Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1993-10-14
Phys.Rev. D49 (1994) 2114-2117
Physics
High Energy Physics
High Energy Physics - Phenomenology
9 pages, figure available by fax
Scientific paper
10.1103/PhysRevD.49.2114
The upper bound on the number of relativistic species present at nucleosynthesis has been used to constrain particles with electric charge $\epsilon e$ ($10^{-8} < \epsilon <1$). We correct the bound previously calculated for milli-charged particles that interact with a shadow photon. We also discuss the additional constraints from the properties of red giants and of Supernova 1987A.
Davidson Sacha
Peskin Michael
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