Unity of All Elementary-Particle Forces

Georgi, Howard; Glashow, Sheldon L.

doi:10.1103/physrevlett.32.438

Cited by 4,513 publications

(4,147 citation statements)

References 17 publications

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“…We will consider both scenarios. There are two attractive gauge groups for unification in GEMs: SU (3) 3 [32] and SU (5) [33]. Larger groups would generally have too much matter, pushing the gauge couplings strong before the unification scale.…”

Section: Gem Grand Unificationmentioning

confidence: 99%

Dirac Gaugino Masses and Supersoft Supersymmetry Breaking

Fox¹,

Nelson²,

Weiner³

2002

J. High Energy Phys.

308

600

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We introduce a new supersymmetric extension of the standard model in which the gauge sector contains complete N = 2 supersymmetry multiplets. Supersymmetry breaking from the D-term vev of a hidden sector U (1) gauge field leads to Dirac soft supersymmetry breaking gaugino masses, and a new type of soft scalar trilinear couplings. The resulting squark and slepton masses are finite, calculable, positive and flavor universal. The Higgs soft mass squared is negative. The phenomenology of these theories differs significantly from the MSSM. We discuss a variety of possible origins for the soft operators and new fields, including models in both four and higher dimensions.

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Section: Gem Grand Unificationmentioning

confidence: 99%

Dirac Gaugino Masses and Supersoft Supersymmetry Breaking

Fox¹,

Nelson²,

Weiner³

2002

J. High Energy Phys.

308

600

View full text Add to dashboard Cite

show abstract

“…The specific relativistic QFT that turns out to describe nature extremely well, called the Standard Model [2,3,4], is subject to other symmetry principles which will be discussed in the following sections. The other idea that is central to the Standard Model is that of renormalization and will be discussed afterwards.…”

Section: The Standard Modelmentioning

confidence: 99%

“…The fields in the Lagrangian are written as products of the irreducible representations of these three groups (and of the external group). The SU(3) part corresponds with the strong interactions, and the U(1)×SU (2) corresponds to the electromagnetic and weak nuclear interactions.…”

Section: Gauge Symmetrymentioning

confidence: 99%

“…This will be discussed in section 2.3.2). The left-handed fermions (and right-handed anti-fermions) are combined in one representation, whereas the right-handed fermion fields are in separate representations 2 Graviton fields, which do not enter in the Standard Model but will be discussed later, are described by (spin-2) tensor fields 3 The irreducible representations are specified by N numbers, where N is the number of generators, which correspond to the charges of the field under the group. For instance, for every integer q there is a unitary irreducible representation α of U(1) ( -which has a single generator) on C given by αφ = e iqθ φ, φ C, θ R One can then define the self-adjoint operator Qφ = −i(dα)| θ=0 φ = qφ.…”

Section: Gauge Symmetrymentioning

confidence: 99%

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Search for Heavy Resonances in the Dimuon Channel with the DØ Detector

Berg

2009

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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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Unity of All Elementary-Particle Forces

Cited by 4,513 publications

References 17 publications

Dirac Gaugino Masses and Supersoft Supersymmetry Breaking

Dirac Gaugino Masses and Supersoft Supersymmetry Breaking

Search for Heavy Resonances in the Dimuon Channel with the DØ Detector

From 'not wrong' to (maybe right)

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