1 / 13

A new era in fundamental physics

A new era in fundamental physics. Higgs: from theory to experiments. André França – Baku 2013. fundamental physics. separation of scales:. Nature has different degrees of freedom at each scale. . fundamental physics.

zeal
Download Presentation

A new era in fundamental physics

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. A new era in fundamental physics Higgs: from theory to experiments André França– Baku 2013

  2. fundamental physics separation of scales: Nature has different degrees of freedom at each scale.

  3. fundamental physics With enough energy, we can probe shorter length scales and discover more fundamental degrees of freedom.

  4. LHC, Geneva

  5. standard model of particle physics

  6. higgs discovery

  7. What is the Higgs boson? Why did we expect the Higgs? What comes next?

  8. quantum field theory 101 -> Particles are (quantum) excitations of a field theory. (classical) equations of motion: u(x,t) This is an example of a free wave – no potential energy and no interactions.

  9. quantum field theory 102 When a field excitation propagates, it creates disturbances in other fields. Example: A propagating electron creates a disturbance in the electromagnetic field – photon. Effects of interactions are given by a very complicated nonlinear wave equation. We use perturbation theory to compute probabilities.

  10. unitarity crisis If interactions are too strong: probabilities no longer add up to 1. This is what happens in the standard model without the Higgs. (Also, the theory is non-renormalizable. But you don’t want to hear about that.)

  11. higgsfield Particles interacting with the Higgs field become massive because of its vacuum expectation value. H(x,t) = v + h(x,t) Higgs boson Vacuum expectation value

  12. open questions What is beyond the standard model? Why is the Higgs mass so small? Will the LHC give us dark matter? What is dark energy? Where do neutrino masses come from? What is the quantum theory of gravity? Is there supersymmetry around the corner? What is the correct model of inflation? Where are the axions?

  13. conclusion It’s a very exciting era for particle physics! André França, LMU Munich.

More Related