1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

I Uncertainty principle

  1. Nov 10, 2016 #1
    For an unstable particle is it reasonable to take the uncertainty in energy as the energy it was created with? If so, why?
  2. jcsd
  3. Nov 10, 2016 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Education Advisor

    Your question is extremely puzzling. What "energy" are you talking about when you are referring to the "uncertainty in energy"?

    Secondly, muons are created in many different ways at many different energies. Yet, they have the same decay lifetime. So if you think that a muon's decay is dependent on the energy that was used to create it, then this should already answer your question.

    Thirdly, what do you mean by "unstable particle"? How "unstable" are we talking about here? A free neutron is unstable. Is this part of the particle that you want to know even though its lifetime is in minutes?

    There are many "baggages" surrounding this question that you have not explained.

  4. Nov 10, 2016 #3
    Apologies, I didn't really consider those things! Ok, so to clarify:
    The question was prompted by an example from a lecture. A delta baryon is produced with energy of 12,300MeV and its mean lifetime is calculated using the uncertainty principle. But the uncertainty in energy used in the calculation was simply the given energy of the delta baryon.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted