Berlin 2005 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 20: Kern- und Teilchen-Astrophysik
HK 20.3: Vortrag
Montag, 7. März 2005, 14:30–14:45, TU MA144
Heavy particle production in a conformal cosmological model — •David Blaschke1,2,3, Alexander Prozorkevich4, and Stanislav Smolyansky3,4 — 1Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, 141980, Dubna, Russia — 2Fakultät für Physik, Universität Bielefeld, D-33615 Bielefeld, Germany — 3Fachbereich Physik, Universität Rostock, Germany — 4Physics Department, Saratov State University, 410026, Saratov, Russia
In the framework of a conformal cosmological model, we consider the vacuum creation of heavy massive particles (vector bosons and top quarks). The inertial mechanism due to a time dependence of the conformal mass, m(t)=a(t)m0 (m0 is the present-day value of the mass) is the foundation of this effect. The function a(t) is the conformal factor of the isotropic FRW space-time, a(t)=(t/tH)α, where α=2/(3γ −2), γ is the barotropic parameter, tH = (1+α)H is the age of the Universe, H is the Hubble constant. We derive the corresponding kinetic equations of non-markovian type for the vacuum creation of massive vector bosons and fermions and we solve these KE’s numerically for different equations of state of the matter filling the Universe (stiff fluid, radiation etc.). The basic result of the work is demonstration of the fact that the general contribution of the produced matter can be sufficient to explain the present density of CMB photons. Partially supported by DFG Graduiertenkolleg 567 at Universität Rostock and DFG grant No. 436 RUS 117/78/04.