Charting the Fifth Force Landscape

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• Hannah Banks (DAMTP)
• Thursday 03 December 2020, 16:00-17:00
• Virtual Seminar .

If you have a question about this talk, please contact Joseph Davighi.

The seminar will take place via vidyo here. The explicit url is: https://indico.cern.ch/event/980408/.

Abstract: 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.

This talk is part of the HEP phenomenology joint Cavendish-DAMTP seminar series.

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