A proton-proton collision candidate event. On November 23 protons from two beams circulated at LHC and have collided at LHCb.

LHC news video youTube

LHCb control room at this historical moment.

LHCb November 23 pp collision video youTube, CDS

Tracks originate from the expected region inside LHCb Vertex Locator detector VELO.

Another proton-proton collision candidate event.

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