Dilepton gauge bosons: Present status and future prospects

Frampton, Paul H.; Ng, Daniel

doi:10.1103/physrevd.45.4240

Cited by 74 publications

(93 citation statements)

References 7 publications

(3 reference statements)

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“…Bileptons would contribute at tree level to the low-energy determination of sin 2 θ W , and very little to the LEP measurement, because LEP runs at the Z 0 peak. Bounds on bileptons from ν e e → ν e e have also been calculated [27]; these are similar to this, but constrain a different combination of generation indices, and will be discussed in Section 3.3.4.…”

Section: The Weak Mixing Anglementioning

confidence: 74%

“…Constraints on bileptons from Bhabha scattering (e + e − → e + e − ) have been calculated in Refs [25,27,32,66]. However, bounds on four fermion operators of the form (ēΓe)(f Γf ) (f here is an e, µ or τ ) have been calculated by the JADE and TASSO collaborations from PETRA data [67,68], and it is these stronger constraints that we quote.…”

Section: Compositeness Searchesmentioning

confidence: 99%

“…The muon decay µ − → e −ν µ ν e has been considered in Refs [27,28,29,35,36]. This lepton flavour violating process is forbidden in the standard model, but can be mediated at tree level by the singly-charged bileptons L − 2µ , L − 3 and L − 1 as depicted in Fig.…”

Section: The Decaymentioning

confidence: 99%

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Bileptons: present limits and future prospects

1998

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We define bileptons to be bosons coupling to a pair of leptons and construct the most general dimension four lagrangian involving scalar and vector bileptons. We concentrate on fields with lepton number 2, and derive model independent bounds on their masses and couplings from low-energy data. In addition, we study their signals in high energy experiments and forecast the discovery potential of future colliders.

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Section: The Weak Mixing Anglementioning

confidence: 74%

Section: Compositeness Searchesmentioning

confidence: 99%

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Bileptons: present limits and future prospects

1998

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“…Another example emerges in grand-unified models which contain dileptons among the heavy gauge bosons. These states give rise to electronnumber violating transitions of the kind e − e − → µ − µ − [7]. The latter process can also be mediated in left-right symmetric models by doubly charged Higgs boson exchange and higher order contributions from box diagrams involving Majorana neutrinos and the charged gauge bosons W − L,R [8].…”

Section: New Physics Reactionsmentioning

confidence: 99%

“…Fortunately, a study of the differential distributions for reactions (7)(8)(9) shows that this background can be eliminated by imposing relatively simple kinematical cuts. We illustrate this assertion for the process e − L e − R → W − Z 0 e − ν e in Fig.…”

Section: Standard Model Processesmentioning

confidence: 99%

Search for new physics in e−e− scattering

Cuypers¹,

Kołodziej²,

Rückl³

1994

Nuclear Physics B - Proceedings Supplements

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Conformality, Particle Phenomenology and the Cosmological Constant

Frampton

Quantum Gravity, Generalized Theory of Gravitation, and Superstring Theory-Based Unification

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Conformality is the idea that at TeV scales enrichment of the standard model particle spectrum leads to conformal invariance at a fixed point of the renormalization group. Some aspects of conformality in particle phenomenology and cosmology are discussed. Alternative to "Grand" UnificationIn GUT theories there is an unexplained hierarchy between the GUT scale and the weak scale which is about 14 orders of magnitude. There is the question of why these very different scales exist and how are the scales stabilized under quantum corrections? Supersymmetry solves the second of these problems but not the first. Supersymmetry has some successes: (i) the cancellation of some UV divergences; (ii) the technical naturalness of the hierarchy; (iii) the unification of the gauge couplings; and (iv) its natural appearance in string theory.On the other side, supersymmetry definitely presents several puzzles: (i) the "mu" problem -why is the Higgs at the weak scale not at the GUT scale?; (ii) breaking supersymmetry leads to too large a cosmological constant; and (iii) is supersymmetry really fundamental for string theory since there are solutions of string theory without supersymmetry.These general considerations led naturally to the suggestion [1,2,3,4,5,6] that supersymmetry and grand unification should be replaced by conformality at the TeV scale. Here it will be shown that this idea is possible, including explicit examples containing the standard model states. Further it will be shown that conformality is a much more rigid constraint than supersymmetry. Conformality predicts additional states at the TeV scale and a rich inter-family structure of Yukawa couplings.

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Dilepton gauge bosons: Present status and future prospects

Cited by 74 publications

References 7 publications

Bileptons: present limits and future prospects

Bileptons: present limits and future prospects

Search for new physics in e−e− scattering

Conformality, Particle Phenomenology and the Cosmological Constant

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