A theory of flavor mixing

Rújula, A. De; Glashow, Sheldon L.

doi:10.1016/0003-4916(77)90172-5

Cited by 127 publications

(27 citation statements)

References 57 publications

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“…Purely leptonic decays of pseudoscalar mesons (PS) are strongly suppressed by helicity selection rules. This is particularly true for the electron mode, which is smaller by a factor (m e /m il ) 2^ 2.3x 10" 5 3 ' 4 indicate that mass differences between corresponding V and PS mesons are very small, of the order of 100 MeV. This is a small fraction of the scale of SU(4) breaking, so that first-order mass formulas cannot be relied upon to predict the order of levels.…”

mentioning

confidence: 99%

Possibility that Charmed Vector Mesons are Lighter than Charmed Pseudoscalars

1975

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confidence: 99%

Possibility that Charmed Vector Mesons are Lighter than Charmed Pseudoscalars

1975

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“…Including the new term, the charged weak hadronic current in terms of quarks is 1 J» = w>> (1 +y 5 )(dC + sS) + cy p (l +y 5 …”

mentioning

confidence: 99%

“…The dramatic change from the behavior below the charm threshold is the y distribution for vN, which is now no longer flat. 5 For the purposes of illustration, we use a QPM valence-sea parametrization of preliminary vN and vN FNAL 6 x distributions below 30 GeV. The x and y distributions for this model, below and above threshold, are shown in Fig.…”

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confidence: 99%

New Charm-Current Effects in Neutrino Scattering

1975

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“…As alternative to SU (3) 12 another approach to TeV unification has as its group at ∼ 4 TeV SU (6) 3 where one SU (6) breaks diagonally to color while the other two SU (6)'s each break to SU (3) k=5 where level k = 5 characterizes irregular embedding 25 . The triangular quiver −C − W − H− with ends identified and A µ = (α, α, α, 1), α = exp(2πi/3), preserves N = 1 supersymmetry.…”

Section: Tev Grand Unificationmentioning

confidence: 99%

Quiver Gauge Theory and Unification at About 4 Tev

Frampton

2003

Strong Coupling Gauge Theories and Effective Field Theories

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The use of the AdS/CFT correspondence to arrive at quiver gauge field theories is dicussed, focusing on the orbifolded case without supersymmetry. An abelian orbifold with the finite group Zp can give rise to a G = SU (N ) p gauge group with chiral fermions and complex scalars in different bi-fundamental representations of G. The precision measurements at the Z resonance suggest the values p = 12 and N = 3, and a unifications scale M U ∼ 4 TeV.The robustness and predictivity of such grand unification is discussed. Quiver Gauge TheoryThe relationship of the Type IIB superstring to conformal gauge theory in d = 4 gives rise to an interesting class of gauge theories. Choosing the simplest compactification 1 on AdS 5 × S 5 gives rise to an N = 4 SU(N) gauge theory which is known to be conformal due to the extended global supersymmetry and non-renormalization theorems. All of the RGE β−functions for this N = 4 case are vanishing in perturbation theory. It is possible to break the N = 4 to N = 2, 1, 0 by replacing S 5 by an orbifold S 5 /Γ where Γ is a discrete group with Γ ⊂ SU (2), ⊂ SU (3), ⊂ SU (3) respectively.In building a conformal gauge theory model 2,3,4 , the steps are: (1) Choose the discrete group Γ; (2) Embed Γ ⊂ SU (4); (3) Choose the N of SU (N ); and (4) Embed the Standard Model SU (3) × SU (2) × U (1) in the resultant gauge group SU (N ) p (quiver node identification). Here we shall look only at abelian Γ = Z p and define α = exp(2πi/p). It is expected from the string-field duality that the resultant field theory is conformal in the N −→ ∞ limit, and will have a fixed manifold, or at least a fixed point, for N finite.Before focusing on N = 0 non-supersymmetric cases, let us first examine an N = 1 model first put forward in the work of Kachru and Silverstein 5 .

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A theory of flavor mixing

Cited by 127 publications

References 57 publications

Possibility that Charmed Vector Mesons are Lighter than Charmed Pseudoscalars

Possibility that Charmed Vector Mesons are Lighter than Charmed Pseudoscalars

New Charm-Current Effects in Neutrino Scattering

Quiver Gauge Theory and Unification at About 4 Tev

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