Squeezing out predictions with leptogenesis from SO(10)

Buccella, F.; Falcone, D.; Fong, Chee Sheng; Nardi, Enrico; Ricciardi, Giulia

doi:10.1103/physrevd.86.035012

Cited by 49 publications

(51 citation statements)

References 63 publications

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“…However, as already noticed in [31], this special case necessarily implies a huge finetuning in the seesaw formula. 22 In any case a compact spectrum solution gives rise to a distinct set of constraints on low energy neutrino parameters [52], in particular it predicts no signal in 0νββ experiments since m ee 1 meV, while in our case the bulk of the solutions implies a detectable signal despite NO.…”

Section: Jhep10(2017)029mentioning

confidence: 99%

See 1 more Smart Citation

A full analytic solution of SO(10)-inspired leptogenesis

Bari

Fiorentin

2017

J. High Energ. Phys.

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Recent encouraging experimental results on neutrino mixing parameters prompt further investigation on SO(10)-inspired leptogenesis and on the associated strong thermal solution that has correctly predicted a non-vanishing reactor mixing angle, it further predicts sin δ 0, now supported by recent results at ∼ 95% C.L., normally ordered neutrino masses and atmospheric mixing angle in the first octant, best fit results in latest global analyses. Extending a recent analytical procedure, we account for the mismatch between the Yukawa basis and the weak basis, that in SO(10)-inspired models is described by a CKM-like unitary transformation V L , obtaining a full analytical solution that provides useful insight and reproduces accurately all numerical results, paving the way for future inclusion of different sources of theoretical uncertainties and for a statistical analysis of the constraints. We show how muon-dominated solutions appear for large values of the lightest neutrino mass in the range (0.01-1) eV but also how they necessarily require a mild fine tuning in the seesaw relation. For the dominant (and untuned) tauon-dominated solutions we show analytically how, turning on V L V CKM , some of the constraints on the low energy neutrino parameters get significantly relaxed. In particular we show how the upper bound on the atmospheric neutrino mixing angle in the strong thermal solution gets relaxed from θ 23 41 • to θ 23 44 • , an important effect in the light of the most recent NOνA, T2K and IceCube results.

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Section: Jhep10(2017)029mentioning

confidence: 99%

“…21 The conditions for this compact spectrum were studied in [36] and more recently, including flavour effects and within a realistic model, in [52]. However, as already noticed in [31], this special case necessarily implies a huge finetuning in the seesaw formula.…”

Section: Jhep10(2017)029mentioning

confidence: 99%

A full analytic solution of SO(10)-inspired leptogenesis

Bari

Fiorentin

2017

J. High Energ. Phys.

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“…In the present work, we will study a non-supersymmetric extension of the SM model based on the gauge group SO (10), which has often been discussed in the previous literature [3][4][5][6][7][8][9][10][11][12][13]. The gauge group SO(10) has the clear advantage that all SM fermions, including right-handed neutrinos, belong to the same 16 representation.…”

Section: Introductionmentioning

confidence: 99%

Effects of intermediate scales on renormalization group running of fermion observables in an SO(10) model

Meloni

Ohlsson

Riad

2014

J. High Energ. Phys.

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In the context of non-supersymmetric SO(10) models, we analyze the renormalization group equations for the fermions (including neutrinos) from the GUT energy scale down to the electroweak energy scale, explicitly taking into account the effects of an intermediate energy scale induced by a Pati-Salam gauge group. To determine the renormalization group running, we use a numerical minimization procedure based on a nested sampling algorithm that randomly generates the values of 19 model parameters at the GUT scale, evolves them, and finally constructs the values of the physical observables and compares them to the existing experimental data at the electroweak scale. We show that the evolved fermion masses and mixings present sizable deviations from the values obtained without including the effects of the intermediate scale.

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“…trying to remain consistent with all the phenomenological constraints and predicting their own experimental signatures [8,15,16,17,18,19,9,20]. SO(10) grand unified theory [21] is undoubtedly the best motivated candidate in the abovementioned class of models.…”

Section: Introductionmentioning

confidence: 99%

Minimal nonsupersymmetricSO(10)model: Gauge coupling unification, proton decay, and fermion masses

Babu

Khan

2015

Phys. Rev. D

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We present a minimal renormalizable non-supersymmetric SO(10) grand unified model with a symmetry breaking sector consisting of Higgs fields in the 54 H + 126 H + 10 H representations. This model admits a single intermediate scale associated with Pati-Salam symmetry along with a discrete parity. Spontaneous symmetry breaking, the unification of gauge couplings and proton lifetime estimates are studied in detail in this framework. Including threshold corrections self-consistently, obtained from a full analysis of the Higgs potential, we show that the model is compatible with the current experimental bound on proton lifetime. The model generally predicts an upper bound of few times 10 35 yrs for proton lifetime, which is not too far from the present Super-Kamiokande limit of τ p 1.29 × 10 34 yrs. With the help of a Pecci-Quinn symmetry and the resulting axion, the model provides a suitable dark matter candidate while also solving the strong CP problem. The intermediate scale, M I ≈ (10 13 − 10 14 ) GeV which is also the B − L scale, is of the right order for the righthanded neutrino mass which enables a successful description of light neutrino masses and oscillations. The Yukawa sector of the model consists of only two matrices in family space and leads to a predictive scenario for quark and lepton masses and mixings. The branching ratios for proton decay are calculable with the leading modes being p → e + π 0 and p → νπ + .Even though the model predicts no new physics within the reach of LHC, the next generation proton decay detectors and axion search experiments have the capability to pass verdict on this minimal scenario. *

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Squeezing out predictions with leptogenesis from SO(10)

Cited by 49 publications

References 63 publications

A full analytic solution of SO(10)-inspired leptogenesis

A full analytic solution of SO(10)-inspired leptogenesis

Effects of intermediate scales on renormalization group running of fermion observables in an SO(10) model

Minimal nonsupersymmetricSO(10)model: Gauge coupling unification, proton decay, and fermion masses

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