Inflationary Cosmology

Observable gravity waves from supersymmetric hybrid inflation

“…In SUGRA hybrid inflation with a minimal Kähler potential, this problem is eliminated by a fortuitous cancellation of the troublesome mass term with a term arising from the superpotential [2,5]. Generalizing to a non-minimal form of the Kähler potential introduces a new mass term for the inflaton, whose contribution cannot be suppressed for κ S non-negligible.…”

“…Supersymmetric (SUSY) models of hybrid inflation [1,2,3,4,5,6] are enticing due to their ties to grand unified theories (GUTs) and mainstream particle physics. In addition to utilizing the pervasive framework of SUSY, these models naturally incorporate the breaking of a gauge group G into the inflationary mechanism, whether at the end of inflation (standard scenario) or during inflation (shifted scenario [7,8]).…”

Massive particle decay and cold dark matter abundance

“…for x < x RH , evolution of n φ can be approximated, using the exact solution of Eq. (2.1) [30], the entropy conservation law and the time-temperature relation [36] in a RD era, as follows (the ratio x RH /x I can be safely ignored): …”

AdS/CFT Correspondence and the Reheating of the Brane-Universe

“…In this background the RR form is 2) and the dilaton field takes the form e Φ = H (3−p)/4 p . Taking the near horizon limit of the above geometry, we recover the Schwarzschild-AdS 5 × S 5 black hole geometry discussed in the previous section.…”

“…However, it is very difficult to produce a complete theoretical model where all the inflationary dynamics comes out in a consistent way from the theory [2]. Specifically, understanding the mechanism of the exit from inflation and reheating is of fundamental interest in the inflationary scenario.…”