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SR Kinetic Energy Mass Increase for Uncharged Particles?

  1. Jan 27, 2016 #1

    referframe

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    The mass of a particle will increase as its velocity increases according to special relativity. This has been confirmed in countless experiments in which particle accelerators accelerate charged particles.

    What type of experiments have confirmed this for uncharged particles?

    Thanks in advance.
     
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  3. Jan 27, 2016 #2
  4. Jan 27, 2016 #3

    referframe

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  5. Jan 27, 2016 #4

    jtbell

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    If energy and momentum did not vary with speed in the same way with uncharged particles as with charged ones, the folks at CERN would be in big trouble in the analysis of their experiments.
     
  6. Jan 27, 2016 #5

    referframe

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    Makes sense. Thanks.
     
  7. Jan 27, 2016 #6

    e.bar.goum

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    For example, nTOF at CERN. Relativistic uncharged particle experiments, as requested by the OP: http://home.cern/about/experiments/ntof
     
  8. Jan 27, 2016 #7

    referframe

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  9. Jan 27, 2016 #8

    bcrowell

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    A neutral object can be formed as a composite of charged objects, so it's hard to see how neutral and charged objects could obey different rules. For example, a neutron is actually a bound system made of three quarks, which are all charged. If you do an experiment with neutrons, and say, "hey, I've tested the kinematics of neutral particles," I could say, "no, you did an experiment with quarks, which are charged."
     
  10. Jan 28, 2016 #9

    Orodruin

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    I wrote it, it is exactly what it says. With relativistic mass becoming obsolete, there is only one mass which physicists really talk about (hence we never need to use the "rest" or "invariant" to prefix this mass). This mass does not change with velocity and is a relativistic invariant. The concept of relativistic mass fell out of fashion not only because it does not really have the properties you would expect from a mass, but also because there already is a quantity describing the same thing - the particle energy.
     
  11. Jan 28, 2016 #10

    Orodruin

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    The perhaps best test of the energy of a neutral massive particle growing unbounded as it approaches the speed of light would be neutrino time of flight experiments. We here have a neutral particle with a miniscule mass and no matter how much energy you put in, it does not pass the speed of light.
     
  12. Jan 28, 2016 #11

    Vanadium 50

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    If neutral and charged particles obeyed different kinematics, one could use the difference to determine absolute velocity.
     
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