The Weak Scale at a Crossroad: Lessons from the LHC and Beyond

27 May - 21 June 2019

Tim Cohen, Csaba Csaki, Matthew McCullough, Andreas Weiler

The Large Hadron Collider (LHC) essentially functions as the world's largest "microscope". By colliding protons at energies approaching 14,000 times their mass, and carefully analysing the shrapnel that results, the smallest scales ever accessible are probed in a laboratory setting.

By 2019 the LHC will reach an important milestone: it will conclude its Run 2 after collecting well over 100 fb-1 of 13 TeV data, and will go into a long shutdown before it returns with even higher luminosity.

The primary goal of this programme will be to bring together the particle physics community to fully synthesise the results of this highly anticipated data set. Ideally, there would be hints of new physics to drive the discussions, but the absence of such signals is also a strong indicator of how Nature behaves at the fundamental level. We plan to discuss all aspects of LHC collider physics, including Higgs properties, constraints on BSM modes, specific searches for top partners, supersymmetry, displaced vertices, and more. We will consider the status of the models predicting new physics at the LHC and, in case of observed signals, focus on the ones suggested by the experiments. In the absence of signals, we will also be re-evaluating the status of naturalness (the main principle used for arguing for the existence of new physics around the TeV scale), by considering models that could have plausibly evaded detection thus far as well as new alternatives. We also expect the first robust set of new flavour results to appear from Belle II by the summer of 2019, which may decide the fate of the current flavour anomalies, or perhaps provide new ones. Finally, dark matter detection is a leading alternative to the LHC for discovering BSM physics. Should interesting experimental results or new theoretical paradigms emerge on these fronts we will focus on the particle physics aspects of such discoveries.

The programme is preceded by the programme "Beyond the Standard Model with precision flavour experiments". If you are planning a consectutive stay in both programmes, please register for both separately. The two weeks minimum participation then applies to your combined stay.