Neutrinos from Dark Matter Annihilation in the Sun
Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Dark Matter (DM) is believed to consist ofWeakly Interactive Massive Particles (WIMPs)
which interact only through gravity and the weak nuclear force. These particles can become
trapped in gravitational wells such as the Sun and a theoretical value of the capture
rate can be calculated. At high particle density the WIMPs annihilating spontaneously
into Standard Model (SM) particles. Due to particle equilibrium the total annihilation
rate can be related to the capture rate by a simple expression. This report will focus on
calculating the capture rate and the related annihilation rate as well as calculating the
neutrino ux of the Sun. At rst we will give a brief introduction to cosmology and a
theoretical argument for the WIMPs as the prime DM candidate. Then we will look at
the theoretical background and the mechanism through which WIMPs become trapped
and evaporate or annihilate. Finally we will perform a numerical analysis of the WIMP
cycle within the Sun and calculate the capture rate for a variety of theoretical WIMP
masses. We will look at the capture rate due to scattering both by hydrogen nucleii and
by more massive elements. The Scattering by hydrogen will be the prime contributor to
the total capture rate and is the only spin dependent contribution.
Place, publisher, year, edition, pages
2013. , 23 p.
Dark Matter, WIMP annihilation, neutrino, the Sun.
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-127024OAI: oai:DiVA.org:kth-127024DiVA: diva2:643413
Ohlsson, Tommy, Professor