Acoplanarity

In

For a two-jet final state, a useful measure of acoplanarity is

${\displaystyle \varphi =\pi -(\phi _{2}-\phi _{1})}$

where ${\displaystyle \phi _{i}}$ are the

where ${\displaystyle p_{i}}$ are the momenta of the final state particles and ${\displaystyle p_{out}^{i}}$ are the components of these momenta perpendicular to a plane chosen such that A is minimized.[1] In the case of two coplanar final state particles, the plane which minimizes A would contain the paths of both particles and the beamline, and A would equal 0.

See also

• Color confinement
• Asymptotic freedom
• Dijet event

References

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