SCOAP3 Repository 15 records found  1 - 10nextSearch took 0.01 seconds. 
1. Accidental Peccei–Quinn symmetry from discrete flavour symmetry and Pati–Salam / Björkeroth, Fredrik ; Chun, Eung Jin ; King, Stephen F.
We show how an accidental U(1) Peccei–Quinn (PQ) symmetry can arise from a discrete A4 family symmetry combined with a discrete flavour symmetry Z3×Z52 , in a realistic Pati–Salam unified theory of flavour. [...]
Published in Physics letters B (2017) 10.1016/j.physletb.2017.12.058
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2. Minima of multi-Higgs potentials with triplets of Δ(3 n 2 ) and Δ(6 n 2 ) / de Medeiros Varzielas, Ivo ; King, Stephen F. ; Luhn, Christoph ; Neder, Thomas
We analyse the minima of scalar potentials for multi-Higgs models where the scalars are arranged as either one triplet or two triplets of the discrete symmetries A4 , S4 , Δ(27) , Δ(54) , as well as Δ(3n2) and Δ(6n2) with n>3 . [...]
Published in Physics letters B (2017) 10.1016/j.physletb.2017.11.005
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3. Golden Littlest Seesaw / Ding, Gui-Jun ; King, Stephen F. ; Li, Cai-Chang
We propose and analyse a new class of Littlest Seesaw models, with two right-handed neutrinos in their diagonal mass basis, based on preserving the first column of the Golden Ratio mixing matrix. [...]
Published in Nuclear Physics B (2017) 10.1016/j.nuclphysb.2017.10.019
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4. Leptogenesis after chaotic sneutrino inflation and the supersymmetry breaking scale / Björkeroth, Fredrik ; King, Stephen F. ; Schmitz, Kai ; Yanagida, Tsutomu T.
We discuss resonant leptogenesis arising from the decays of two nearly-degenerate right-handed neutrinos, identified as the inflaton and stabiliser superfields in a model of chaotic sneutrino inflation. [...]
Published in Nuclear Physics B (2017) 10.1016/j.nuclphysb.2017.01.017
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5. 750 GeV diphoton excess from E 6 in F-theory GUTs / Karozas, Athanasios ; King, Stephen F. ; Leontaris, George K. ; Meadowcroft, Andrew K.
We interpret the 750–760 GeV diphoton resonance as one or more of the spinless components of a singlet superfield arising from the three 27-dimensional representations of E6 in F-theory, which also contain three copies of colour-triplet charge ∓1/3 vector-like fermions Di,D¯i and inert Higgs doublets to which the singlets may couple. [...]
Published in Physics letters B (2016) 10.1016/j.physletb.2016.03.054
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6. Neutrino mass and mixing in the seesaw playground / King, Stephen F.
We discuss neutrino mass and mixing in the framework of the classic seesaw mechanism, involving right-handed neutrinos with large Majorana masses, which provides an appealing way to understand the smallness of neutrino masses. [...]
Published in Nuclear Physics B (2015) 10.1016/j.nuclphysb.2015.12.015
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7. Successful N2 leptogenesis with flavour coupling effects in realistic unified models / Bari, Pasquale Di ; King, Stephen F.
In realistic unified models involving so-called SO(10)-inspired patterns of Dirac and heavy right-handed (RH) neutrino masses, the lightest right-handed neutrino N1 is too light to yield successful thermal leptogenesis, barring highly fine tuned solutions, while the second heaviest right-handed neutrino N2 is typically in the correct mass range [...]
Published in JCAP 1510 (2015) 008 10.1088/1475-7516/2015/10/008 arXiv:1507.06431
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8. Invariant approach to CP in unbroken Δ(27) / Branco, Gustavo C. ; de Medeiros Varzielas, Ivo ; King, Stephen F.
The invariant approach is a powerful method for studying CP violation for specific Lagrangians. [...]
Published in Nuclear Physics B (2015) 10.1016/j.nuclphysb.2015.07.024
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9. Quark mixing from Δ(6 N 2 ) family symmetry / Ishimori, Hajime ; King, Stephen F. ; Okada, Hiroshi ; Tanimoto, Morimitsu
We consider a direct approach to quark mixing based on the discrete family symmetry Δ(6N2) in which the Cabibbo angle is determined by a residual Z2×Z2 subgroup to be |Vus|=0.222521 , for N being a multiple of 7. [...]
Published in Physics letters B (2015) 10.1016/j.physletb.2015.02.027
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10. A to Z of Flavour with Pati-Salam / Stephen F. King
We propose an elegant theory of flavour based on A 4 × Z 5 family symmetry with Pati-Salam unification which provides an excellent description of quark and lepton masses, mixing and CP violation. [...]
Published in JHEP 1408 (2014) 130 10.1007/JHEP08(2014)130 arXiv:1406.7005
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