Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-06-10
JETP Lett. 77 (2003) 335-338; Pisma Zh.Eksp.Teor.Fiz. 77 (2003) 403-406
Astronomy and Astrophysics
Astrophysics
Latex, 4 pages. The final version to appear in Pis'ma ZhETF (the conditions for the primordial binding are specified, some ref
Scientific paper
10.1134/1.1581955
Primordial superheavy particles, considered as the source of Ultra High Energy Cosmic Rays (UHECR) and produced in local processes in the early Universe, should bear some strictly or approximately conserved charge to be sufficiently stable to survive to the present time. Charge conservation makes them to be produced in pairs, and the estimated separation of particle and antiparticle in such pair is shown to be in some cases much smaller than the average separation determined by the averaged number density of considered particles. If the new U(1) charge is the source of a long range field similar to electromagnetic field, the particle and antiparticle, possessing that charge, can form primordial bound system with annihilation timescale, which can satisfy the conditions, assumed for this type of UHECR sources. These conditions severely constrain the possible properties of considered particles.
Dubrovich V. K.
Khlopov Maxim Yu.
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