Phenomenology of a Supersymmetric Model for Fermion Mass Hierarchy

Some phenomenological aspects of a supersymmetric model for fermion mass hierarchy proposed previously are discussed. It is required that the lepton universality violation is near to its current experimental bound. The lepton number violation decay modes τ→2eμ and 3μ maybe observable in the near future. The Majorana mass of electron-neutrino is predicted to be about 0.1 eV. The fine-tuning problem is discussed.

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A bottom-up approach to fermion mass hierarchy: a case with vector-like fermions

Progress of Theoretical and Experimental Physics ◽

10.1093/ptep/ptaa046 ◽

2020 ◽

Vol 2020 (4) ◽

Cited By ~ 1

Author(s):

Yoshiharu Kawamura

Keyword(s):

Standard Model ◽

Yukawa Coupling ◽

High Energy ◽

Fine Tuning ◽

Fermion Mass ◽

Extended Model ◽

Mass Hierarchy ◽

Bottom Up ◽

Existence Proofs ◽

The Standard Model

Abstract We propose a bottom-up approach in which a structure of high-energy physics is explored by accumulating existence proofs and/or no-go theorems in the standard model or its extension. As an illustration, we study fermion mass hierarchies based on an extension of the standard model with vector-like fermions. It is shown that the magnitude of elements of Yukawa coupling matrices can become $O(1)$ and a Yukawa coupling unification can be realized in a theory beyond the extended model, if vector-like fermions mix with three families. In this case, small Yukawa couplings in the standard model can be highly sensitive to a small variation of matrix elements, and it seems that the mass hierarchy occurs as a result of fine tuning.

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Cosmology in multiply warped braneworld scenario

International Journal of Modern Physics A ◽

10.1142/s0217751x14500699 ◽

2014 ◽

Vol 29 (13) ◽

pp. 1450069 ◽

Cited By ~ 1

Author(s):

Narayan Banerjee ◽

Sayantani Lahiri ◽

Soumitra SenGupta

Keyword(s):

Cosmological Constant ◽

Extra Dimensions ◽

Fine Tuning ◽

Fermion Mass ◽

Mass Hierarchy ◽

Hubble Expansion ◽

Cosmological Scenario ◽

Higher Dimensional ◽

Gauge Hierarchy ◽

Bulk Cosmological Constant

Hubble expansion in warped braneworld model is addressed in the presence of more than one warped extra dimensions. Some distinct phenomenological signatures of such model has already been discussed in the context of collider-based experiments as well as to explain the fermion mass hierarchy in the Standard Model of elementary particles. In this paper, we explore some cosmological implications of such a model. It is shown that while the expansion depends on all the moduli, an exponential nature of the expansion of the scale factor emerges as a generic feature which is independent of the number of extra dimensions but depends only on the bulk cosmological constant and brane pressure. A generalized expression for the effective 3-brane cosmological constant in such model has been derived. This generalizes the well-known fine tuning/detuning between the bulk cosmological constant and brane tension to obtain the desired cosmological constant on the brane. The warped factor corresponding to the higher-dimensional cosmological scenario is determined and the issue of gauge hierarchy problem is discussed.

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Supersymmetric model for fermion mass hierarchy

Physics Letters B ◽

10.1016/0370-2693(90)91433-c ◽

1990 ◽

Vol 237 (2) ◽

pp. 221-228 ◽

Cited By ~ 14

Author(s):

K.S. Babu ◽

B.S. Balakrishna ◽

R.N. Mohapatra

Keyword(s):

Fermion Mass ◽

Supersymmetric Model ◽

Mass Hierarchy

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Neutrino masses along with fermion mass hierarchy

Physical Review D ◽

10.1103/physrevd.85.013005 ◽

2012 ◽

Vol 85 (1) ◽

Cited By ~ 2

Author(s):

Dilip Kumar Ghosh ◽

R. S. Hundi

Keyword(s):

Fermion Mass ◽

Neutrino Masses ◽

Mass Hierarchy

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A SOLUTION TO THE STRONG CP PROBLEM TRANSFORMING THE THETA ANGLE TO THE KM CP-VIOLATING PHASE

International Journal of Modern Physics A ◽

10.1142/s0217751x10051165 ◽

2010 ◽

Vol 25 (32) ◽

pp. 5897-5911 ◽

Cited By ~ 9

Author(s):

JOSÉ BORDES ◽

HONG-MO CHAN ◽

SHEUNG TSUN TSOU

Keyword(s):

Mass Matrix ◽

Fermion Mass ◽

Mass Hierarchy ◽

Order Unity ◽

Ckm Matrix ◽

Cp Violations ◽

Fermion Mass Matrix

It is shown that in the scheme with a rotating fermion mass matrix (i.e. one with a scale-dependent orientation in generation space) suggested earlier for explaining fermion mixing and mass hierarchy, the theta angle term in the QCD action of topological origin can be eliminated by chiral transformations, while giving still nonzero masses to all quarks. Instead, the effects of such transformations get transmitted by the rotation to the CKM matrix as the KM phase giving, for θ of order unity, a Jarlskog invariant typically of order 10-5, as experimentally observed. Strong and weak CP violations appear then as just two facets of the same phenomenon.

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The role of 75H in fermion mass hierarchy

Physics Letters B ◽

10.1016/0370-2693(84)91377-7 ◽

1984 ◽

Vol 134 (6) ◽

pp. 425-428 ◽

Cited By ~ 5

Author(s):

Jihn E. Kim ◽

Murat Özer

Keyword(s):

Fermion Mass ◽

Mass Hierarchy

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Fermion mass hierarchy and nonhierarchical mass ratios inSU(5)×U(1)F

Physical Review D ◽

10.1103/physrevd.78.035003 ◽

2008 ◽

Vol 78 (3) ◽

Cited By ~ 6

Author(s):

Luis F. Duque ◽

Diego A. Gutierrez ◽

Enrico Nardi ◽

Jorge Noreña

Keyword(s):

Fermion Mass ◽

Mass Hierarchy ◽

Mass Ratios

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THE DUALIZED STANDARD MODEL AND ITS APPLICATIONS — AN INTERIM REPORT

International Journal of Modern Physics A ◽

10.1142/s0217751x9900110x ◽

1999 ◽

Vol 14 (14) ◽

pp. 2173-2203 ◽

Cited By ~ 9

Author(s):

HONG-MO CHAN ◽

SHEUNG TSUN TSOU

Keyword(s):

Standard Model ◽

High Energy ◽

Fermion Mass ◽

Mass Hierarchy ◽

Matrix Elements ◽

Ckm Matrix ◽

High Energy Cosmic Rays ◽

Perturbative Method ◽

Ckm Matrix Elements ◽

Physical Consequences

Based on a non-Abelian generalization of electric–magnetic duality, the Dualized Standard Model (DSM) suggests a natural explanation for exactly three generations of fermions as the "dual colour" [Formula: see text] symmetry broken in a particular manner. The resulting scheme then offers on the one hand a fermion mass hierarchy and a perturbative method for calculating the mass and mixing parameters of the Standard Model fermions, and on the other hand testable predictions for new phenomena ranging from rare meson decays to ultra-high energy cosmic rays. Calculations to one-loop order gives, at the cost of adjusting only three real parameters, values for the following quantities all (except one) in very good agreement with experiment: the quark CKM matrix elements ‖Vrs‖, the lepton CKM matrix elements ‖Urs‖, and the second generation masses mc, ms, mμ. This means, in particular, that it gives near maximal mixing Uμ3 between νμ and ντ as observed by SuperKamiokande, Kamiokande and Soudan, while keeping small the corresponding quark angles Vcb, Vts. In addition, the scheme gives (i) rough order-of-magnitude estimates for the masses of the lowest generation, (ii) predictions for low energy FCNC effects such as KL→ eμ, and (iii) a possible explanation for the long-standing puzzle of air showers beyond the GZK cut-off. All these together, however, still represent but a portion of the possible physical consequences derivable from the DSM scheme, the majority of which are yet to be explored.

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