Leptonic CP violation and leptogenesis

Achelashvili, Avtandil; Tavartkiladze, Zurab

doi:10.1063/1.5010116

Cited by 3 publications

(3 citation statements)

References 23 publications

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“…It is desirable to have explanation of texture zeros at more fundamental level, and exploiting flavor symmetries seems to be a good framework. We are planning to pursue this approach in a future work [35].…”

Section: Discussion and Outlookmentioning

confidence: 99%

Texture zero neutrino models and their connection with resonant leptogenesis

Achelashvili

Tavartkiladze

2018

Nuclear Physics B

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Within the low scale resonant leptogenesis scenario, the cosmological CP asymmetry may arise by radiative corrections through the charged lepton Yukawa couplings. While in some cases, as one expects, decisive role is played by the λ τ coupling, we show that in specific neutrino textures only by inclusion of the λ µ the cosmological CP violation is generated at 1-loop level.With the purpose to relate the cosmological CP violation to the leptonic CP phase δ, we consider an extension of MSSM with two right handed neutrinos (RHN), which are degenerate in mass at high scales. Together with this, we first consider two texture zero 3×2 Dirac Yukawa matrices of neutrinos. These via see-saw generated neutrino mass matrices augmented by single ∆L = 2 dimension five (d = 5) operator give predictive neutrino sectors with calculable CP asymmetries. The latter is generated through λ µ,τ coupling(s) at 1-loop level. Detailed analysis of the leptogenesis is performed. We also revise some one texture zero Dirac Yukawa matrices, considered earlier, and show that addition of a single ∆L = 2, d = 5 entry in the neutrino mass matrices, together with newly computed 1-loop corrections to the CP asymmetries, give nice accommodation of the neutrino sector and desirable amount of the baryon asymmetry via the resonant leptogenesis even for rather low RHN masses(∼few TeV -10 7 GeV).

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Section: Discussion and Outlookmentioning

confidence: 99%

Texture zero neutrino models and their connection with resonant leptogenesis

Achelashvili

Tavartkiladze

2018

Nuclear Physics B

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“…Thus, it is interesting to look into the details of the leptogenesis within the scenarios we have considered here. This will be pursued in a subsequent work [65].…”

Section: Type Pmentioning

confidence: 99%

Neutrino mass matrices from two zero 3 × 2 Yukawa textures and minimal d = 5 entries

Achelashvili

Tavartkiladze

2016

Int. J. Mod. Phys. A

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Aiming to relate leptonic CP violating phase δ to the cosmological CP asymmetry, we study the extension of MSSM by two quasi-degenerate (strictly degenerate at tree level) righthanded neutrinos and consider all possible two texture zero 3 × 2 Yukawa matrices plus one ∆L = 2 dimension five (d = 5) operator contributing to the light neutrino mass matrix. We classify all experimentally viable mass matrices, leading to several predictions, and analytically derive predictive relations. We also relate the CP violating δ phase to the CP phase of the thermal leptogenesis.

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“…The phenomenon of charge and parity violation which was originally discovered in the neutral kaon-system via measuring the oscillation probability of K 0 into K 0 [1] is now well understood. It besides being a new effect, had provided the ground for further exploration not only as an independent phenomenon but also its relation with a phenomenon such as Leptogenesis [2][3][4][5], Baryogenesis [6], nature of the Higgs boson [7,8] and Dark matter of the Universe [9][10][11]. The Standard-Model (SM) which is originally CP-symmetric could still allow a tiny amount of CP-violation via the inter-generational mixing of the fermions having identical quantum numbers through CKM-matrices [12].…”

Section: Introductionmentioning

confidence: 99%

T-Odd Anomalous Interactions of the Top-Quark at the Large Hadron Collider

Tiwari

Gupta

2021

Advances in High Energy Physics

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We study the effects of T-odd interactions of top-quark via the pair production of the top-quark in the semileptonic detection modes at the Large Hadron Collider by means of the T-odd observables constructed through the momenta of the observed decay products of the top (and anti-top)-quark for a wide range of CP-violating scale Λ . Estimates on sensitivities of the coupling strength of such interactions for 13 TeV LHC energy with ∫ L d t = 36.1 f b − 1 , 140 f b − 1 and for HL-LHC with 14 TeV energy with integrated luminosities of 0.3 a b − 1 , 1 a b − 1 , 2 a b − 1 , and 3 a b − 1 are also presented for Λ ranging between M W and 2 TeV.

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Leptonic CP violation and leptogenesis

Cited by 3 publications

References 23 publications

Texture zero neutrino models and their connection with resonant leptogenesis

Texture zero neutrino models and their connection with resonant leptogenesis

Neutrino mass matrices from two zero 3 × 2 Yukawa textures and minimal d = 5 entries

T-Odd Anomalous Interactions of the Top-Quark at the Large Hadron Collider

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