hahaha~! I haven't seen you in class for a few days! I thought you might have dropped out, but when I saw your screen name I knew who you were! I'll send you an email next time !
uhh.. you may want to clarify this post... What exactly are you asking?
--save the copy and paste, retype clearly what the problem is, and WHICH of the problems would you like help with: #002 or #003 or #004? if you can, include the diagram of the corresponding problem.
and lastly...
I'm certain you are correct about the subscripts, that's pretty standard notation.
The relations:
∂pj/∂pi = δij
&
∂pj/∂ri = 0
I BELIEVE are essentially just stating the independence of each component of p & r, that is... pi does not depend on pj ∀ i ≠j and pi has no dependence on...
Homework Statement
Calculate the photon energy threshold for the reaction γ + p → p + π. Assume that the initial state proton is stationary.
<thats really it>
Homework Equations
< unknown, but suspects include: standard special relativity equations >
-- other useful relations:
proton rest...