CERN Accelerating science

Article
Report number	hep-ph/0210012 ; CERN-TH-2002-265 ; CERN-TH-2002-265
Title	Antimatter regions in the baryon-dominated Universe
Author(s)	Khlopov, Maxim Yu. (Moscow Phys. Eng. Inst. ; COSMION, Moscow) ; Rubin, Sergei G. (Moscow Phys. Eng. Inst. ; COSMION, Moscow) ; Sakharov, Alexander S. (CERN ; Zurich, ETH)
Affiliation	(CERN)
Publication	2002
Imprint	1 Oct 2002
Number of pages	4
In:	14th Rencontres de Blois: Matter-antimatter Asymmetry, Blois, France, 17 - 22 Jun 2002, pp.403-406
Subject category	Particle Physics - Phenomenology
Abstract	Quantum fluctuations of a complex, baryonic charged scalar field caused by inflation can generate large domains, which convert later into antimatter regions. As a result the Universe can become globally matter-dominated, with minor contribution of antimatter regions. The distribution and evolution of such antimatter regions could cause every galaxy to be a harbour of an anti-star globular cluster. At the same time, the scenario does not lead to large-scale isocuvature perturbations, which would disturb observable CMB anisotropy. The existence of one of such antistar globular cluster in our Galaxy does not contradict the observed $\gamma$-ray background, but the expected fluxes of $\bar{\rm ^4He}$ and $\bar{\rm ^3He}$ from such an antimatter object are definitely accessible to the sensitivity of the coming AMS--02 experiment.

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Email contact: sakhas@particle.phys.ethz.ch