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star apple
If there were dark photons in the dark matter sector.. should it be described by gauge symmetry.. in other words.. should the dark photons be gauge bosons? or nongauge bosons just like the higgs?
star apple said:dark photons
Light that is not light? A particle that should be called a "darkon"?PeterDonis said:What are "dark photons"?
PeterDonis said:What are "dark photons"? Do you have a reference?
star apple said:https://home.cern/about/updates/2016/11/na64-hunts-mysterious-dark-photon
star apple said:should it be described by gauge symmetry
PeterDonis said:As is typical, this article does not link to any actual papers. I find some papers by Googling "dark photon site:arxiv.org", but the general impression from a quick skim of these is that this is a highly speculative model (or class of models--there seem to be a number of hypothetical proposals) which will not be easy to test.
It looks like the hypotheses that go by the name "dark photon" are called that by analogy with electromagnetism: they basically propose a new U(1) gauge boson that mediates an interaction between some type of dark matter (the models for that appear to vary) and ordinary matter. On a quick skim I don't see any hypotheses that don't involve that gauge symmetry. (Such a model is easy to construct, which is probably why theorists trying to find dark matter are trying these kinds of models first.)
star apple said:I think dark photon doesn't mediate the interaction between some type of dark matter and ordinary matter.
star apple said:please share paper where it is not based on gauge symmetry
star apple said:I hate the idea of dark galaxy and dark planet and dark people. So please show any updated paper that refute them.
Even if introduced as a gauge group that only couples to the dark sector, models including a dark ##U(1)## generally lead to very weak interactions with Standard Model matter via mixing of the dark photon with the photon. This also leads to concepts such as millicharged dark matter.star apple said:I think dark photon doesn't mediate the interaction between some type of dark matter and ordinary matter. Dark photons seem to a term reserved only for interaction between dark matter themselves..
This is the https://na64.web.cern.ch/content/publications of the NA64 collaboration. Essentially they are trying to shine light through a wall, which would be partially possible if the photon mixed with a dark photon.PeterDonis said:As is typical, this article does not link to any actual papers. I find some papers by Googling "dark photon site:arxiv.org", but the general impression from a quick skim of these is that this is a highly speculative model (or class of models--there seem to be a number of hypothetical proposals) which will not be easy to test.
Nobody has proposed that this would be the case even in a dark sector with both dark photons and dark atoms. Dark matter must still behave very differently from ordinary matter. In particular, you are completely ignoring this passage:star apple said:I hate the idea of dark galaxy and dark planet and dark people.
star apple said:"A cautionary note: the dark
matter galaxy would not include dark stars or large planets, because
these would have been observed through their gravitational-
lensing effects on ordinary matter."
Dark photons are theoretical particles that are thought to be the mediator of interactions in the dark matter sector. They play a crucial role in understanding the behavior and properties of dark matter, which makes up about 85% of the total matter in the universe.
Gauge symmetry is a fundamental principle in physics that relates to the invariance of physical laws under certain transformations. Dark photons are associated with a new gauge symmetry that is believed to exist in the dark matter sector, which helps explain the behavior of dark matter particles.
The gauge symmetry of dark photons is different from that of ordinary photons because they are thought to be associated with a new gauge group that is specific to the dark matter sector. This new gauge symmetry allows for interactions between dark matter particles that cannot be explained by the standard model of particle physics.
Currently, there is no direct evidence for the existence of dark photons, so they cannot be directly detected. However, scientists are actively searching for indirect evidence of their existence through experiments such as the Large Hadron Collider and through the study of astrophysical phenomena.
Studying dark photons and their associated gauge symmetry can provide valuable insights into the nature of dark matter and its role in the evolution of the universe. It can also help expand our understanding of fundamental physics and potentially lead to new discoveries and advancements in our understanding of the universe.