Where can antimatter be hidden in the universe

Details Where can antimatter be hidden in the universe Where can antimatter be hidden in the universe

Nov 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979natur.282..194b&link_type=abstract

Nature, vol. 282, Nov. 8, 1979, p. 194, 195.

Astronomy and Astrophysics

Astronomy

1

Antimatter, Baryons, Big Bang Cosmology, Black Holes (Astronomy), Matter (Physics), Symmetry, Astronomical Models, Charged Particles, Theoretical Physics

Scientific paper

The assumption of the initial symmetry of baryon charge in the universe leads to the conclusion that there must be unobservable regions of space which contain as much antimatter as the matter in the observable universe. In the present paper, it is proposed that in the early universe, extra antibaryons were collected by primordial black holes, due to fluctuations in the density of the baryonic charge. It is shown that if the universe is closed, the ratio of the energy density of unobservable matter to observable matter could reach 2000, and the probability that a given primordial black hole contains extra antibaryons is estimated. It is noted that the rather unlikely possibility that primordial black holes were created asymmetrically can be considerably increased if matter at the early stages satisfied a nonideal equation of state.

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