Searching for Vector Wave Dark Matter with Levitated Magnetomechanics Analysis of a Hypothetical Direct Detection Experiment Using Levitating Superconductive Test Objects
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Typ
Examensarbete för masterexamen
Master's Thesis
Master's Thesis
Program
Physics (MPPHS), MSc
Publicerad
2023
Författare
Anduri, Måns
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
This master’s thesis investigates the sensitivity of a hypothetical direct detection
experiment using levitated magnetomechanics for a vector bosonic wave dark mat ter candidate. The sensitivity studies done is for masses between 1.24 · 10−13 eV
and 4.14 · 10−12 eV and with four different possible background terms, where the
background is assumed to be thermally based. The vector boson is described with
the Lagrangian, L = −
1
4
FµνF
µν−
1
2m2
DMAµAµ+gAµnγ¯
µn, and couples to the baryon
number minus the lepton number, thus yielding an EP-violating force on a charge neutral test object. Since it is ultralight it can be seen as a classical wave. To
measure the sensitivity, the exclusion and discovery limits for the coupling constant,
g, are asymptotically derived with the Asimov data set for 95% confidence interval
and the 5σ level respectively. The limits are plotted against the mass scanned over
and compared with the discovery limit for an optomechanical experiment for the
same dark matter candidate. It is shown that the sensitivity for the most optimistic
background is comparable with said experiment.
Beskrivning
Ämne/nyckelord
Asimov data set, direct detection, discovery limit, EP-violation, ex clusion limit, experimental sensitivity, levitated magnetomechanics, ultralight dark matter, vector boson, wave dark matter.