Hierarchy of Interactions in Unified Gauge Theories

Georgi, Howard; Quinn, Helen R.; Weinberg, Steven

doi:10.1103/physrevlett.33.451

Cited by 1,565 publications

(972 citation statements)

References 12 publications

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“…This motivation can also be extended to the grand unification scale [16,17] where the electromagnetic, weak and strong interactions are unified together [18] through the supersymmetric extensions of the SM.…”

Section: Unificationmentioning

confidence: 99%

“…There is no method to incorporate gravity which becomes important at energy scales approaching the Planck scale (M Planck = (8πG N ) −1/2 ∼ 2.4 × 10 18 GeV/c 2 ) and so the SM must be considered as an effective theory at energies below this scale. Some of the important drawbacks of the SM and their possible solutions are described bellow: At one loop each fermion contributes a correction of mass term, which is [14] ∆m 2 It is seen from equation 1.10 and 1.11 that if every fermion is accompanied by a scalars with coupling g S = 2g 2 f , the quadratic divergences cancel exactly.…”

Section: Drawback Of the Smmentioning

confidence: 99%

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Search for Di-Muon Decays of a Light Scalar Higgs Boson in Radiative Upsilon(1S) Decays

Prasad

2013

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Section: Unificationmentioning

confidence: 99%

Section: Drawback Of the Smmentioning

confidence: 99%

Search for Di-Muon Decays of a Light Scalar Higgs Boson in Radiative Upsilon(1S) Decays

Prasad

2013

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“…Symmetry Scalars contributing to RG evolution representation breaking The gauge coupling evolution is usually stated as [4]:…”

Section: So(10)mentioning

confidence: 99%

“…There are also several theoretical motivations for going beyond the SM, one of which is that the SM is a product of three gauge groups and so involves three independent couplings. A Grand Unified Theory (GUT), which is a theory of strong and electroweak interactions based on a single gauge group [3], aims to unify the three forces with a single coupling constant [4]. It also unifies the matter fields by placing the quarks and leptons in the same irreducible representation of the underlying gauge group [5].…”

Section: Introductionmentioning

confidence: 99%

An SO(10) model with adjoint fermions for double seesaw neutrino masses

2011

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An SO(10) model where the 10 H and 120 H representations are used for generating fermion masses is quite predictive, though due to the absence of SU (2) L,R triplet/singlet fields it cannot give rise to neutrino masses through the usual type-I or type-II seesaw mechanisms. In this paper for neutrino masses we propose an extension of such an SO(10) model by adding fermions in the adjoint representation (45 F ) and a symmetry breaking scalar 16 H . The 16 H couples the adjoint fermions to the standard fermions in 16 F and induces neutrino masses through the 'double seesaw' mechanism. In order to enhance the predictivity of the model we impose µ − τ flavour symmetry on the Yukawa matrices for 10 H and 16 H whereas for the 120 H it is assumed to be antisymmetric. We discuss the conditions that the mass matrices must obey so that the model can reproduce the tri-bimaximal mixing pattern.

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“…I couldn't help but compare our mess to some truly elegant ideas about unification, which involved more conventional kinds of gauge symmetry, not supersymmetry [2,3]. Those ideas were genuinely fruitful, in that they explained some things we already knew (the relative values of the strong, electromagnetic, and weak coupling constants) [4].…”

mentioning

confidence: 99%

From 'not wrong' to (maybe right)

Wilczek

2004

Nature

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This is a short, light spirited account of how some possibly important science actually happened. It very much conflicts with Popper's contention that the key to scientific progress is falsification.Savas Dimopoulos is always enthusiastic about something, and in the spring of 1981 it was supersymmetry. He was visiting the new Institute for Theoretical Physics in Santa Barbara, which I had recently joined. We hit it off immediately -he was bursting with wild ideas, and I liked to stretch my mind by trying to take them seriously.Supersymmetry was (and is) a beautiful mathematical idea. It extends the symmetry of special relativity. Special relativity postulates the invariance of physical law under motion with a constant velocity. It thereby allows us to transform between objects with different speeds and to predict the properties of moving particles from those of stationary ones. Supersymmetry postulates the invariance of physical law under certain kinds of motion in a quantum-mechanical extension of space-time, superspace. Superspace has four extra quantum-mechanical dimensions, quite different from the familiar four dimensions of space and time. When a particle "moves" in the extra quantum dimensions it just acquires a tiny amount of angular momentum, or spin. So you wouldn't want to live in the new suburbs of superspace: it's very cramped, and makes you dizzy. But the mathematics of supersymmetry promised (and still promises) to help us unify fundamental physics: it allows us to transform between objects of different spin. Several different kinds of particles, differing in their spin, could be manifestations of a single entity moving at different speeds through superspace.The problem with applying supersymmetry is that it's too good for this world. We simply don't find particles of the sort it predicts. We don't, for example, see particles with the same charge and mass as electrons, but a different amount of spin. * This is, in essence, a solicited "Turning Points" feature written for Nature. It appeared, in a slightly abbreviated form, in the March 18 issue.

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Hierarchy of Interactions in Unified Gauge Theories

Cited by 1,565 publications

References 12 publications

Search for Di-Muon Decays of a Light Scalar Higgs Boson in Radiative Upsilon(1S) Decays

Search for Di-Muon Decays of a Light Scalar Higgs Boson in Radiative Upsilon(1S) Decays

An SO(10) model with adjoint fermions for double seesaw neutrino masses

From 'not wrong' to (maybe right)

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