Flavour in supersymmetric Grand Unification: A democratic approach

Riccardo Barbieri, Gia Dvali, Alessandro Strumia, Zurab Berezhiani, Lawrence Hall

    Research output: Contribution to journalArticle

    Abstract

    We consider the flavour problem in a supersymmetric Grand Unified theory with gauged SU(6) group, where the Higgs doublets are understood as pseudo-Goldstone bosons of a larger SU(6) ⊗ SU(6) global symmetry of the Higgs superpotential. A key element of this work is that we never appeal to any flavour symmetry. One main interesting feature emerges: only one of the light fermions, an up-type quark, to be identified with the top, can get a Yukawa coupling at renormalizable level. This fact, together with bottom-tau Yukawa unification, also implied in our scheme, gives rise to a characteristic correlation between the top and the Higgs mass. By including a flavour-blind discrete symmetry and requiring that all higher dimensional operators be mediated by the exchanges of appropriate heavy multiplets, it is possible to give an approximate description of all masses and mixing angles in term of a hierarchy of Grand Unified scales. A special "texture" arises, implying a relation between the top mass and the third generation mixing angles. Several other possible consequences of this approach are pointed out, concerning the μ/s mass ratio, the Cabibbo angle and the proton decay.

    Original languageEnglish (US)
    Pages (from-to)49-67
    Number of pages19
    JournalNuclear Physics, Section B
    Volume432
    Issue number1-2
    DOIs
    StatePublished - Dec 19 1994

    Fingerprint

    symmetry
    grand unified theory
    mass ratios
    hierarchies
    bosons
    textures
    fermions
    fine structure
    quarks
    operators
    protons
    decay

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

    Cite this

    Barbieri, R., Dvali, G., Strumia, A., Berezhiani, Z., & Hall, L. (1994). Flavour in supersymmetric Grand Unification: A democratic approach. Nuclear Physics, Section B, 432(1-2), 49-67. https://doi.org/10.1016/0550-3213(94)90593-2

    Flavour in supersymmetric Grand Unification : A democratic approach. / Barbieri, Riccardo; Dvali, Gia; Strumia, Alessandro; Berezhiani, Zurab; Hall, Lawrence.

    In: Nuclear Physics, Section B, Vol. 432, No. 1-2, 19.12.1994, p. 49-67.

    Research output: Contribution to journalArticle

    Barbieri, R, Dvali, G, Strumia, A, Berezhiani, Z & Hall, L 1994, 'Flavour in supersymmetric Grand Unification: A democratic approach', Nuclear Physics, Section B, vol. 432, no. 1-2, pp. 49-67. https://doi.org/10.1016/0550-3213(94)90593-2
    Barbieri, Riccardo ; Dvali, Gia ; Strumia, Alessandro ; Berezhiani, Zurab ; Hall, Lawrence. / Flavour in supersymmetric Grand Unification : A democratic approach. In: Nuclear Physics, Section B. 1994 ; Vol. 432, No. 1-2. pp. 49-67.
    @article{2379f0304fbc444aba4afb2134c9ca6f,
    title = "Flavour in supersymmetric Grand Unification: A democratic approach",
    abstract = "We consider the flavour problem in a supersymmetric Grand Unified theory with gauged SU(6) group, where the Higgs doublets are understood as pseudo-Goldstone bosons of a larger SU(6) ⊗ SU(6) global symmetry of the Higgs superpotential. A key element of this work is that we never appeal to any flavour symmetry. One main interesting feature emerges: only one of the light fermions, an up-type quark, to be identified with the top, can get a Yukawa coupling at renormalizable level. This fact, together with bottom-tau Yukawa unification, also implied in our scheme, gives rise to a characteristic correlation between the top and the Higgs mass. By including a flavour-blind discrete symmetry and requiring that all higher dimensional operators be mediated by the exchanges of appropriate heavy multiplets, it is possible to give an approximate description of all masses and mixing angles in term of a hierarchy of Grand Unified scales. A special {"}texture{"} arises, implying a relation between the top mass and the third generation mixing angles. Several other possible consequences of this approach are pointed out, concerning the μ/s mass ratio, the Cabibbo angle and the proton decay.",
    author = "Riccardo Barbieri and Gia Dvali and Alessandro Strumia and Zurab Berezhiani and Lawrence Hall",
    year = "1994",
    month = "12",
    day = "19",
    doi = "10.1016/0550-3213(94)90593-2",
    language = "English (US)",
    volume = "432",
    pages = "49--67",
    journal = "Nuclear Physics B",
    issn = "0550-3213",
    publisher = "Elsevier",
    number = "1-2",

    }

    TY - JOUR

    T1 - Flavour in supersymmetric Grand Unification

    T2 - A democratic approach

    AU - Barbieri, Riccardo

    AU - Dvali, Gia

    AU - Strumia, Alessandro

    AU - Berezhiani, Zurab

    AU - Hall, Lawrence

    PY - 1994/12/19

    Y1 - 1994/12/19

    N2 - We consider the flavour problem in a supersymmetric Grand Unified theory with gauged SU(6) group, where the Higgs doublets are understood as pseudo-Goldstone bosons of a larger SU(6) ⊗ SU(6) global symmetry of the Higgs superpotential. A key element of this work is that we never appeal to any flavour symmetry. One main interesting feature emerges: only one of the light fermions, an up-type quark, to be identified with the top, can get a Yukawa coupling at renormalizable level. This fact, together with bottom-tau Yukawa unification, also implied in our scheme, gives rise to a characteristic correlation between the top and the Higgs mass. By including a flavour-blind discrete symmetry and requiring that all higher dimensional operators be mediated by the exchanges of appropriate heavy multiplets, it is possible to give an approximate description of all masses and mixing angles in term of a hierarchy of Grand Unified scales. A special "texture" arises, implying a relation between the top mass and the third generation mixing angles. Several other possible consequences of this approach are pointed out, concerning the μ/s mass ratio, the Cabibbo angle and the proton decay.

    AB - We consider the flavour problem in a supersymmetric Grand Unified theory with gauged SU(6) group, where the Higgs doublets are understood as pseudo-Goldstone bosons of a larger SU(6) ⊗ SU(6) global symmetry of the Higgs superpotential. A key element of this work is that we never appeal to any flavour symmetry. One main interesting feature emerges: only one of the light fermions, an up-type quark, to be identified with the top, can get a Yukawa coupling at renormalizable level. This fact, together with bottom-tau Yukawa unification, also implied in our scheme, gives rise to a characteristic correlation between the top and the Higgs mass. By including a flavour-blind discrete symmetry and requiring that all higher dimensional operators be mediated by the exchanges of appropriate heavy multiplets, it is possible to give an approximate description of all masses and mixing angles in term of a hierarchy of Grand Unified scales. A special "texture" arises, implying a relation between the top mass and the third generation mixing angles. Several other possible consequences of this approach are pointed out, concerning the μ/s mass ratio, the Cabibbo angle and the proton decay.

    UR - http://www.scopus.com/inward/record.url?scp=0002450280&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=0002450280&partnerID=8YFLogxK

    U2 - 10.1016/0550-3213(94)90593-2

    DO - 10.1016/0550-3213(94)90593-2

    M3 - Article

    VL - 432

    SP - 49

    EP - 67

    JO - Nuclear Physics B

    JF - Nuclear Physics B

    SN - 0550-3213

    IS - 1-2

    ER -