Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Δθ C plotted as a function of the azimuthal angle ϕ and fitted with θ xcos(ϕ)+θ ysin(ϕ), for one side of the RICH 2 detector. The left-hand plot is prior to alignment, and shows a dependency of the angle θ C on the angle ϕ. The right-hand plot is after the alignment correction, and Δθ C is uniform in ϕ
