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Science

Looking for Quark-Gluon Plasma? 52

Posted by michael from the under-the-sofa-cushions,-probably dept.
uctbruce writes "Following the June press release from Brookhaven National Lab, nuclear physicists from around the world are discussing the results of the 4 RHIC experiments (PHOBOS, STAR, PHENIX and BRAHMS), the New York Times ran an article on the Quark Matter conference in Oakland. Have we re-created the first microseconds of the big bang in the lab? (Have a look at the Google cluster of stories)"
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Looking for Quark-Gluon Plasma? More

Looking for Quark-Gluon Plasma?

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  • So are we making really short lived universes? (Score:4, Interesting)

    by kabocox ( 199019 ) on Thursday January 15, 2004 @03:23PM (#7988779)
    IF they actually are reproducing the moments, are they making a really short lived universes that die because the following moments didn't mimic the rest?

    Could each of these experiments create an another realty?

    • Re:So are we making really short lived universes? (Score:5, Informative)

      by Ayaress ( 662020 ) on Thursday January 15, 2004 @03:30PM (#7988894) Journal
      They've really only recreated a *possible* representation of the material makeup of the very early universe. The potential for learning about the Big Bang is pretty impressive from this, but it's really only a surface feature of the universe's beginning.

      The Big Bang wasn't just a bunch of material blasting outwards into space. It was space itself expanding out of what was, effectively, nothing (The laws of physics break in a singularity, which was what the universe was to begin with. Science can't say anything about it, since there's no proximate way to study or model it).

      Also, this plasma is still a form of matter, however torn-apart it is. The first picoseconds of the big bang were nothing but intense energy. Plasma formed after a short time, and eventually associated into "large" structures like protons and such. We're making this plasma.

      To think this is making a short-lived universe would be like thinking that making a bunch of smoke and throwing debris around would be making an explosion. It's not the Big Bang we're creating, but its product.
    • They're not creating a "Big Bang" so much as they're creating a super-hot state of matter... one in which quarks and gluons do not solidify such as they do in our "cool" universe that we live in... so basically, make stuff really hot and dense, quarks and gluons don't re-form because they're too hot... It has nothing to do with creating a universe... its just hot stuff. It is, however, possibly what matter looked like after the big bang (stuff was really hot).

  • Thank God we're still alive (Score:3, Interesting)

    by linuxkrn ( 635044 ) <gwatson@noSPaM.linuxlogin.com> on Thursday January 15, 2004 @03:45PM (#7989130)
    It's a wonder with all the experiments with fission, fusion, and now big bang that we are still alive.

    Don't get me wrong, I'm all for learning and experimenting but just scares me to think of the magnitudes these could have. We have always been experimenting with things we don't fully understand. It seems to be just a matter of time before someone ends up blowing an entire country off the face of the earth... or worse.

    • Save me Jebus (Score:2, Insightful)

      by Anonymous Coward
      You're right, we should limit the experimenting to only those things that are well understood.

      As opposed to investigating the unknown, we should create elaborate competing mythologies and kill all those who don't agree with us.

    • Re:Thank God we're still alive (Score:5, Insightful)

      by Anonymous Coward on Thursday January 15, 2004 @03:52PM (#7989241)
      Actually, of those three, the only one to pose a large-scale danger is fission.

      Fusion needs a lot of heat and pressure to occur. If a fusion chamber were to fail, the fusion would stop almost instantly, and a plume of hot hydrogen/helium would come out and rise upwards very quickly, where it would cool rapidly. The people near the reactor would be in serious danger, and an airplane directly over the plant may be in danger (Which is why it's a good idea to have no-fly zones over power plants in general), but people living a couple miles away would be safe as long as the fire department was running on time.

      This experiment is another simmilar thing. It's just a bunch of plasma in a chamber. If it gets out, it cools rapidly and dissipates. Dangerous if you're sitting on it, but nothing to worry about otherwise.

      Fission, on the other hand, can start cold, and even if it stops, the material you're left with is still radioactive. If fission stops, you just have a bunch of helium floating around, and it's not all that dangerous.

      • Re:Thank God we're still alive (Score:1, Insightful)

        by Anonymous Coward
        This experiment is another simmilar thing. It's just a bunch of plasma in a chamber. If it gets out, it cools rapidly and dissipates. Dangerous if you're sitting on it, but nothing to worry about otherwise.

        You make it sound like more than it is, unless by 'a bunch of plasma' you mean a microscopic speck. These experiments aren't 'recreating the big bang', that's just reporters trying to make it sound interesting because the don't really know enough about it to find it interesting for it's real value. Th
        • Well, then, even more to the point being made that it's so small. A microscopic speck of anything that isn't going to infect my central nervous system or try to pass from my kidneys to my bladder the hard way isn't anything I'm going to worry about.
      • Too much experimenting with god killed him off over a century ago. Now we just have some necrophiliacs fooling around with the remains to spook the rest of us who cling to a sentimental attachment to the "easy" explanations. Thank scientists for dispelling the kind of tribal superstitions which would otherwise have allowed the most warlike priests to kill the rest of us, probably before you and I were born. You can thank them by testing their work yourself - science is a DIY religion.

      • charmed life (Score:5, Interesting)

        by Doc Ruby ( 173196 ) on Friday January 16, 2004 @02:57AM (#7995757) Homepage Journal
        "There are some things Man wasn't meant to know, Homer - important things." - Ned Flanders

        During the Manhattan Project, some physicists feared that splitting the uranium atoms with a critical mass would start a chain reaction in the atmosphere, destabilizing all nuclei within reach, thereby consuming all the matter of Earth in a total mass->energy conversion. They guessed wrong. Out in Brookhaven (only about 0.00528s from me, as the photon flies), there were similar concerns a few years ago, prior to synthesis of the first all-strange quark matter, fearing a chain reaction turning the planet entirely strange. Also turned out to be merely a paper tiger. Now we're going for these exotic hi-energy plasmas. And our high-energy and exotic-order syntheses are only accelerating in their frequency of invention. Most of these researches are funded for weapons production, which values maximum destruction. How long will our luck hold out?

        • Re:charmed life (Score:5, Informative)

          by Alsee ( 515537 ) on Friday January 16, 2004 @08:22AM (#7996845) Homepage
          some physicists feared that splitting the uranium atoms with a critical mass would start a chain reaction in the atmosphere... a total mass->energy conversion

          The speculation was that it would ignite the nitrogen in the atmosphere. Not only was it immediately found to be nonsense, but it was pointless from the start. The universe has smacked the Earth around with astroids and comets that make nukes look like PopRocks candy.

          The Hiroshima blast was around 13 kilotons.
          The Chicxulub impact was around 100 billion kilotons.
          (Chicxulub was the impact that wiped out the dinosaurs, it generated tidal waves, it splattered the earth's crust, it darkened the skies with dust and smoke, but it certainly didn't start a "chain reaction" igniting the atmosphere or starting a mass-energy conversion.)

          synthesis of the first all-strange quark matter, fearing a chain reaction turning the planet entirely strange...
          Now we're going for these exotic hi-energy plasmas

          You forgot to mention the producing minature black holes.

          And none of it is exotic. The universe bombards the earth with cosmic rays several orders of magnitude more powerful than anything we can dream of cooking up in any collider we could build. There is a steady bombardment of "exotic strange matter" and "exotic hi-energy plasmas" and minature black holes raining down over your head every day.

          Our "high energy physicists" are nothing but little children playing with pop-guns. If this stuff was dangerous then they universe would wipe out the planet several times a day with it's big guns.

          -
        • I've heard rumors of a weapon that turns oxygen into water instantly. I would guess, drop a bomb on a bunch of people and drown them where they stand.

          It was never tested or something because they were afraid it would fuse all the O2 into H20 and everyone would die.

          Though i'm sure it's just a rumor. (glancing at tinfoil hat on desk)
          • I've heard rumors of a weapon that turns oxygen into water instantly.

            Eek! Burning Hydrogen! Run! Run!...Oh wait..it's gone.

          • Re:charmed life (Score:3, Informative)

            by Ayaress ( 662020 )
            Sorta-kinda-maybe. It actually was tested.

            Hell, for that matter, most colleges do the experiment in Chem 100.

            Here's what you do: Get a thin-walled container (a baloon works well), and put 2 liters of hydrogen (H2) and 1 liter of oxygen (O2) in it, rupture it, and set off a spark.

            You'll end up producing a puff of water vapor which will dissipate very quickly (You can't drown somebody with this unless you have millions of gallons or something). What does damage with a bomb like this is the shock wave.

            When

            • Re:charmed life (Score:4, Interesting)

              by HokieJP ( 741860 ) on Friday January 16, 2004 @01:38PM (#7999616)
              I agree with your description of the H/O reaction, but I think there are some problems with your last two statements.

              There are very good reasons why this isn't a practical weapon. First, the volumes required to do significant damage are huge. Imagine filling a 1,000lb bomb casing with Hydrogen and Oxygen. It wouldn't accomplish much. Of course, you could liquify it, but then your cost skyrockets. I think the closest thing to what you're discussing is the Fuel/Air explosive, which has the wholehearted endorsement of the defense industry.

              Second, if I were a pilot, and someone suggested to me that I fly around a combat zone with a cannister full of hydrogen and oxygen under my wing, I'd decline. Remember the Hindenberg? Centuries of development have given us explosives with higher activation energies.

              As to your closing statement: the universe is huge, and not at all homogenous. There are a great many things in it that haven't come anywhere near us in our planet's relatively brief existence. I'm not arguing for the atmosphere-liquification particle, I'm just saying that your reasoning is specious.

        • Re:charmed life (Score:2, Insightful)

          by Ayaress ( 662020 )
          Most of these researches are funded for weapons production, which values maximum destruction.

          It should be pointed out that the maximum destruction paradigm of war has passed. Thirty years ago, you couldn't get a nickle if your bomb wasn't at least 80 megatons, but look at most of the current arsenals. The largest weapons used are 20,000 pounds - ten tons. And the most heaviliy used weapons are ones that have a remarkably small yeild, and normally don't destroy entire buildings. Even during the Cold War,

      • Re:Thank God we're still alive (Score:5, Informative)

        by Scott Carnahan ( 587472 ) on Friday January 16, 2004 @07:33AM (#7996642) Homepage

        The people near the reactor would be in serious danger, and an airplane directly over the plant may be in danger

        Even this is doubtful. Because fusion is so efficient, there is no need for much plasma in a magnetic confinement reactor (current ignition attempts seem to work with densities on the order of 10^21/m^3 - about 1/10000 the particle density of the atmosphere at sea level), and should the walls fail, almost all of the excess thermal energy would be dissipated before the gas could leave the building. The main problem with a structural failure is the liberated magnetic field, which may throw chunks of metal around.

    • Re:Thank God we're still alive (Score:2, Interesting)

      by Anonymous Coward
      I'm all for learning and experimenting but just scares me to think of the magnitudes these could have.

      What the hell kind of mangled expression is that? An experiment does not generally "have" magnitudes. (Measurements and numbers have magnitudes.) An experiment may have implications or scope though.
    • I'm all for learning and experimenting but just scares me to think of the magnitudes these could have.

      Well, I answered a similar comment when this story was posted yesterday and my reply rated a score 4, so I'll just answer you with a copy and paste, chuckle :)

      it already happens countless times every day anyway. The Earth's atmosphere (and every object in the universe) is continuously bombarded by cosmic rays - atomic neuclei with orders of magnitude more energy more than we can muster in any accelerato


    • We have always been experimenting with things we don't fully understand.

      Yes, that's why people experiment with things, because they don't understand them. If we fully understood something, there'd be no need to experiment.

      Your objections seem a bit out of order. The particle experiments that are being done contain less energy than in a fastball, it's just highly concentrated.

      It's impossible for anyone to blow up anything more than the apparatus with a fusion experiment, as the reaction stops as soon

  • Good question (Score:5, Funny)

    by Transcendent ( 204992 ) on Thursday January 15, 2004 @04:57PM (#7990292)
    Have we re-created the first microseconds of the big bang in the lab?

    Yes! ..oh wait... how the hell would I know what the first few miliseconds actually were like?

    I think the only answer that you can respond with is "maybe."

  • Duplicate article (Score:4, Informative)

    by hcg50a ( 690062 ) on Thursday January 15, 2004 @05:40PM (#7990949) Journal
    This article has the same subject and some of the same references as this one [slashdot.org] from yesterday.

    • Re:Duplicate article (Score:5, Funny)

      by QEDog ( 610238 ) on Thursday January 15, 2004 @07:26PM (#7992218)
      "his article has the same subject and some of the same references as this one [slashdot.org] from yesterday."

      "Have we re-created the first microseconds of the big bang in the lab?"

      The /. editors once again have re-created the article for scientific purposes

  • Have we re-created the first microseconds of the big bang in the lab?

    If you recreated the first microseconds of the Big Bang, then none of us would be here....

  • clever consistency = homonculi? (Score:4, Insightful)

    by Doc Ruby ( 173196 ) on Friday January 16, 2004 @02:41AM (#7995686) Homepage Journal
    These plasmas are the beginning of production some of the finest quality of some of the subtlest characteristics of matter of which we are aware. Past revolutions of this kind gave us magnetic compasses from consistently oriented domains, optical lenses from consistently curved refraction interfaces, and lasers from consistently phased light. Each newly consistent material advance produced a revolution in mesoscopic properties, from aggregate subtle effects at the micro level. Even the oldest revolution of those I mentioned, in magnetism, is still underway at a rapid pace. Now that we are beginning to introduce order at the femtoscopic level, what novel properties of these classes of matter do you believe possible? Care to hazard a guess?
  • Brookhaven national lab why do you sport an 8 sided snowflake on your home page?Quarks also do a phase change at very slow speeds (Bose Einstein consendate).Both phase changes mark the borders to between normal and warped spacetime.And any elecromagnetic wave that traved 14 billion light years, has the right to tell lies in this universe.
  • These experiment may show them what exsisted in the early universe, but it doesn't begin to explain how or why it came to be. Furthermore science really can't explain how the big bang occured. The laws of physics break in a singularity, which was what the universe was to begin with. Science can't say anything about it, since there's no proximate way to study or model it

    This is just a way of saying that we can't explain why, but trust me we are right.

    Don't get me wrong I'm in favor of scientific discov

    • They didn't claim to have made what you say they did.

      They say that they made a small amount of matter in one of its earliest forms following the big bang.

      What can it tell them about the big bang? Well, we have this knolwege gap from about 10^-65 to 10^0 seconds as to what exactly was going on with subatomic particles. They it in with speculation, but they've never had any impirical clue how any of these exotic kinds of plasma and neutrinos they had populating the early universe would actually behave. If w
    • The experiments in question aren't supposed to explain how or why the universe exists. They're designed to increase our understanding of what it was like at earlier and earlier points in its development, and to improve our understanding of the fundamental nature of matter and energy.

      The problem is not that "The laws of physics break in a singularity". It's that understanding the Planck era (first 10E-40 seconds, I think) requires reconciling quantum theories with general relativity.

      And scientists don't

  • Sounds like a spam.... (Score:5, Funny)

    by dackroyd ( 468778 ) on Friday January 16, 2004 @11:23AM (#7997941) Homepage
    Looking for Quark-Gluon Plasma?

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  • Perhaps, its hard to tell until we merge quantum gravity with relativity before we know the physical laws of the universe completely.

    Kris Holland [mailto]

  • What shape are subatomic particles? I always used to think of them as spheres. Gravity seems to naturally shape things into spheres and disks, but gravity has almost no effect on atoms. I'm a little curious.

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