Evolution of gravitational waves through the cosmological QCD transition

Details Evolution of gravitational waves through the cosmological QCD transition Evolution of gravitational waves through the cosmological QCD transition

1997-09-12

arxiv.org/abs/gr-qc/9709027v2

Mod.Phys.Lett. A13 (1998) 2771-2778

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

10 pages, LaTeX2e, 1 figure; analytic estimate for the modification of the spectral slope near f_* added, minor changes to imp

Scientific paper

10.1142/S0217732398002941

The spectrum of gravitational waves that have been produced in inflation is modified during cosmological transitions. Large drops in the number of relativistic particles, like during the QCD transition or at $e^+e^-$ annihilation, lead to steps in the spectrum of gravitational waves. We calculate the transfer function for the differential energy density of gravitational waves for a first-order and for a crossover QCD transition.

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