PIRSA:16050005

A (Nearly) Weaker-Than-Gravity Bound on Dark Matter Electromagnetism

Mardon, J. (2016). A (Nearly) Weaker-Than-Gravity Bound on Dark Matter Electromagnetism. Perimeter Institute. https://pirsa.org/16050005

Mardon, Jeremy. A (Nearly) Weaker-Than-Gravity Bound on Dark Matter Electromagnetism. Perimeter Institute, May. 10, 2016, https://pirsa.org/16050005 

          @misc{ pirsa_PIRSA:16050005,
            doi = {10.48660/16050005},
            url = {https://pirsa.org/16050005},
            author = {Mardon, Jeremy},
            keywords = {Particle Physics},
            language = {en},
            title = {A (Nearly) Weaker-Than-Gravity Bound on Dark Matter Electromagnetism},
            publisher = {Perimeter Institute},
            year = {2016},
            month = {may},
            note = {PIRSA:16050005 see, \url{https://pirsa.org}}
          }

Jeremy Mardon

Stanford University

Talk number
PIRSA:16050005
Collection
Talk Type
Subject
Abstract

An unbroken U(1)' is a minimal possibility for a dark matter self interaction, and may even be associated with dark matter stability. However, such an interaction faces incredibly strong constraints due to collective plasma effects, which dominate over 2-to-2 scattering by an order-of-magnitude of orders-of-magnitude. I will discuss the physics of these collective effects, and show preliminary results of simulation. The constraint of such a self interaction is estimated to be nearly as weak as gravity.