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!

Decay of a proton into a positron and a neutral pion

  1. May 10, 2014 #1
    p -> e+ + pi°

    is >10^33 years. what conservation law does this limit test?



    p is uud
    pi° is uu or dd where the second quark of each is an antiquark



    baryon number is not conserved 1 = 0 + 0
    charge is conserved
    lepton number is not conserved 0 = -1 + 0


    not sure what this question is getting at, please could someone give me a point in the right direction? thanks
     
  2. jcsd
  3. May 10, 2014 #2
    You already answered the question. If that decay is ever observed than the conservation of lepton number and Baryon number will both be violated so that limit is an expression of the validity of those conservations. Conservations are usually tested with limits like that.
     
  4. May 10, 2014 #3
    great, ok thanks for the reply!
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Decay of a proton into a positron and a neutral pion
  1. Pion Decay Process (Replies: 12)

  2. Pion Decay Angle (Replies: 25)

Loading...