# Interpretation of the Bjorken x.

+ 3 like - 0 dislike
251 views

In the infinite momentum frame the Bjorken x, $x_B$, is interpreted as the longitudinal momentum fraction  of a nucleon carried by the struck parton. How can $x_B = \frac{Q^2}{2P.q}$ , where the symbols carry the usual meanings, be interpreted that way? What is the logic behind that interpretation? Could you please explain it in a rather intuitive way?

Hm I know the infinite momentum frame from some other context, so the symbols used here are unfamiliar to me at least... ?

Dear Dilation

In a deep-inelastic scattering process, $Q^2 = -q^2$ and P and are the four momenta of the nucleon and the virtual photon. Thanks.

Thanks, this already helps a bit. But thinking more about it I realize that I have some difficulties in figuring out what is the exact (scattering) process you are looking at? I do best understand things when they are pictured by Feynman diagrams, but I have not yet tried to produce them in LaTex, not sure if it would work here ...

Dear Dilation

The Feynman diagram will be the simplest in case of inclusive deep inelastic scattering: an electron scatters from a nucleon and only the electron is detected in the final state; for a deep inelastic process $Q^2 > 1 \mathrm{GeV^2}$. Thanks

 Please use answers only to (at least partly) answer questions. To comment, discuss, or ask for clarification, leave a comment instead. To mask links under text, please type your text, highlight it, and click the "link" button. You can then enter your link URL. Please consult the FAQ for as to how to format your post. This is the answer box; if you want to write a comment instead, please use the 'add comment' button. Live preview (may slow down editor)   Preview Your name to display (optional): Email me at this address if my answer is selected or commented on: Privacy: Your email address will only be used for sending these notifications. Anti-spam verification: If you are a human please identify the position of the character covered by the symbol $\varnothing$ in the following word:p$\hbar$ysicsO$\varnothing$erflowThen drag the red bullet below over the corresponding character of our banner. When you drop it there, the bullet changes to green (on slow internet connections after a few seconds). To avoid this verification in future, please log in or register.