[ NIKHEF theory group ]

Purpose

To meet, discuss, collaborate, generate ideas, share expertise, in the context of the FOM programme "Higgs as Probe and Portal"

We hope to see you here!

Agenda 20 April 2018

Time: 10.00 - 17.00
  • 10.25 - 11.00, H320:

    Andreas Papaefstathiou (UvA)
    The Higgs boson as a probe at hadron colliders

    Abstract: One of the main goals of our field is to understand electro-weak symmetry breaking (EWSB), in which the central protagonist is the Higgs boson. Both at the Large Hadron Collider and future colliders, the Higgs boson will be studied extensively. However, it can also be used as a probe for new phenomena. On the other hand, if new particles are discovered, the Higgs boson could be used to uncover their potential links to EWSB. This programme involves the study of either multiple Higgs bosons in a single event or associated production of Higgs bosons with other (new or SM) particles. In this talk I will be discussing the kind of information we could extract from such processes.



  • 11:00 - 12:00, H331
    Nikhef Colloquium:

    Chris Quigg (Fermilab)
    Title: "I would like to know …"

    Abstract: Thoughts on the evolution of particle physics



  • 13.00 - 13.30, H320
    Plot of the Month/Pie of the Month



  • 15.00 - 16.00, H320
    Student meeting/discussion:

    Jorinde van de Vis (Nikhef)
    Reheating the universe after inflation

    Abstract: Reheating is the process in which the energy of the inflaton field is transferred to the particles of the standard model. It bridges the large energy gap between inflation and Big Bang Nucleosynthesis and is therefore an important process to understand. I will start with a brief description of the behavior of the inflaton field during and after inflation and then give an example of perturbative decay to standard model particles. Even though the perturbative theory is important in the final stages of reheating, it can not describe the resonant effects that happen just after the end of inflation. Non-perturbative effects lead to very efficient particle production and thus modify the predictions of preheating significantly. I will give a few examples of these resonant processes.



  • 16.30 - 17.00, H320

    Rob Verheyen (Radboud University)
    Electroweak Radiation in Parton Showers

    Abstract: Parton showers are an important part of the Monte Carlo machinery used for simulations of high energy particle collisions. Traditionally, parton showers have described QCD radiation only. However, with increasing energies and precision, simulation of electroweak radiation should also be included. In this talk, I will discuss an implementation of QED radiation in the Vincia parton shower. I will show how the complicated structure of infrared divergences can be properly incorporated, as well as some details on the Monte Carlo implementation and results. Next, I discuss some of the issues with an extension to a full electroweak shower, and how we intend to tackle them.



  • 17.00 Borrel