In theoretical physics, the hierarchy problem is the problem concerning the large discrepancy between aspects of the weak force and gravity. There is no...

A hierarchy (from Greek: ἱεραρχία, hierarkhia, 'rule of a high priest', from hierarkhes, 'president of sacred rites') is an arrangement of items (objects...

these explanations is proven. This is known as a hierarchy problem. More broadly, the hierarchy problem amounts to the worry that a future theory of fundamental...

computational complexity theory, the polynomial hierarchy (sometimes called the polynomial-time hierarchy) is a hierarchy of complexity classes that generalize...

decision problem into a hierarchy of more easily comprehended sub-problems, each of which can be analyzed independently. The elements of the hierarchy can...

from 12:00 to 18:00, Arkani-Hamed gives a brief discussion of the relation between the doublet–triplet splitting problem and the hierarchy problem.)...

relative to the other fundamental forces of nature, thus solving the hierarchy problem. In the brane picture, the electromagnetic, weak and strong nuclear...

explain certain phenomena, such as the nature of dark matter and the hierarchy problem in particle physics. A supersymmetric theory is a theory in which...

In mathematical logic, the arithmetical hierarchy, arithmetic hierarchy or Kleene–Mostowski hierarchy (after mathematicians Stephen Cole Kleene and Andrzej...

Notably, supersymmetric particles aim to solve the hierarchy problem, axions address the strong CP problem, and various other particles are proposed to explain...

model is a braneworld theory developed while trying to solve the hierarchy problem of the Standard Model. It involves a finite five-dimensional bulk...

gravity–matter systems. Scale invariance has also been proposed to resolve the hierarchy problem of fundamental couplings. As a global continuous symmetry, scale invariance...

low energy supersymmetry, in which supersymmetry fully solves the hierarchy problem, this scale should not be far from 1000 GeV, and therefore should...

Maslow's hierarchy of needs is a conceptualisation of the needs (or goals) that motivate human behaviour, which was proposed by the American psychologist...

fundamental theories with fewer parameters. Some of the contrivances are: Hierarchy problem – the standard model introduces particle masses through a process...

Savas Dimopoulos, and Gia Dvali in 1998, in an attempt to solve the hierarchy problem. This theory requires that the fields of the Standard Model are confined...

physics the little hierarchy problem in the Minimal Supersymmetric Standard Model (MSSM) is a refinement of the hierarchy problem. According to quantum...

with extra dimensions are the two main proposals for resolving the hierarchy problem of the standard model, which is (roughly) the question of why gravity...

particular explanation, which remain mysterious, for instance the hierarchy problem. Theories beyond the Standard Model attempt to resolve these shortcomings...

problem in physics Why is the vacuum energy density much smaller than a zero-point energy suggested by quantum field theory? More unsolved problems in...

Higgs boson's existing problems. Two of the most currently researched models are quantum triviality, and Higgs hierarchy problem. In particle physics,...

graph isomorphism problem is in the low hierarchy of class NP, which implies that it is not NP-complete unless the polynomial time hierarchy collapses to its...

also arbitrary parameters. The Higgs mechanism gives rise to the hierarchy problem if some new physics (coupled to the Higgs) is present at high energy...

SU(8) GUT the simultaneous solution to the gauge hierarchy (doublet-triplet splitting) problem and problem of unification of flavor can be argued. GUTs with...

models of supersymmetry breaking, but if supersymmetry is to solve the hierarchy problem of the Standard Model, the gravitino cannot be more massive than about...

originally proposed in 1981 to stabilize the weak scale, solving the hierarchy problem. The Higgs boson mass of the Standard Model is unstable to quantum...

magnitude weaker than the other three fundamental forces? See also Hierarchy problem. Are there additional sources of quark flavour mixing beyond those...

studies the Standard Model, supersymmetry, possible solutions to the hierarchy problem concerning the relative weakness of gravity, cosmology of dimensions...

the cosmological constant problem (why is the cosmological constant so small?); the hierarchy problem; and the strong CP problem, among others. An example...

The Filesystem Hierarchy Standard (FHS) is a reference describing the conventions used for the layout of Unix-like systems. It has been made popular by...