Scanning the Fluxless G_2 Landscape

Abstract

We show that there exists an exponentially large discretuum of vacua in G 2 -compactifications of M-theory without flux. In M-theory-inspired G 2 -MSSM, quantities relevant for particle physics remain virtually insensitive to large variations of the vacuum energy across the landscape. The purely non-perturbative vacua form a special subset of a more general class of vacua containing fractional Chern-Simons contributions. The cosmological constant can be dynamically neutralized via a chain of transitions interpolated by fractional gauge instantons describing spontaneous nucleation of M2-brane domain walls. Each transition is generically accompanied by a gauge symmetry breaking in some sector of the theory. In particular, the visible sector GUT symmetry breaking can likewise be triggered by a spontaneous nucleation of an M2-brane.

Increаsing the Nutritionаl Vаlue of Sugаr Cооkies With the Аddition Оf Nоn-Trаditional Rаw Mаterials

“…Функцианалдық мақсаттағы астық өнімдерін жасаудағы басым бағыт әртүрлі жармаларды пайдалану болып табылады және ұсақталған жарма өнімдерінен ұн қоспаларын жасау тиімді [1].…”

The string landscape: On formulas for counting vacua

“…However, when a manifold of G 2 holonomy has an A, D, or E singularity -that is, a singularity of the form C 2 /Γ where Γ is a finite, discrete subgroup of SU(2) -it is known via string dualities [17,18,19,15,16,20] that the four-dimensional physics contains a supersymmetric non-Abelian gauge theory with gauge group given by the ADE Lie group corresponding to the ADE singularity. Therefore, the study of compactification of M-theory on singular G 2 spaces could lead to potentially realistic physical theories; for recent examples, see [21,22,23,24,25].…”