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Science

Something Weird Just Happened That We Can't Really Explain With Existing Physics (popularmechanics.com) 41

"Why did this particle mysteriously disintegrate?" asks Popular Mechanics. Slashdot reader aeropage shared their report: Scientists have proposed a new kind of subatomic particle to explain another particle's mysterious disintegration. The kaon, a special case of meson particle, is made of one quark and one antiquark. All are part of the overall family called hadrons. When kaon particles decay, a very rare few undergo a change that has baffled scientists. Can it be explained by existing physics at all...?

If this kaon decay (de-kaon?) is validated, it represents something new in physics. The style of decay could indicate a new kind of particle altogether, or a new physical force at work to make the novel decay... Kaons have several known common ways of decaying, but the one in this paper is so rare that scientists weren't sure it existed before now. Their model predicted they'd see less than a quarter of one instance of this decay in their sample -- not four, which is a veritable fortune by comparison. What does it mean to see so many more instances?

"If confirmed, this requires physics beyond the standard model to enhance the signal."

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Something Weird Just Happened That We Can't Really Explain With Existing Physics

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  • by Anonymous Coward
    maybe it was never there at all...
    • I agree. Maybe a false way of detecting..or was it there because they was measuring it? Like light can be a particle and a wave. We barely understand how physics works....
      • by ShanghaiBill ( 739463 ) on Sunday March 08, 2020 @02:43PM (#59808880)

        So far this phenomenon has been observed by ONE laboratory. So until it is replicated elsewhere, experimental error is the most plausible explanation.

    • So ... this is the god particle, then?

      • by gtall ( 79522 )

        Lucifer Particle, it's constantly lying about its existence, a bit like a UFO.

  • Oh Crap (Score:2, Offtopic)

    by SuperKendall ( 25149 )

    Their model predicted they'd see less than a quarter of one instance of this decay in their sample -- not four, which is a veritable fortune by comparison. What does it mean to see so many more instances?

    Damn, the Coronavirus has mutated to the subatomic realm now, and can infect Kaons!

  • by Roger W Moore ( 538166 ) on Sunday March 08, 2020 @02:14PM (#59808814) Journal
    A far more likely explanation for this result is an unaccounted background or other experimental effect. The experiment the article refers to is hunting for K0-->pi0 nu nubar. This is an insanely hard decay to observe because the two neutrinos do not interact with your detector and the pi0 decays immediately to two photons leaving you with a neutral particle in and two neutral particles out. This means you miss half the decay products and have no particle tracks for the rest which are an exceptionally good tool for reducing backgrounds. Since the chance of a kaon decaying this way is astonishingly tiny (around one in a billion) this means there are a billion times more kaon decays any one of which could "fake" this type of decay (e.g. K0-->pi0pi0 where you lose the photons from one of the pions).

    The very similar decay, K+-->pi+ nu nubar has been (barely) observed (IIRC three experiments have under 10 events between them!) and so far is consistent with the Standard Model (within large uncertanties) so if this result is correct then the new physics would have to only affect this decay and not the other which would be unusual since all you are doing is swapping a d-quark for a u-quark.

    So, while it is certainly possible that there is something new here at this stage the far more likely scenario is that this is an experimental effect. The decay is ridiculously hard to observe and, even though the KOTO experiment has done an exceptional job getting this result out (I was at a KAON conference back in the mid-1990's when a theorist generated laughter for casually suggested we should go after this decay experimentally - it's that hard!) they will need to do a lot more to convince people that there is something real here.
    • I agree. If I had to bet on experimental error or physics beyond the standard model, I would bet on experimental error. I am always glad to hear about more potential opportunities to look behind the veil, but I won't hold my breath.
    • by Compuser ( 14899 )

      I do not do particle physics so I am curious. I looked at the paper (just plots since there were only two and they seemed pretty clear but the wording is largely imparseable to me) and it seemed as though 99.9 confidence region was intersecting the SM region. Am I right to conclude that their results are nowhere near six sigma?

    • by goombah99 ( 560566 ) on Sunday March 08, 2020 @04:03PM (#59809016)

      THe matrix doesn't try to eliminate all errors, every now and then it kills off a program and restarts it. All it's orphaned assets without valid pointers that escaped normal garbage collection get deleted when the process ends. All valid particle pointers get re-created. And the simulation can continue. As long as one does this before the excess mass builds up too much the humans can't notice it, except for a few Hippies and Micro dosing tech-bros. But no one believes what they say anyhow.

    • Here's a random theory.. what if said molecules were simply the end product of a reaction from their other half tied in from quantum entanglement where said molecules on the other end were simply destroy/changed?

      Without more sources for testing it's just a theory to consider.
  • I've got nothing against Popular Mechanics, but - isn't subatomic physics a bit far afield for them? Do they run recipe and makeup columns as well?

    • by Sique ( 173459 ) on Sunday March 08, 2020 @02:40PM (#59808870) Homepage
      In this case, it's Popular Quantum Mechanics.
    • I've got nothing against Popular Mechanics, but - isn't subatomic physics a bit far afield for them?

      Popular Mechanics has quite a few general science articles. Topics like particle physics have been covered before.

      Do they run recipe and makeup columns as well?

      There are plenty of other periodicals covering those topics. But sciencey stuff is an underserved market.

    • I've got nothing against Popular Mechanics, but - isn't subatomic physics a bit far afield for them? Do they run recipe and makeup columns as well?

      It's the "Something something - Scientists are STUNNED!" concept.

      That way, the public can always chuckle and say "Oh those silly scientists are always stunned", the anti science people can feel vindicated, and the conspiracists can clain their conspiracy du jour

      Meanwhile, all the scientists are saying "Cool!" and running to their computers or chalkboards.

      • I'm patiently awaiting a disintegration ray to be designed around this.
        • I'm patiently awaiting a disintegration ray to be designed around this.

          At that point, we'd be truly able to stun those silly scientists.

  • Is this a probability thing? Where they are only expecting to see it 1/4 of the time? Otherwise, this does not make sense. Either you see something or you do not see something. How do you see 1/4 of something?

    • Is this a probability thing? Where they are only expecting to see it 1/4 of the time? Otherwise, this does not make sense. Either you see something or you do not see something. How do you see 1/4 of something?

      I think it means they observed 4 events, but in the time they observed they should have had a probability of 25% of seeing only one.

      No single family has 2.3 kids, but the average number of kids per family over a population is not likely to be an integer.

    • by gtall ( 79522 )

      Haven't been exposed to modern experimental physics then? The physical world is complicated, setting up an experiment to observe something at the quantum level won't ever come back with Ya or Nah. Rather, you only get to observe a frequency of an event happening against (1) the of background quantum weirdness and (2) the limits of the theory upon which you are basing your experiment. Quantum mechanics isn't a qualitative theory in the sense that it explains anything, rather it is a quantitative theory which

  • ...see sig.

  • ...gives me an enormous hadron!

    Though I'm uncertain where it's been, or how long it'll last.

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