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10 research outcomes, page 1 of 1
  • publication . Article . Preprint . 2018
    Open Access English
    Authors:
    Ivo de Medeiros Varzielas; Stephen F. King;
    Project: FCT | UID/FIS/00777/2013 (147214), RCUK | Exploring the limits of t... (ST/L000296/1), EC | ELUSIVES (674896), EC | InvisiblesPlus (690575)

    We construct a model where the Yukawa couplings of the Standard Model (SM) fermions arise from the breaking of a $Z_2$ symmetry and through mixing with a fourth family of vector-like fermions. By adding a scalar leptoquark, which is an electroweak triplet and odd under ...

  • publication . Article . Preprint . Other literature type . 2018
    Open Access English
    Authors:
    Biswajit Karmakar; Biswajit Karmakar; Stephen F. King; Ivo de Medeiros Varzielas; Ivo de Medeiros Varzielas; Arunansu Sil; Subhaditya Bhattacharya;
    Publisher: SpringerOpen
    Project: RCUK | Exploring the limits of t... (ST/L000296/1), FCT | UID/FIS/00777/2013 (147214), EC | InvisiblesPlus (690575), EC | ELUSIVES (674896)

    In an attempt to unfold (if any) a possible connection between two apparently uncorrelated sectors, namely neutrino and dark matter, we consider the type-I seesaw and a fermion singlet dark matter to start with. Our construction suggests that there exists a scalar field...

  • publication . Article . Preprint . 2016
    Open Access English
    Authors:
    Chakrit Pongkitivanichkul; Miguel Crispim Romão; Bobby Samir Acharya; Bobby Samir Acharya; Krzysztof Bożek; Stephen F. King;
    Project: RCUK | Symmetry, supersymmetry, ... (ST/J002798/1), RCUK | Exploring the limits of t... (ST/L000296/1), FCT | SFRH/BD/84234/2012 (SFRH/BD/84234/2012), EC | ELUSIVES (674896), EC | InvisiblesPlus (690575)

    Comment: 32 pages, 12 figures

  • publication . Preprint . Other literature type . Article . 2016
    Open Access English
    Authors:
    Bari, Pasquale Di; Ludl, Patrick Otto; Palomares-Ruiz, Sergio;
    Project: FCT | PEst-OE/FIS/UI0777/2013 (132985), EC | ELUSIVES (674896), RCUK | Exploring the limits of t... (ST/L000296/1), EC | InvisiblesPlus (690575)

    We revisit a model in which neutrino masses and mixing are described by a two right-handed (RH) neutrino seesaw scenario, implying a strictly hierarchical light neutrino spectrum. A third decoupled RH neutrino, $N_{\rm DM}$ with mass $M_{\rm DM}$, plays the role of cold...

  • publication . Article . Preprint . 2019
    Open Access
    Authors:
    Stephen F. King; Ivo de Medeiros Varzielas;
    Publisher: American Physical Society (APS)
    Project: RCUK | Exploring the limits of t... (ST/L000296/1), FCT | UID/FIS/00777/2013 (147214), EC | InvisiblesPlus (690575), EC | ELUSIVES (674896)

    We propose a model in which the Yukawa couplings of Higgs doublets are related to the couplings of the chiral fermions to a scalar leptoquark triplet. This is due to their common origin via mixing with a vector-like family distinguished by a discrete $Z_5$ symmetry, und...

  • publication . Preprint . 2019
    Open Access English
    Authors:
    Varzielas, Ivo de Medeiros; Levy, Miguel; Zhou, Ye-Ling;
    Project: RCUK | Exploring the limits of t... (ST/L000296/1), FCT | UID/FIS/00777/2013 (147214), EC | ELUSIVES (674896), EC | InvisiblesPlus (690575)

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

  • publication . Article . Preprint . 2016
    Open Access English
    Authors:
    Steve F. King; José Eliel Camargo-Molina; David J. Miller; Alexander Belyaev; Alexander Belyaev; António P. Morais; António P. Morais; Patrick B. Schaefers;
    Publisher: Springer Nature
    Project: RCUK | Exploring the limits of t... (ST/L000296/1), EC | ELUSIVES (674896), EC | InvisiblesPlus (690575), FCT | UID/MAT/04106/2013 (147206), EC | StronGrHEP (690904), FCT | SFRH/BPD/97126/2013 (SFRH/BPD/97126/2013)

    Comment: 29 pages, 14 figures; [v2] added references, corrected minor typos

  • publication . Article . Preprint . 2017
    Open Access English
    Authors:
    Stephen F. King; Miguel Crispim Romão;
    Publisher: SpringerOpen
    Project: RCUK | Exploring the limits of t... (ST/L000296/1), FCT | SFRH/BD/84234/2012 (SFRH/BD/84234/2012), EC | ELUSIVES (674896), EC | InvisiblesPlus (690575)

    We propose a simple modification of the no-scale supergravity Wess-Zumino model of Starobinsky-like inflation to include a Polonyi term in the superpotential. The purpose of this term is to provide an explicit mechanism for supersymmetry breaking at the end of inflation...

  • publication . Article . Preprint . 2016
    Open Access English
    Authors:
    George K. Leontaris; Miguel Crispim Romão; Andrew K. Meadowcroft; Stephen F. King; Athanasios Karozas;
    Project: RCUK | Exploring the limits of t... (ST/L000296/1), FCT | SFRH/BD/84234/2012 (SFRH/BD/84234/2012), EC | ELUSIVES (674896), EC | InvisiblesPlus (690575)

    Comment: 40 pages, 13 figures, minor corrections

  • publication . Article . Preprint . Other literature type . 2017
    Open Access English
    Authors:
    Christoph Luhn; Stephen F. King; Ivo de Medeiros Varzielas; Thomas Neder;
    Publisher: Springer
    Project: RCUK | Exploring the limits of t... (ST/L000296/1), EC | SIFT (327195), FCT | UID/FIS/00777/2013 (147214), EC | ELUSIVES (674896), EC | InvisiblesPlus (690575)

    Motivated by discrete flavour symmetry models, we analyse Spontaneous CP Violation (SCPV) for potentials involving three or six Higgs fields (both electroweak doublets and singlets) which fall into irreducible triplet representations of discrete symmetries belonging to ...

10 research outcomes, page 1 of 1