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HEP phenomenology joint Cavendish-DAMTP seminar

Europe/London
Virtual

Virtual

Joe Davighi (University of Cambridge), Rene Poncelet (Cambridge University)
    • 4:00 PM 5:00 PM
      Charting the Fifth Force Landscape 1h

      In recent years particle physics research has undergone somewhat of a phase transition, looking increasingly towards hidden sectors and the feebly interacting frontier. In this talk I will introduce a new approach to parameterising dark sector forces, underpinned by the Källén-Lehman representation, in which the effects of any general scalar fifth force are captured by a single positive-definite spectral function. Using this language, I will demonstrate how the effects of loop-level forces can be simply obtained, without needing to explicitly perform loop calculations. I will also show how experimental observables can be expressed in completely general terms, facilitating the straightforward extraction of limits to any specific model. Finally, I will discuss how this framework opens the possibility to speculatively probe violations of unitarity, causality or locality within hidden sectors.

      Speaker: Hannah Banks (DAMTP)