2011/01/31 by Tianjun Li, James A. Maxin, Dimitri V. Nanopoulos +1
Physics and Astronomy · #Anthropic principle #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Extra dimensions #Higgs boson #Large Hadron Collider #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Quantum mechanics #String theory #Supergravity #Supersymmetry #Theoretical physics #Universe #astro-ph.CO #hep-ex #hep-ph #hep-th
paper · pdf · doi:10.1103/physrevd.84.056016
published as Phys.Rev.D84,056016 (2011) · PRD Version, 13 pages, 8 figures, 1 table
openalex publication_date 2011/09/30 · arxiv created 2012/01/16 · arxiv updated 2015/03/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We present a contemporary perspective on the String Landscape and the Multiverse of plausible string, M- and F-theory vacua. In contrast to traditional statistical classifications and capitulation to the anthropic principle, we seek only to demonstrate the existence of a nonzero probability for a universe matching our own observed physics within the solution ensemble. We argue for the importance of No-Scale Supergravity as an essential common underpinning for the spontaneous emergence of a cosmologically flat universe from the quantum ``nothingness.'' Concretely, we continue to probe the phenomenology of a specific model which is testable at the LHC and Tevatron. Dubbed No-Scale F\mathrm\text\ensuremath-SU(5), it represents the intersection of the Flipped SU(5) Grand Unified Theory (GUT) with extra TeV-Scale vectorlike multiplets derived out of F-theory, and the dynamics of No-Scale Supergravity, which in turn imply a very restricted set of high-energy boundary conditions. By secondarily minimizing the minimum of the scalar Higgs potential, we dynamically determine the ratio tan\ensuremathβ\ensuremath≃15--20 of up- to down-type Higgs vacuum expectation values (VEVs), the universal gaugino boundary mass M1/2\ensuremath≃450 GeV, and, consequently, also the total magnitude of the GUT-scale Higgs VEVs, while constraining the low-energy standard model gauge couplings. In particular, this local minimum minimorum lies within the previously described ``golden strip,'' satisfying all current experimental constraints. We emphasize, however, that the overarching goal is not to establish why our own particular universe possesses any number of specific characteristics, but rather to tease out what generic principles might govern the superset of all possible universes.