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Institute for Particle Physics Phenomenology

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Institute for Particle Physics Phenomenology

Description: 

The ATOMKI group has recently reported a surprising result in experimental measurements of a rare transition of Beryllium-8 nuclei, which shows what appears to be an unexpected resonant structure in the invariant mass of e+e- produced when the 18.15 MeV excited state decays to the ground state, which they interpret as a new particle of mass around 17 MeV and with ultra-weak couplings to the Standard Model. I will review the experimental results, and discuss possible interpretations as a previously unappreciated nuclear physics or a manifestation of physics beyond the Standard Model, and give outlook for future sources of information which can hope to shed light on the situation.

Type: 
Lecture
Category: 
CPT Colloquia
Date: 
28/11/2017
Location: 
Calman Centre
Timezone: 
Europe/London
EventChairs: 
Tim Tait
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