Thermally modified sterile neutrino portal dark matter and gravitational waves from phase transition: The Freeze-in case

We consider the thermal effects into the evaluation of the dark matter production process. With the assistance of the right handed neutrinos, the freeze-in massive particle dark matter production history can be modified by the two-step phase transitions. The kinematic of decay/inverse decay or annihilation processes can be affected by the finite temperature effects as the Universe cools down. The history of the symmetry respected by the model can be revealed by the DM relic abundance evolution processes. The strong first order electroweak phase transition generated gravitational waves can be probed. The number of extra scalars for the Hierarchy problem can be probed through the Higgs off-shell searches at the LHC.Comment: 32 pages, 10 figures, comments welcom

The Promoting Role of Cultural Industry in “the Belt and Road” Initiative

The “soft power” function of the cultural industry in “the Belt and Road” is reflected in its connection with the “humanistic connotation”, “economic connotation” and “safety connotation” of “the Belt and Road”, and the construction of these three connotations can form the value and utility of the cultural industry in “the Belt and Road”. The three aspects of cultural value, commercial property and safety construction of “the Belt and Road” can really help the cultural industry play a role in “the Belt and Road” industrial chain. The way to promote the cultural industry can be summarized into three parts: the idea of cultivating the cultural industry, the construction of cultural product system and the construction of modern cultural park