Rejecting P and CP-invariance in scalar dark matter-nucleus interactions
Typ
Examensarbete för masterexamen
Program
Publicerad
2020
Författare
Hagel, Joakim
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
There is convincing evidence that a significant fraction of the mass in our Universe
consists of non-baryonic and non-luminous dark matter. The particles forming this
cosmological component have so far escaped detection, but are currently searched
for at direct detection experiments. These search for non-relativistic dark matternucleus
scattering events in low-background, deep underground detectors. In this
thesis, the properties of spin-0 dark matter-nucleus interactions under P and CPtransformations
are investigated, assuming that a dark matter signal has been observed
at direct detection experiments. Using an effective theory to describe these
interactions, the scattering events can be restricted to three cases: Conserving CP
and P; Conserving CP, but violating P; and violating both CP and P. By performing
a likelihood ratio test with simulated data, this thesis aims to determine how many
observed scattering events are required in order to discriminate one case from the
other in the next generation of direct detection experiments.
Beskrivning
Ämne/nyckelord
High Energy Physics , Dark Matter , Effective Theory , Direct Detection , P and CP-transformations