Profound evidence for the existence of dark matter has been collected throughout the past 100 years. However, its exact nature remains elusive. A large effort is being put into the search for direct detection of weakly interacting massive particles (WIMPs), which arise as dark matter particle candidates in various theories. The search is led by dual-phase liquid xenon time projection chambers...
We use data from cosmological survey to jointly reconstruct phenomenological functions of redshift describing departure of dark energy from the cosmological constant and possible modified gravity effects in the evolution of large scale structure. I will focus on the dependence of such reconstructions on the underlying assumptions and their implications for dark energy and modified gravity theories.
The calculation of tunneling actions, that control the exponential
suppression of the decay of metastable phases (like the unstable
electroweak vacuum), can be reformulated as an elementary variational
problem in field space. This alternative approach circumvents the use of
bounces in Euclidean space by introducing an auxiliary function, a
tunneling potential Vt that connects smoothly the...