Abstract
We review the role of fundamental spin-0 bosons as bosonic coherent motion (BCM) in the Universe. The fundamental spin-0 bosons have the potential to account for the baryon number generation, cold dark matter (CDM) via BCM, inflation, and dark energy. Among these, we pay particular attention to the CDM possibility because it can be experimentally tested with the current experimental techniques. We also comment on the panoply of the other roles of spin-0 bosons--such as those for cosmic accelerations at early and late times.
Highlights
Recent cosmological observations [1, 2] confirm the eight decade old Zwicky’s proposal [3] that the Universe contains a large amount of dark matter (DM)
It is very interesting to note that fundamental spin-0 bosons have been employed to account for the mothers of atoms, cold dark matter (CDM) via bosonic coherent motion (BCM) [4], Dark energy (DE) via a transient cosmological constant [50,51,52,53,54], and even the vacuum energy needed for the high scale inflation [45,46,47]
We focus on CDM via BCM in this review because similar ideas can be applicable to DE and inflation models
Summary
Recent cosmological observations [1, 2] confirm the eight decade old Zwicky’s proposal [3] that the Universe contains a large amount of dark matter (DM). It is very interesting to note that fundamental spin-0 bosons have been employed to account for the mothers of atoms ( i.e., baryon number generation via the Affleck-Dine mechanism [49]), CDM via BCM [4], DE via a transient cosmological constant [50,51,52,53,54], and even the vacuum energy needed for the high scale inflation [45,46,47]. A Goldstone boson arising from breaking a global phase symmetry by the VEV v is a pseudoscalar field a defined as φ = v√+ s e ia/f , s = 0, a = [0, 2Nπ f ).
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