MG15 - Talk detail |
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Participant |
Calmet, Xavier | |||||||
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Institution |
University of Sussex - School of Mathematical and Physical Sciences - Brighton - East Sussex - United Kingdom | |||||||
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Session |
PT4 |
Accepted |
Yes |
Order |
3 |
Time |
15:55 | 20' |
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Talk |
Oral abstract |
Title |
Cosmological Evolution of the Higgs Boson's Vacuum Expectation Value | |||||
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Abstract |
We point out that the expansion of the universe leads to a cosmological time evolution of the vacuum expectation of the Higgs boson. Within the standard model of particle physics, the cosmological time evolution of the vacuum expectation of the Higgs leads to a cosmological time evolution of the masses of the fermions and of the electroweak gauge bosons while the scale of Quantum Chromodynamics (QCD) remains constant. Precise measurements of the cosmological time evolution of μ=me/mp, where me and mp are respectively the electron and proton mass (which is essentially determined by the QCD scale), therefore provide a test of the standard models of particle physics and of cosmology. This ratio can be measured using modern atomic clocks. |
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Pdf file |
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Session |
DM1 |
Accepted |
Yes |
Order |
3 |
Time |
16:10 | 30' |
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Talk |
Oral abstract |
Title |
Dark Matter from Quantum Gravity | |||||
| Coauthors | ||||||||
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Abstract |
Using effective field theory methods, I will show that quantum gravity predicts the existence of new degrees of freedom besides the massless spin-2 mode recently observed in the form of gravitational waves. This is a model independent prediction of quantum gravity which does not depend on the UV completion. I will show that these new degrees of freedom could account for dark matter. |
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Pdf file |
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