Solving the Crisis in Big-Bang Nucleosynthesis by the Radiative Decay of an Exotic Particle

Details Solving the Crisis in Big-Bang Nucleosynthesis by the Radiative Decay of an Exotic Particle Solving the Crisis in Big-Bang Nucleosynthesis by the Radiative Decay of an Exotic Particle

1996-03-06

arxiv.org/abs/hep-ph/9603241v2

Phys.Rev.Lett. 77 (1996) 3712-3715

Physics

High Energy Physics

High Energy Physics - Phenomenology

Scientific paper

10.1103/PhysRevLett.77.3712

We discuss a new mechanism which can solve the crisis in standard big-bang nucleosynthesis. A long-lived particle $X$ ($10^4 sec \lesssim \tau_X \lesssim 10^6 sec$) which decays into photon(s) will induce cascade photons, and destroy significant amounts of D and $^3$He without destroying $^4$He or too much $^7$Li. We numerically investigate this process and derive a constraint on the properties of $X$ such that the theoretical values of the primordial light-element abundances agree with observation. We also present some candidates for the unstable particle $X$.

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