Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-12-22
Physics
High Energy Physics
High Energy Physics - Phenomenology
14 pages, 2 figures, to be published in the Proceedings of the Bled workshop on What comes beyond the Standard Model?, 19-30 J
Scientific paper
According to the multiple point principle, Nature adjusts coupling parameters so that many vacuum states exist and each has approximately zero vacuum energy density. We apply this principle to the general two-Higgs doublet extension of the Standard Model, by requiring the existence of a large set of degenerate vacua at an energy scale much higher than the presently realized electroweak scale vacuum. It turns out that two scenarios are allowed. In the first scenario, a CP conserving Higgs potential and the absence of flavour changing neutral currents are obtained without fine-tuning. In the second scenario, the photon becomes massive in the high scale vacua. We briefly discuss the resulting phenomenology.
Froggatt Colin D.
Laperashvili Larisa V.
Nevzorov R. B.
Nielsen Holger Bech
Sher Marc
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