Difference between Y-Bjorken and X-Bjorken

[matthew82]

Hi everybody,
this is my first post. So sorry for the possible trivial question.
Can someone explain me what is Y-bjorken?
And what is the difference with X-bjorken?

Thanks

 

[NEILS BOHR]

Bjorken X is a scaling variable used in deep inelastic scattering..for more info on this experiment see this:

http://ikpe1101.ikp.kfa-juelich.de/briefbook_part_detectors/node42.html#41

It gives the momentum fraction carried by an inclusively observed particle. Structure functions are mainly dependent on this variable.

 

[bcphysicist]

Bjorken discovered what is known as light-cone scaling, (or "Bjorken scaling") a phenomenon in the deep inelastic scattering of light on strongly interacting particles, known as hadrons (such as protons and neutrons)... think that's what you're looking for.

 

[daqpan]

I have a question related to the Bjorken Y-variable which I don't believe has been covered by the link so far. How does one calculate the scattering angle $\theta[\latex] from the Bjorken Y variable?$