Speaker
Dr
Angelo Esposito
(EPFL Lausanne CH)
Description
We employ an effective field theory to study the detectability of sub-GeV dark matter through its interaction with the gapless excitations of superfluid 4He. In a quantum field theory language, the possible interactions between the dark matter and the superfluid phonon are solely dictated by symmetry. We compute the rate for the emission of one and two phonons, and show that these two observables combined allow for a large exclusion region for the dark matter masses. Our approach overcomes several limitations of standard techniques, and allows to compute differential distributions, hardly accessible otherwise. The method presented here is easily extendible to different models of dark matter.
Primary authors
Dr
Angelo Esposito
(EPFL Lausanne CH)
Prof.
Antonio Davide Polosa
(Sapienza University` di Roma)
Co-author
Ms
Francesca Acanfora
(Sapienza University` di Roma)
