PIRSA:23120050

Video URL

https://pirsa.org/23120050

Scattering Interactions between Dark Matter and Standard Model Particles with Cosmology

Gandhi, S. (2023). Scattering Interactions between Dark Matter and Standard Model Particles with Cosmology. Perimeter Institute for Theoretical Physics. https://pirsa.org/23120050

Gandhi, Suroor. Scattering Interactions between Dark Matter and Standard Model Particles with Cosmology. Perimeter Institute for Theoretical Physics, Dec. 14, 2023, https://pirsa.org/23120050 

          @misc{ scivideos_PIRSA:23120050,
            doi = {10.48660/23120050},
            url = {https://pirsa.org/23120050},
            author = {Gandhi, Suroor},
            keywords = {Cosmology},
            language = {en},
            title = {Scattering Interactions between Dark Matter and Standard Model   Particles with Cosmology},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2023},
            month = {dec},
            note = {PIRSA:23120050 see, \url{https://scivideos.org/index.php/pirsa/23120050}}
          }

Suroor Seher Gandhi Perimeter Institute for Theoretical Physics

Talk numberPIRSA:23120050
DOI10.48660/23120050
Source RepositoryPIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

Linear cosmological observables, like the cosmic microwave background (CMB), 
offer a unique avenue to investigate the elusive properties of dark matter 
(DM) through its interactions with Standard Model (SM) particles. The 
precision of contemporary experiments has reached sub-percent-level accuracy 
(<1%), necessitating theoretical formalism of definitive accuracy to extract 
meaningful constraints on DM-SM interactions.
I will highlight theoretical assumptions made ubiquitously in deriving most 
constraints on DM-SM scattering interactions, which could potentially induce 
order ~1 errors--- a large margin of uncertainty for precision-cosmology. I 
will discuss the progress we have made toward finding better alternatives by 
developing the first exact implementations in well-defined, cosmologically 
relevant regions of parameter space to mitigate the errors induced by two 
widely adopted theoretical assumptions.
Our exact results provide points of reference that can help determine the 
regimes where current DM-SM scattering constraints can be trusted, and where 
we need better methods going forward. I will end by motivating a higher-order 
statistical formalism for DM-SM scattering with up to 100x greater 
sensitivity.

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Zoom link https://pitp.zoom.us/j/95952209469?pwd=TERqVlZsMVhvbzJqU1hsalhiUVYxdz09