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posted by janrinok on Friday February 16 2018, @08:39PM   Printer-friendly
from the catchy-name dept.

Dark matter, neutrinos and tachyons in the same abstract? Oh yes:

According to conventional wisdom the 5-hour early Mont Blanc burst probably was not associated with SN 1987A, but if it was genuine, some exotic physics explanation had to be responsible. Here we consider one truly exotic explanation, namely faster-than-light neutrinos having sourcemν2=−0.38keV2. It is shown that the Mont Blanc burst is consistent with the distinctive signature of that explanation i.e., an 8 MeV antineutrino line from SN 1987A. It is further shown that a model of core collapse supernovae involving dark matter particles of mass 8 MeV would in fact yield an 8 MeV antineutrino line

Journal paper: https://www.sciencedirect.com/science/article/pii/S0927650517303341
arxiv: https://arxiv.org/abs/1701.00488v8


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  • (Score: 0) by Anonymous Coward on Friday February 16 2018, @08:49PM

    by Anonymous Coward on Friday February 16 2018, @08:49PM (#639032)

    Generate me some tachyons via the replicator and put them into my flying car's fuel-tank so I can drive to the EM-ship space-port to visit Risa.

  • (Score: 4, Funny) by Apparition on Friday February 16 2018, @09:12PM (4 children)

    by Apparition (6835) on Friday February 16 2018, @09:12PM (#639039) Journal

    I thought that Dark Matter was canceled?

    • (Score: 2) by cmdrklarg on Friday February 16 2018, @10:09PM (3 children)

      by cmdrklarg (5048) Subscriber Badge on Friday February 16 2018, @10:09PM (#639073)

      It was? Damn, I liked that show.

      --
      The world is full of kings and queens who blind your eyes and steal your dreams.
      • (Score: -1, Spam) by Anonymous Coward on Friday February 16 2018, @10:10PM (1 child)

        by Anonymous Coward on Friday February 16 2018, @10:10PM (#639076)

        Slewp, ahhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh!

        Wow! Your snap is drippin' with spit, almost as if someone mercilessly slewped from the bottom of your snappycrack to the top! It... had to be a slewpy existenceness, or otherwise known as "One Who Slewps"! Such a thing!

        Who could have done such a thing!? Wait... whoever did this left a cryptic puzzle behind. It's likely that solving it will enable you to find out the identity of this mysterious slewper. I couldn't solve it no matter what I tried, but perhaps you can. Here it is: "It's me."

      • (Score: 2) by Apparition on Saturday February 17 2018, @03:42AM

        by Apparition (6835) on Saturday February 17 2018, @03:42AM (#639191) Journal

        Yep. [wordpress.com] Canceled with a cliffhanger ending even.

  • (Score: 1) by nitehawk214 on Friday February 16 2018, @09:26PM (3 children)

    by nitehawk214 (1304) on Friday February 16 2018, @09:26PM (#639047)

    Formatting errors in summary.

    --
    "Don't you ever miss the days when you used to be nostalgic?" -Loiosh
    • (Score: 3, Insightful) by bob_super on Friday February 16 2018, @09:40PM (1 child)

      by bob_super (1357) on Friday February 16 2018, @09:40PM (#639058)

      Formatting error is only half of the problem with TFS.
      I'm trying to figure out if putting so little context legally counts as RTFA clickbait...

      • (Score: -1, Spam) by Anonymous Coward on Friday February 16 2018, @10:43PM

        by Anonymous Coward on Friday February 16 2018, @10:43PM (#639088)

        Your rectal womb belongs to me now, you little sow! Ahhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh!

    • (Score: 2) by janrinok on Saturday February 17 2018, @07:43PM

      by janrinok (52) Subscriber Badge on Saturday February 17 2018, @07:43PM (#639428) Journal
      Thanks, fixed now. Not sure how that crept in there...
  • (Score: 0) by Anonymous Coward on Friday February 16 2018, @09:29PM

    by Anonymous Coward on Friday February 16 2018, @09:29PM (#639052)

    Oh shit I'm feeling it - Tachyon
    Hell yeah, fuck yeah, I feel like killing it - Tachyon
    Alright that’s tight, what it's like to experience - Tachyon

  • (Score: 1, Insightful) by Anonymous Coward on Friday February 16 2018, @09:34PM (3 children)

    by Anonymous Coward on Friday February 16 2018, @09:34PM (#639056)

    awesome as that is
    and decided it had to be dark matter.

    i'm glad these are not the people that write the code i depend on.

    • (Score: 0) by Anonymous Coward on Saturday February 17 2018, @06:13AM (2 children)

      by Anonymous Coward on Saturday February 17 2018, @06:13AM (#639242)

      it's worse than that.
      there's an unexplained event.
      they picked out an unrelated event, so that the math would fit, and said "if the unexplained event is related to this other event, then it's tachyons!".

      it's just like that thing where you take the length of the pyramid in inches and divide it by the Earths' diameter in kilometers and then you get Jesus's head circumference in a little known measurement unit.
      the technical term (careful, sciency word follows) is numerology.

      off-topic: sometimes i calm down and think exotic matter physicists are physicists too. then I run into stuff like this.

      • (Score: 0) by Anonymous Coward on Saturday February 17 2018, @02:45PM (1 child)

        by Anonymous Coward on Saturday February 17 2018, @02:45PM (#639340)

        what i find strange is that it is possible for a sailing ship to sail faster then the wind ... albeit not in the direction the wind is blowing.
        now i don't know how this is relevant to teh tachyon discussion; them being like a poop in a flaming brown paper bag at your physicists front door and all.

        but anyways, maybe the "sailing-ship-goes-faster-then-the-wind-is-blowing" analogy might be a useful one since using a car analogy, one might be
        hard pressed to explain tachyons?

        anyways, we better come up with a good analogy to explain tachyons, since else this post totally made me right it ...

        • (Score: 0) by Anonymous Coward on Sunday February 18 2018, @10:58AM

          by Anonymous Coward on Sunday February 18 2018, @10:58AM (#639668)

          we don't have to explain something that doesn't exist.
          ok, so you can write down some equations that give you particles moving faster than light.
          that's meaningless until they make an experiment where their theory is confirmed.
          as far as objective reality is concerned, there is no experimental measurement that requires tachyons in order to be explained.

  • (Score: 2, Insightful) by The Mighty Buzzard on Friday February 16 2018, @11:02PM (2 children)

    by The Mighty Buzzard (18) Subscriber Badge <themightybuzzard@proton.me> on Friday February 16 2018, @11:02PM (#639097) Homepage Journal

    Last I heard it was supposed to be physically impossible to detect tachyons. Did this change?

    --
    My rights don't end where your fear begins.
    • (Score: 2) by HiThere on Saturday February 17 2018, @01:35AM

      by HiThere (866) Subscriber Badge on Saturday February 17 2018, @01:35AM (#639155) Journal

      I thought tachyons were supposed to be dead simple to detect, if they interacted with normal matter at all, because each time they hit something they ended up going faster so they would leave a blazing trail of virtual particles turned real all along the length of their traverse. Of course, it would be difficult to decide that they were tachyons, because it would look like they were moving the opposite to the direction they were headed (unless it was essentially perpendicular to the line of observation).

      OTOH, perhaps tachyons only interact with dark matter. That might be difficult to observe.

      --
      Javascript is what you use to allow unknown third parties to run software you have no idea about on your computer.
    • (Score: 4, Informative) by VLM on Saturday February 17 2018, @04:38AM

      by VLM (445) on Saturday February 17 2018, @04:38AM (#639212)

      Classic particle physics detection.

      Nobody ever seen a mass XYZ particle, but you see weird things in graphs of stuff (quantity, mostly) vs energy.

      If you make a wall out of concrete and shoot an anti-tank round thru it you'll get a waste particle size graph thats mostly smooth-ish statistically.

      if you make a wall out of standard bricks and shoot an anti-tank round thru it you'll get a waste particle size graph with some ground up junk but also crazy spike at standard brick size.

      Nobody ever saw a brick, certainly not in a wall, but all the theory points to the wall being made of standard bricks in the latter.

      Likewise this game is theory predicts a crazy bump in the energy graph at 8.12345678 MeV if tachyons exist and look at that weird bump in the energy graph at 8.12345678 MeV... Nobody never saw nothing but it sure is one heck of a correlation.

      Personally tachyons are so weird that I don't think they exist but there's some numerology of a currently unknown system that happens to match the predicted value of the unlikely particle. Imagine developing a rather elaborate theory of "thunder is greek gods playing bowling with the stars" complete with a pretty realistic theory of acoustics (see the lightning, count by fives to get miles distant until thunder) and yes the "gods gone bowling" is all ridiculous but that doesn't mean the perfectly accurate acoustics stuff is wrong, it was just misapplied.

      If we're allowed to throw out crazy but cool ideas, it was some kind of binary star system gone wild where star 1 went bang behind star 2 (what are the odds?) and a couple light hours later the explosion from star 1 reached and set off star 2 and we're all thinking there was only one when we only see star 2, but certainly there was a star 1 and star 2.

      If you want hollywood script material, SN1987A was a SETI experiment gone wrong along the lines of getting a telegram from space "smack two heavy spheres of uranium metal together for a good time" as a method of keeping overly gullible young civilizations from screwing up the galactic empire. So they got the instructions to build a really nice dyson sphere or fusion reactor out of a SETI reception but its actually instructions to motivate gullible civilizations to blow up their star.

      OR another idea I've often proposed is intergalactic trolling as a form of SETI. We can generate cheap bright signals of weirdness so lets F with an entire galaxy of normies. We as humans could do it today by dumping weird isotopes into the sun, if I recall correctly. We could waste trillions of green-space-alien astronomer phd student research hours over millions of years, fairly cheaply, merely by tossing radioactive trash into the sun to get rid of it. If /pol/ or /b/ ever gets hold of a dyson sphere or even a small fraction of a dyson sphere, this kinda stuff is gonna happen, ya know.

  • (Score: 2) by maxwell demon on Saturday February 17 2018, @10:41AM

    by maxwell demon (1608) on Saturday February 17 2018, @10:41AM (#639285) Journal

    From here: [ucr.edu]

    The bottom line is that you can't use tachyons to send information faster than the speed of light from one place to another. Doing so would require creating a message encoded some way in a localized tachyon field, and sending it off at superluminal speed toward the intended receiver. But as we have seen you can't have it both ways: localized tachyon disturbances are subluminal and superluminal disturbances are nonlocal.

    But what the authors describes is exactly a superluminal "message" (the claimed tachyon pulse) from a localized disturbance (the supernova SN1987A).

    --
    The Tao of math: The numbers you can count are not the real numbers.
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