• 6 Posts
  • 106 Comments
Joined 1 year ago
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Cake day: June 9th, 2023

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  • This sounds familiar.

    Nearly 30 years ago, Graydon Carter, the editor of Vanity Fair magazine, described Trump in Spy magazine as a “short-fingered vulgarian.”

    “To this day, I receive the occasional envelope from Trump. There is always a photo of him—generally a tear sheet from a magazine. On all of them he has circled his hand in gold Sharpie in a valiant effort to highlight the length of his fingers,” Carter wrote. “I almost feel sorry for the poor fellow because, to me, the fingers still look abnormally stubby.”

    source

    Is being thin skinned, petty and spiteful a requirement for MAGA conservatives?



  • There absolutely are, but I’m not super familiar with all of the consequences of majorana neutrinos. /u/drail@fedia.io might be able to provide a better answer. My background is experimental nuclear physics, so I’m familiar a lot of experiments searching for beyond the standard model physics, but less so with the theory motivation.

    One consequence of neutrinos being their own antiparticles is that it breaks lepton number conservation. This also breaks chiral symmetry, since all neutrinos are right-handed and anti-neutrinos are left-handed. This observation would also imply that neutrinos have mass - which is assumed but would be a really big deal to prove.



  • Despite space being “empty” there’s still a surprising amount of stuff streaming through it. There are protons, electrons, carbon nuclei, etc constantly slamming into the Earth’s atmosphere, producing showers of radiation. These cosmic rays are the reason so many sensitive physics experiments ( like dark matter and neutrinoless double beta decay searches) are located deep underground. The earth is a good shield against these cosmic backgrounds.

    Even if there was an “isolated” antimatter galaxy, it would get bombarded with matter in the form of cosmic rays. The annihilation photons are a really distinct signal that would be hard to miss. There are a number of gamma ray telescopes in space that map out sources of gammas, and they would have detected an antimatter galaxy if it existed.

    If the antimatter galaxies are so far away that they’re beyond the visible universe, then there’s still the big question of why there was a segregation of matter and antimatter early on.


  • You’re not alone; matter-antimatter asymmetry is one of the big open questions in physics. Most particle processes treat matter and antimatter identically, but there are a few areas where matter and antimatter have slightly different interactions. These occurrences are violations of Charge Parity symmetry aka CP Violation.

    There must have been a certain amount of CP violation during the early phases of the Big Bang to explain our matter-dominated universe. But the known amounts of CP Violation are nowhere near enough to explain the asymmetry in matter and antimatter. There are some proposed mechanisms that would violate CP symmetry in sufficient quantities, but these haven’t been experimentally observed. There are ongoing searches to detect these processes, or related processes that would be possible if these existed. Neutrinoless double beta decay searches are one example of these detection efforts.

    In summary, there’s a guaranteed Nobel Prize to whoever can answer your question.






  • I doubt Biden would use this as an excuse to drop out of the debate. His campaign thinks the debate will help him more than Trump, and they’re probably right. Outside of his diehard supporters and people keeping up with politics, most voters haven’t heard Trump speak at length since the end of his presidency. The debate is an opportunity to remind them how fucking weird he is.