Τίτλος:
Graviton production from extra dimensions
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
Graviton production due to collapsing extra dimensions is studied. The momenta lying in the extra dimensions are taken into account. A D-dimensional background is matched to an effectively four-dimensional standard radiation-dominated universe. Using observational constraints on the present gravitational wave spectrum, a bound on the maximal temperature at the beginning of the radiation era is derived. This expression depends on the number of extra dimensions, as well as on the D-dimensional Planck mass. Furthermore, it is found that the extra dimensions have to be large. © 2002 The American Physical Society.
Περιοδικό:
Physical Review D: Particles Fields Gravitation and Cosmology
Λέξεις-κλειδιά:
article; astronomy; calculation; cosmic radiation; cosmos; gravity; model; spectrum; temperature; theory
DOI:
10.1103/PhysRevD.66.104005
