Theory Division

The European Strategy in Particle Physics, has put an e+e- factory as first priority and recommended that Europe, together with its international partners, should investigate the technical and financial feasibility of a future hadron collider at CERN with a centre-of-mass energy of at least 100 TeV, and with an electron-positron Higgs and electroweak factory as... More »

Stimulated decays of axion dark matter, triggered by a source in the sky, could produce a photon flux along the continuation of the line of sight, pointing backward to the source. The strength of this so-called axion “echo” signal depends on the entire history of the source and could still be strong from sources that... More »

Enabling new long-lived particles (LLPs) searches at the LHC presents HEP research with unique opportunities. Introducing novel experimental techniques to identify and reconstruct LLPs will open up new possibilities for discoveries with striking signatures. I will present new  long-lived particles searches, with a focus on the CMS Muon System result, which significantly pushed the envelope... More »

I will discuss the prospects for the detection of astrophysical neutrinos and dark matter at future large-scale direct dark matter detection experiments. Focusing on neutrino signals, I will emphasize how this detection will improve upon our understanding of solar, atmospheric, and supernova neutrinos in this regime. I will connect these measurements to on-going terrestrial experiments... More »

Finetuned and unnatural theories do not violate any laws of nature. However, I wouldn’t bet on them. This talk tries to explain why.

Dimensional Regularization is one of the most commonly employed schemes for practical calculations in perturbative quantum field theories. High precision tests in particle accelerators require theoretical constraints which in principle need complicated multiloop calculations, accessible in the framework of Dimensional Regularization. In this scheme, however, the γ5 Dirac matrix needs to remain purely 4-dimensional in... More »

Current and next generation precision neutrino oscillation experiments aim to probe CP-violation in the lepton sector, the neutrino mass ordering, and physics beyond the Standard Model such as the existence of light sterile neutrinos by measuring the appearance of electron neutrinos in nearly pure beams of muon neutrinos. Yet to this day, only a handful of... More »

Quantum Computing offers the promise of ab initio determination of some real-time observables for quantum field theories that are not typically ascessible in Lattice QCD simulations. Typical quantum computers leverage qubits, 2-state objects, for computations. However, Hilbert spaces for many physical systems do not cleanly map to a power of 2 and have unused states... More »