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75 research outcomes, page 1 of 8
  • publication . Article . Preprint . 2019
    Open Access English
    Authors:
    Ye-Ling Zhou; Lukas Heinrich; Jessica Turner; H. Schulz;
    Project: NSF | Elementary Particle Physi... (1505463), EC | InvisiblesPlus (690575), EC | ELUSIVES (674896), RCUK | Exploring the limits of t... (ST/L000296/1), NSF | Collaborative Research: S... (1450310)

    The observed pattern of mixing in the neutrino sector may be explained by the presence of a non-Abelian, discrete flavour symmetry broken into residual subgroups at low energies. Many flavour models require the presence of Standard Model singlet scalars which can prompt...

  • publication . Article . Preprint . 2017
    Open Access English
    Authors:
    Stephen F. King; Patrick Otto Ludl;
    Publisher: Springer/SISSA
    Project: EC | ELUSIVES (674896), EC | InvisiblesPlus (690575), RCUK | Exploring the limits of t... (ST/L000296/1)

    We propose supersymmetric Majoron inflation in which the Majoron field $\Phi$ responsible for generating right-handed neutrino masses may also be suitable for giving low scale "hilltop" inflation, with a discrete lepton number $Z_N$ spontaneously broken at the end of in...

  • publication . Article . Other literature type . Preprint . 2018
    Open Access
    Authors:
    Ye-Ling Zhou; Stephen F. King;
    Publisher: Springer
    Project: EC | ELUSIVES (674896), EC | InvisiblesPlus (690575), EC | NUMASS (617143), RCUK | Exploring the limits of t... (ST/L000296/1)

    We discuss the breaking of $SO(3)$ down to finite family symmetries such as $A_4$, $S_4$ and $A_5$ using supersymmetric potentials for the first time. We analyse in detail the case of supersymmetric $A_4$ and its finite subgroups $Z_3$ and $Z_2$. We then propose a super...

  • publication . Article . 2019
    Open Access English
    Authors:
    de Medeiros Varzielas, Ivo; Levy, Miguel; Zhou, Ye-Ling;
    Publisher: APS
    Project: EC | ELUSIVES (674896), EC | InvisiblesPlus (690575), RCUK | Exploring the limits of t... (ST/L000296/1)

    We explore the concept of effective alignments: contractions of multiple flavor symmetry breaking flavon fields. These contractions give rise to directions that are hard or impossible to obtain directly by breaking the flavor symmetry. Within this context, and using <ma...

  • publication . Article . Other literature type . Preprint . 2017
    Open Access English
    Authors:
    Stephen F. King;
    Publisher: Springer/SISSA
    Project: EC | InvisiblesPlus (690575), RCUK | Exploring the limits of t... (ST/L000296/1), EC | ELUSIVES (674896)

    We show how any flavour conserving $Z'$ model can be made flavour violating and non-universal by introducing mass mixing of quarks and leptons with a fourth family of vector-like fermions with non-universal $Z'$ couplings. After developing a general formalism, we focus ...

  • publication . Article . Other literature type . Preprint . 2018
    Open Access
    Authors:
    Stephen F. King; Fredrik Björkeroth; Eung Jin Chun;
    Publisher: Springer Science and Business Media LLC
    Project: EC | InvisiblesPlus (690575), EC | ELUSIVES (674896), RCUK | Exploring the limits of t... (ST/L000296/1)

    Comment: v1: 27 pages. v2: version to appear in JHEP. 31 pages. Extended discussion on axion basis, updated mixing bounds

  • publication . Preprint . Article . 2020
    Open Access English
    Authors:
    Nick W. Prouse; Susana Molina Sedgwick; Stephen J. Parke; Stephen F. King;
    Project: EC | InvisiblesPlus (690575), RCUK | Exploring the limits of t... (ST/L000296/1), EC | ELUSIVES (674896)

    This paper explores the effects of changes in matter density profiles on neutrino oscillation probabilities, and whether these could potentially be seen by the future Hyper-Kamiokande long-baseline oscillation experiment (T2HK). The analysis is extended to include the p...

  • publication . Article . Preprint . 2018
    Open Access English
    Authors:
    J. Peter Millington; P. S. Bhupal Dev; Björn Garbrecht; Stéphane Lavignac; Pasquale Di Bari; Daniele Teresi;
    Publisher: HAL CCSD
    Project: EC | InvisiblesPlus (690575), EC | ELUSIVES (674896), RCUK | Exploring the limits of t... (ST/L000296/1)

    Comment: 69 pages, 8 figures. Chapter 1 of the review volume "Leptogenesis: Current Challenges for Model Building, Phenomenology and Non-Equilibrium Field Theory". Matches published version

  • publication . Article . Preprint . 2017
    Open Access English
    Authors:
    Stephen F. King; Francisco J. de Anda; Elena Perdomo; Fredrik Björkeroth;
    Project: EC | ELUSIVES (674896), EC | InvisiblesPlus (690575), RCUK | Exploring the limits of t... (ST/L000296/1)

    Comment: 22 pages, 4 figures. Matches published version

  • publication . Article . Preprint . 2019
    Open Access English
    Authors:
    Ye-Ling Zhou; Maura Ramirez-Quezada; Shyam Balaji;
    Publisher: Springer
    Project: EC | ELUSIVES (674896), EC | InvisiblesPlus (690575), RCUK | Exploring the limits of t... (ST/L000296/1)

    The radiative decay of neutral fermions has been studied for decades but $CP$ violation induced within such a paradigm has evaded attention. $CP$ violation in these processes can produce an asymmetry between circularly polarised directions of the radiated photons and pr...

75 research outcomes, page 1 of 8