Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

What is boost supposed to mean?

  1. Jul 25, 2014 #1

    ChrisVer

    User Avatar
    Gold Member

    What does it mean to boost something along the z axis?
    To give some acceleration to it, or to spatially translate it? I think it's the 2nd?
     
  2. jcsd
  3. Jul 25, 2014 #2

    Vanadium 50

    User Avatar
    Staff Emeritus
    Science Advisor
    Education Advisor

    To change its velocity.
     
  4. Jul 25, 2014 #3

    ChrisVer

    User Avatar
    Gold Member

    then what does it have to do with momentum (generator of spatial translations)?
     
  5. Jul 25, 2014 #4

    Matterwave

    User Avatar
    Science Advisor
    Gold Member

    Can you be more specific? A boost (or any Lorentz transformation, for that matter) ##\Lambda_{~~\nu}^\mu## changes the momenta of particles in a predictable fashion:

    $$p'^\mu =\Lambda_{~~\nu}^\mu p^\nu$$
     
  6. Jul 25, 2014 #5

    WannabeNewton

    User Avatar
    Science Advisor

    A boost corresponds to Lorentz transformations that aren't spatial rotations. They correspond to ##K_i= J_{0i}## where ##J## are the Lorentz generators. The momentum of a massive particle defines a preferred boost axis.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: What is boost supposed to mean?
  1. What's the meaning of? (Replies: 0)

Loading...