Search for black holes and sphalerons in high-multiplicity final states in proton-proton collisions at $\sqrt{s} =$ 13 TeV

Understand

A search in energetic, high-multiplicity final states for evidence of physics beyond the standard model, such as black holes, string balls, and electroweak sphalerons, is presented.

• The data sample corresponds to an integrated luminosity of 35.9 fb$^{-1}$ collected with the CMS experiment at the LHC in proton-proton collisions at a center-of-mass energy of 13 TeV in 2016.
• Standard model backgrounds, dominated by multijet production, are determined from control regions in data without any reliance on simulation.
• No evidence for excesses above the predicted background is observed.