Skip to main content Skip to navigation

PhD Studentship on ATLAS 2021: Higgs to tau CP

Higgs boson measurements:

The standard model is known to be incomplete in several ways. One of those is the absence of suffient CP violation to explain the matter-antimatter asymmetry in the Universe. A very exciting possibility is electro-weak baryogenesis, which would require modifications to the Higgs potential, and probabaly more Higgs bosons. It could show up via CP violating or other effects in the Higgs boson discovered in 2012.

Current measurements of the Higgs boson often assume its kinematic properties to be consistent with the Standard Model prediction. Differential cross-section measurements are performed to decrease the model dependence on the Standard Model. With the unprecedented dataset recorded with the ATLAS detector in Run 2 first differential measurements of the vector-boson fusion production mode can be set up in the decay of the Higgs boson to two tau leptons. Interesting distributions are the transverse momentum of the Higgs boson testing the Higgs boson coupling or the angle between the two leading jets testing the CP invariance of the Higgs boson.

A Ph.D. on ATLAS involves taking on a responsibility for detector operations or upgrade. The Warwick group is involved in building the ITk tracker to replace the current ATLAS tracking system in 2026, and the student will be expected to join in this work.