16,037 research outputs found
Including the Fermion Vacuum Fluctuations in the flavor Polyakov Quark Meson Model
We consider the flavor Polyakov Quark Meson Model and study the
effect of including fermion vacuum fluctuations on the thermodynamics and phase
diagram. The resulting model predictions are compared to the recent QCD lattice
simulations by the HotQCD and Wuppertal-Budapest collaborations. The variation
of the thermodynamic quantities across the phase transition region becomes
smoother. This results in better agreement with the lattice data. Depending on
the value of the mass of the sigma meson, including the vacuum term results in
either pushing the critical end point into higher values of the chemical
potential or excluding the possibility of a critical end point altogether.Comment: 15 figures, some parts rewritten, new figures adde
Clockworking FIMPs
We study freeze-in dark matter production in models that rely on the
Clockwork mechanism to suppress the dark matter couplings to the visible
sector. We construct viable scalar and fermionic dark matter models within this
Clockwork FIMP scenario, with several subtleties that need to be taken into
account revealed in the model-building process. We also provide analytic,
semi-analytic and numerical results for the diagonalization of Clockwork-type
mass matrices and briefly discuss the LHC phenomenology of the corresponding
scenarios.Comment: 27 pages, 3 figures. Some typos in the appendices corrected. Accepted
for JHE
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