Signals of New Physics in the Underlying Event

Understand

LHC searches for new physics focus on combinations of hard physics objects.

• In this work we propose a qualitatively different soft signal for new physics at the LHC - the "anomalous underlying event".
• Every hard LHC event will be accompanied by a soft underlying event due to QCD and pile-up effects.
• Though it is often used for QCD and monte carlo studies, here we propose the incorporation of an underlying event analysis in some searches for new physics.