SO(10) grand unified theories with dynamical Yukawa couplings

Aulakh, Charanjit S.; Khosa, Charanjit K.

doi:10.1103/physrevd.90.045008

Cited by 9 publications

(29 citation statements)

References 31 publications

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“…In such NMSGUT based models, however, the Higgs and Yukawon functions can be comfortably combined, without sacrificing renormalizablity, and the flavour symmetry broken at the only scale where there is a hint of flavour unification : the GUT scale. In [20,21] we showed that this economical scenario is actually realizable in the context of models where a gauged O(N g ) flavour symmetry is appended to the NMSGUT without disturbing the structure of NMSGUT apart from the promotion of Higgs from bland to flavoured and the inverse demotion of SO (10) matter Yukawas from flavoured to to bland. We note that the freedom to gauge flavour achieved in these models is in line with the philosophy we have consistently abided by, first in MSLRMs [4] and then in MSGUTs [13,14,10,16,17] : invoke no ad hoc global symmetries whether continuous or discrete and shelter always under the sole reliable dynamical principle revealed by 20th century physics : local gauge invariance.…”

Section: Yukawon Flavour Modelsmentioning

confidence: 92%

“…The spontaneous symmetry breaking at the GUT scale due to the above superpotential is largely analogous to the MSGUT case although algebraic complications require numerical solution of the F term conditions [20]. The contribution of the MSGUT type Higgs fields to the flavour group D terms cannot vanish and this breaks supersymmetry unless additional chiral multiplets charged under flavour but not under SO(10) and free to cancel the MSGUT type Higgs contribution in the flavour D-Terms are introduced.…”

Section: Yukawon Flavour Modelsmentioning

confidence: 99%

“…Finally, given that a completely acceptable UV completion of the MSSM may be available in the NMSGUT, we asked whether the sublation of the MSSM data in the NMSGUT is not the optimal starting point to attack the problem of flavour. Dynamical generation of the successful MSGUT matter couplings by promotion of the flavour symmetry to a gauged O(N g ) symmetry broken by the MSSM GUTs (promoted to irreps of the flavour symmetry) and still under the crucial constraint that a single pair of Higgs doublets remain light in the effec-tive MSSM is feasible [20,21]. Surprisingly, the fermion hierarchies generated tend to carry the features we associate with the MSSM : small CKM and large PMNS mixings, hierarchical fermion Yukawas and so on.…”

Section: Introductionmentioning

confidence: 99%

“…In this proceeding we run through the main issues of our current work these two areas. Details may be found in [10,17,20,21].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

MSSM Higgs : Window into Susy GUTs

Aulakh¹

2016

Proceedings of 18th International Conference From the Planck Scale to the Electroweak Scale — PoS(PLANCK 2015)

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The Minimal Supersymmetric SO(10) GUT has developed into a fully realistic theory in which not only are the gauge couplings unified but the known fermion spectrum and mixing matrices could fit accurately using the latitude introduced by inclusion of quantum corrections to the GUT-effective MSSM-SM matching conditions. The fits yield predictions about the nature of the sparticle spectrum on the basis of the required threshold corrections. This indicated a necessarily large value for A 0 in 2008 : well before Higgs discovery at 126 GeV made it a commonplace assumption. GUT scale threshold corrections to the normalization of the emergent effective MSSM Higgs ameliorate the long standing Susy GUT puzzle of fast dimension five operator mediated proton decay. Numerical investigation indicates that B-violation rates below or near the current experimental upper limits are feasible in fully realistic models. Our results imply that UV completion models with large numbers of fields, like Kaluza-Klein models or String Theory, must be able to compute threshold corrections to be considered quantitative theories and not just fables. Required improvements in the fitting procedure are discussed. A generalization of the NMSGUT by gauging the flavour symmetry of the kinetic terms, while retaining renormalizability and the successful MSGUT symmetry breaking patterns, may allow dynamical generation of the observed Yukawa structure of the MSSM via the spontaneous breaking of the full gauge symmetry down to the MSSM at the unification scale. Focus on the emergence of the MSSM Higgs from the multiple Higgs doublets in the GUT thus provides a crucial window to view the energetically remote UV dynamics specified in fully calculable and realistic MSGUTs.

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Section: Yukawon Flavour Modelsmentioning

confidence: 92%

Section: Yukawon Flavour Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…In this proceeding we run through the main issues of our current work these two areas. Details may be found in [10,17,20,21].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

MSSM Higgs : Window into Susy GUTs

Aulakh¹

2016

Proceedings of 18th International Conference From the Planck Scale to the Electroweak Scale — PoS(PLANCK 2015)

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“…Continuous flavor symmetries have been previously discussed in, for instance, Refs. [16][17][18][19][20][21][22][23][24][25][26]. Under Flavorspin, quarks and leptons transform as triplets and Yukawa matrices are upgraded to composite spurions, formed by linear combinations of fundamental ones that transform as symmetric or antisymmetric real matrices under flavor SU (2).…”

Section: Introductionmentioning

confidence: 99%

Standard model flavor from an SU(2) symmetry

Berryman¹,

Hernández²

2017

Phys. Rev. D

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We propose that the flavor structure of the standard model is based on a horizontal SU (2) symmetry. It generically predicts (i) a parametrically small mass for the lightest charged fermions, (ii) small mixings in the quark sector, and (iii) suppression of flavor-changing neutral currents. Supplemented with the assumption of a strong hierarchy between the second-and third-generation masses, it also predicts (iv) a large CP -violating phase in the quark sector. Only Majorana neutrinos allow for large mixings in the lepton sector. In this case, this framework further predicts (v) near-maximal θ l 23 , (vi) a normal hierarchy of neutrino masses, and (vii) large CP violation in the lepton sector.

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New minimal SO(10) GUT: A theory for all epochs

Aulakh

2016

Pramana - J Phys

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The Supersymmetric SO (10) theory ("NMSO(10)GUT") based on the 210 + 126 + 126 Higgs system proposed in 1982 has evolved into a realistic theory capable of fitting the known low energy Particle Physics data besides providing a Dark matter candidate and embedding Inflationary Cosmology. It dynamically resolves longstanding issues such as fast dimension five operator mediated proton decay in Susy GUTs by allowing explicit and complete calculation of crucial threshold effects at M Susy and M GU T in terms of fundamental parameters. This shows that SO(10) Yukawas responsible for observed fermion masses as well as operator dimension 5 mediated proton decay can be highly suppressed on a "Higgs dissolution edge" in the parameter space of GUTs with rich superheavy spectra. This novel and generically relevant result highlights the need for every realistic UV completion model with a large/infinite number of heavy fields coupled to the light Higgs doublets to explicitly account for the large wave function renormalization effects on emergent light Higgs fields in order to be considered a quantitatively well defined candidate UV completion. The NMSGUT predicts large soft Susy breaking trilinear couplings and distinctive sparticle spectra. Measurable or near measurable level of tensor perturbations-and thus large Inflaton mass scale-may be accommodated by Supersymetric Seesaw inflation within the NMSGUT based on an LHN flat direction Inflaton if the Higgs component contains contributions from heavy Higgs components. Successful NMSGUT fits suggest a renormalizable Yukawon Ultra minimal gauged theory of flavor based upon the NMSGUT Higgs structure. *

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SO(10) grand unified theories with dynamical Yukawa couplings

Abstract: Renormalizable SO (10)

Cited by 9 publications

References 31 publications

MSSM Higgs : Window into Susy GUTs

MSSM Higgs : Window into Susy GUTs

Standard model flavor from an SU(2) symmetry

New minimal SO(10) GUT: A theory for all epochs

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