Slashdot Mirror


Tiny Particle With No Charge Discovered

ZonkerWilliam writes to mention PhysOrg is reporting that a tiny particle with no charge, called an 'axion' has been discovered. From the article: "The finding caps nearly three decades of research both by Piyare Jain, Ph.D., UB professor emeritus in the Department of Physics and lead investigator on the research, who works independently -- an anomaly in the field -- and by large groups of well-funded physicists who have, for three decades, unsuccessfully sought the recreation and detection of axions in the laboratory, using high-energy particle accelerators."

3 of 280 comments (clear)

  1. Re:Detected... by P3NIS_CLEAVER · · Score: 5, Informative

    FTFA-

    "They didn't know how to handle the detector for short-lived particles," Jain said. "I knew that for this very short-lived particle -- 10-13 seconds -- the detector must be placed very near the interaction point where the collision between the projectile beam and the target takes place so that the produced particle doesn't run away too far; if it does, it will decay quickly and it will be completely missed. That is what happened in most of the unsuccessful experiments." Instead, Jain used a visual detector, made of three-dimensional photographic emulsions, which act as both target and detector and that therefore can detect very short-lived particles, such as the axion. However, use of such a detector is so specialized that to be successful, it requires intensive training and experience. In the 1950s, Jain was trained to use this type of detector by its developer, the Nobel laureate, British physicist Cecil F. Powell. Jain has used it throughout his career to successfully detect other exotic

    --
    Please sign petition to restore sanity to our banking system!!!

    http://financialpetition.org/
  2. Re:Detected... by Aglassis · · Score: 5, Informative

    "The wake of a bullet going through ballistics gel is due to the electromagnetic force."
     
    And the Universe is powered by stupidity. The wake of a bullet going through ballistics gel is caused by the shockwave of the bullet's impact with the surface of the gel; a bullet is not a charged particle, nor magnetic, and it's way to big to create the ionization effects that traditional particle detectors use. I don't know how it is possible that, not only could say that a bullet causes a wake due to electromagnetic force, but that a mod actually believed that bullshit. Thank you for your comment. I am happy you are interested in physics. There are 4 forces: electromagnetism, gravity, the strong nuclear force, and the weak nuclear force. Please feel free to tell me which forces you believe allow the shockwave of a bullet to develop. Be as technical as you wish (I have extensive experience in advanced physics). I will give you a hint though: particles that have a net neutral charge can still interact electromagnetically whenever the distances between the interacting charges isn't assumed to be infinite (think dipoles).

    I hope this is a good learning experience for you and I hope that you don't recklessly call other posters stupid next time.

    --
    Suddenly, the hairy finger of a familiar monkey tapped me on the shoulder. It was time.--G. T.