Tachyons and cosmology

Details Tachyons and cosmology Tachyons and cosmology

Apr 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976mnras.175..105n&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 175, Apr. 1976, p. 105-116.

Astronomy and Astrophysics

Astronomy

21

Astronomical Models, Big Bang Cosmology, Tachyons, Neutrinos, Particle Energy, Particle Mass, Photons

Scientific paper

The propagation of tachyons in an expanding universe is discussed. It is shown that a primordial tachyon in the big-bang universe cannot survive unless it had very large energy initially. In an indefinitely expanding universe, the tachyon trajectory turns back in time. This time barrier is found to exist even in the quantum-mechanical discussion of tachyons. This property is used to set limits on the mass of a tachyon. The possible astronomical checks on the hypothesis that neutrinos or photons may be tachyonic are also discussed.

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