View source for Cross section

[[Category:Basic concept]]
[[Category:Wikipedia]]
The '''cross section''' for a given process is a measure for the rate of interactions that orininate from the process that can be quoted independently of the experimental set-up of the scattering experiment itself. 

Cross sections are measured in units of area, where the special unit ''barn'' (b) is used with prefixes. Cross sections at the [[LHC]] can range from hundreds of millibarns (the total cross section of proton-proton collisions) down to fb or smaller for rare processes that are still considered to be measurable.

== Learn more ==
* [https://en.wikipedia.org/wiki/Cross_section_(physics) Wikipedia article]