[SpottedKitty]

It doesn't sound terribly dodgy to me, even if the way it is phrased is rather non-standard.

Sounds a bit off-kilter to me as well. Translation weirdness, maybe? The .kr domain seems to be South Korea; maybe the article was written or translated by someone who knows English but not particle physics?