Terminology of rho electroproduction

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Main Question or Discussion Point

Dear Forum,

I am trying to learn more about the electroproduction of rho meson off proton.
e + p -> e + p + rho

One of the commonly used kinematic variable is tprime, defined as t-tmin.

The definition I could find for tmin is that it is the minimal value of t kinematically
necessary to put rho and proton system on shell.

However I still do not know how it is calculated and what does 'putting the system
on shell' mean. More explanation will be greatly appreciated. Thanks for any response
you might have.
 

Answers and Replies

  • #2
malawi_glenn
Science Advisor
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on shell means that the particles beeing produced are real particles.
 

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