• Home
  • Nuclear
  • Advances in Modern Cosmology by Adnan Ghribi

Advances in Modern Cosmology by Adnan Ghribi

By Adnan Ghribi

Show description

Read or Download Advances in Modern Cosmology PDF

Similar nuclear books

The Physics of the Manhattan Project

The advance of nuclear guns throughout the ny venture is likely one of the most important clinical occasions of the 20th century. This booklet, ready through a talented instructor of physics, explores the demanding situations that confronted the participants of the big apple venture. In doing so it offers a transparent advent to fission guns on the point of an upper-level undergraduate physics pupil.

Additional info for Advances in Modern Cosmology

Sample text

These calculations show that dark matter density decreased over the history of the Universe due to expansion of space and annihilation between dark matter particles and anti-particles. At some temperature in the early Universe, known as the freeze-out temperature, the density of dark matter decreased to the point that annihilation became negligible to the further evolution of the density, which is now dominated by expansion. What remains today is called the relic abundance, or relic density, of dark matter.

B133 (1983) 61 [56] S. Kachru, R. Kallosh, A. Linde and S. P. Trivedi, Phys. Rev. -I. Maeda, Phys. Rev. L. -I. Maeda, Phys. Lett. B245 (1990) 348 [59] M. A. , Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables, New York, Dover, 1972, p. A. D. A. Starobinsky, Phys. Lett. A. Starobinsky, JETP Lett. D. Sakharov, Pis’ma ZhETF 5 (1967) 32 [63] M. Dine and A. Kusenko, Rev. Mod. Phys. 76 (2004) 1 [64] W. D. Peccei and T. Yanagida, Ann. Rev. Nucl. Part. Sci. 55 (2005) 311 [65] M.

101) that (+) f2 <0 and (−) f2 >0 (103) Then the stability condition (82) is obeyed for any value of R. As regards the (−)-case, there are two possibilities depending upon the sign of f 1 . Should f 1 be positive, all the remaining stability conditions are automatically satisfied, ie. in the case of both (−) f2 (−) > 0 and f 1 > 0. F() Supergravity and Early Universe: the Meeting Point F (R) Supergravity and Early Universe: the Meeting Point of Cosmology and High-Energy Physicsof Cosmology and High-Energy Physics 21 19 (−) Should f 1 be negative, f 1 < 0, we find that the remaining stability conditions (100) and (102) are the same, as they should, while they are both given by 192 f 12 3 · 5 f 12 f = − − 32 0 ≡ Rins max f2 23 · 11 f 22 23 · 11 f 22 R < Rmax − (104) As regards the (+)-case, eq.

Download PDF sample

Rated 4.79 of 5 – based on 45 votes