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A Probe of Planck Energy Physics

Published online by Cambridge University Press:  25 May 2016

F. Occhionero ,
S. Monastra ,
C. Baccigalupi  and
L. Amendo
F. Occhionero
Affiliation:
Osservatorio Astronomico di Roma Via del Parco Mellini 84, 00136 Roma - ITALY
S. Monastra
Affiliation:
Osservatorio Astronomico di Roma Via del Parco Mellini 84, 00136 Roma - ITALY
C. Baccigalupi
Affiliation:
Osservatorio Astronomico di Roma Via del Parco Mellini 84, 00136 Roma - ITALY
L. Amendo
Affiliation:
Osservatorio Astronomico di Roma Via del Parco Mellini 84, 00136 Roma - ITALY

Abstract

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Large scale voids are a very prominent feature in recent redshift surveys: here we attempt an explanation in terms of a first order phase transition occurring during the slow roll epoch of a two field inflation, a process where one field drives the slow roll while the other undergoes quantum tunneling through a potential barrier. The ensuing bubble like perturbations – nucleated at a number of e-folds N ≈ 55 before reheating – are thought to be the precursors of the voids we observe today, while the zero-point fluctuations of the inflaton are the small, Gaussian perturbations seen by COBE on the large angular scales.

If this is so, primordial bubbles must have left a trace on the CMB, unless Silk damping and/or early reionization have erased it. We predict this imprint to have power on small angular scales, ≈ 10 arcmin or ≈ ≈ 1000. Therefore the physics at the Planck energy may be tested astronomically both indirectly through the large scale structure and directly through the forthcoming high resolution MAP and Planck satellites.

Type
V. Cosmological Models
Information
Symposium - International Astronomical Union , Volume 183: Cosmological Parameters and the Evolution of the Universe , 1999 , pp. 297 - 302
Copyright
Copyright © Kluwer 1999 

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