Constraining the variation of fundamental constants with tritium decays

Show simple item record

dc.contributor.author Fradette, Anthony
dc.date.accessioned 2012-12-20T18:56:34Z
dc.date.available 2012-12-20T18:56:34Z
dc.date.copyright 2012 en_US
dc.date.issued 2012-12-20
dc.identifier.uri http://hdl.handle.net/1828/4373
dc.description.abstract The consistency of fundamental constants is assumed in the Standard Model. However, new physics theories allow them to be dynamical. Different tests can be made at various epochs of the universe. In particular, current bounds at the time of emission of the Cosmic Microwave Background (CMB) permit variations up to 1% of their present values. A change of this order can produce an accumulation of tritium which would later decay and modify the ionization history of the Universe by up to O(0.1%). This Tritium Decay Scenario (TDS) can modify the CMB to an observable level and thus provides a new probe of Varying Fundamental Constants (VFC). We analyze the WMAP 7-year and SPT data with respect to the TDS and find no evidence for VFC. The data disfavors a portion of the parameter space at 95% Confidence Level (CL). We forecast the sensitivity of Planck to the TDS and find that a larger range of parameters can be excluded at 3σ CL. en_US
dc.language English eng
dc.language.iso en en_US
dc.subject Theoretical Physics en_US
dc.subject Particle Physics en_US
dc.subject Cosmology en_US
dc.title Constraining the variation of fundamental constants with tritium decays en_US
dc.type Thesis en_US
dc.contributor.supervisor Pospelov, Maxim
dc.degree.department Dept. of Physics and Astronomy en_US
dc.degree.level Master of Science M.Sc. en_US
dc.rights.temp Available to the World Wide Web en_US
dc.description.scholarlevel Graduate en_US

Files in this item

This item appears in the following Collection(s)

Show simple item record

Search UVicSpace


My Account