Nucleosynthesis Constraints on a Scale-Dependent New Intermediate Range Interaction

Details Nucleosynthesis Constraints on a Scale-Dependent New Intermediate Range Interaction Nucleosynthesis Constraints on a Scale-Dependent New Intermediate Range Interaction

1999-02-23

arxiv.org/abs/hep-ph/9902439v1

Phys.Lett. B452 (1999) 108-114

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, Latex plus 2 eps figures. To be published in Physics Letters B

Scientific paper

10.1016/S0370-2693(99)00253-1

We derive constraints on the strength of a new intermediate range interaction that couples to baryon number from primordial nucleosynthesis yields. The nucleosysnthesis limits here used arise from matching observations and predictions of standard and inhomogeneous primordial scenarios. We show that the standard nucleosynthesis scenario is more restrictive ($\alpha_5 \lsim 0.2$) when the range of the interaction is greater than about 1 m. We further discuss the implications of considering the scalar particle responsible for the new interaction as the main component of the dark matter in the galactic halo such that its decay can account for the ionization of hydrogen in the interstellar medium and the temperature of Lyman-$\alpha$ clouds.

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