Vacuum Energy: "If Not Now, Then When?"

Details Vacuum Energy: "If Not Now, Then When?" Vacuum Energy: "If Not Now, Then When?"

2000-03-16

arxiv.org/abs/hep-ph/0003164v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

revision, extension of astro-ph/0002204, with one extra figure

Scientific paper

10.1016/S0375-9474(99)00733-2

For a flat universe presently dominated by static or dynamic vacuum energy, cosmological constant (LCDM) or quintessence (QCDM), we calculate the asymptotic collapsed mass fraction as function of the present ratio of smooth energy to matter energy $\rat=(1-\omm)/\omm$. Identifying these collapsed fractions as anthropic probabilities, we find the observed present ratio $\rat \sim 2$ to be likely in LCDM, but most likely in QCDM.

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