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Astro & GW Colloquium

Weakly-interacting-slim-particle searches and the ALPS II experiment

Speaker: Dr Jan Pold (DESY, Germany)
Date: Wednesday 31 October 2018
Time: 14:00
Venue: Queens Buildings N/3.28

The standard model of particle physics (SM) precisely describes particles detected in collider experiments. However, there are astrophysical observations such as stellar evolution and the TeV-transparency that the SM does not explain. Weakly-interacting-slim-particles (WISPs) are theoretically predicted to extend the SM and could explain these astrophysical phenomena. Currently, there are worldwide efforts and a variety of experimental approaches to search for WISPs. ALPS II is an experiment that could detect WISPs and uses a light-shining-through-a-wall approach, where photons are converted to WISPs before an opaque wall and reconverted to photons behind the wall. To enhance the sensitivity ALPS II combines ultra stable laser sources, resonant optical enhancement techniques and a string of superconducting dipole magnets. The ALPS II experiment is currently being built at DESY in Hamburg. In this talk I will introduce different experimental approaches to search for WISPs. Furthermore, I will give a description of the ALPS II experiment and outline the current status.