We revisit the thermal leptogenesis scenario in type-I seesaw framework featuring three heavy Majorana neutrinos with a hierarchical mass spectrum. focus on low energy observables, specifically lightest neutrino $m_{\nu}^{\rm lightest}$ and neutrinoless double-beta decay effective parameter $m^{\rm eff}_{\beta\beta}$. In particular, we numerically calculate minimum of neutrino, $M_1^{\rm min}$, required for successful as function $m_{\beta\beta}^{\rm eff}$, considering both normal inverted...

We discuss the prospects of probing ${L}_{\ensuremath{\mu}}\ensuremath{-}{L}_{\ensuremath{\tau}}$ gauge boson at MUonE experiment. The ${Z}^{\ensuremath{'}}$ with a mass $\ensuremath{\lesssim}200\text{ }\text{ }\mathrm{MeV}$, which can explain discrepancy between measured value muon $g\ensuremath{-}2$ and calculated in Standard Model, be produced experiment through process $\ensuremath{\mu}e\ensuremath{\rightarrow}\ensuremath{\mu}e{Z}^{\ensuremath{'}}$. final state decays into pair...

Abstract We define a set of fully Lorentz-invariant wave packets and show that it spans the corresponding one-particle Hilbert subspace, hence whole Fock space as well, with manifestly completeness relation (resolution identity). The position–momentum uncertainty for this packet deviates from ordinary Heisenberg principle, reduces to in non-relativistic limit.

We propose a novel leptogenesis scenario in the gauged $U(1)_{L_{\mu}-L_{\tau}}$ model. Achieving successful symmetric phase is challenging due to absence of CP phase, caused by restriction from gauge symmetry. To overcome this issue, we introduce an additional global symmetry, $U(1)_{B-L}$, and scalar field $\Phi$ responsible for breaking Through kinetic misalignment mechanism, majoron associated with $U(1)_{B-L}$ symmetry has motion early universe. Subsequently, time-dependent background...

We propose a novel formulation for manifestly Lorentz-covariant spinor wave-packet basis. The traditional definition of the wave packet is problematic due to its unavoidable mixing with other packets under Lorentz transformations. Our approach resolves this inherent issue. we develop constitutes complete set, enabling expansion free field while maintaining covariance. Additionally, present Lorentz-invariant expression zero-point energy. Published by American Physical Society 2024

We propose a novel leptogenesis scenario in the gauged <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>U</a:mi><a:mo stretchy="false">(</a:mo><a:mn>1</a:mn><a:msub><a:mo stretchy="false">)</a:mo><a:mrow><a:msub><a:mi>L</a:mi><a:mi>μ</a:mi></a:msub><a:mo>−</a:mo><a:msub><a:mi>L</a:mi><a:mi>τ</a:mi></a:msub></a:mrow></a:msub></a:math> model. Achieving successful <e:math xmlns:e="http://www.w3.org/1998/Math/MathML" display="inline"><e:mi>U</e:mi><e:mo...

If a scalar field couples to the Ricci with large non-minimal coupling, Standard Model coupling parameters can differ above and below an intermediate range of due non-renormalizability. In this paper, we study, for first time, threshold effects on gauge in both Metric Palatini formulations gravity. We find that naturally jumps around scale since counter terms renormalization behave so. becomes strong value effect, there be enhanced small instanton contribution, dilute gas approximation which...

Abstract We revisit the Affleck-Dine leptogenesis via L H_u flat direction with a light slepton field. Although field is favored in low-energy SUSY phenomenologies, such as muon g - 2 anomaly and bino-slepton coannihilation, it may cause problem leptogenesis: create an unwanted charge-breaking vacuum potential so that trapped during course of leptogenesis. investigate conditions under which exists clarify both thermal quantum corrections are important for (temporal) disappearance minimum....

We propose a new formulation of manifestly Lorentz-covariant spinor wave-packet basis. The conventional definition the wave packet is problematic in sense that it suffers from mixing with other packets under Lorentz transformations. Our evades this difficulty mixing. This forms complete set can expand free field covariant manner. In addition, we present Lorentz-invariant expression zero-point energy.

We discuss the prospects of probing $L_μ- L_τ$ gauge boson at MUonE experiment. The $Z^\prime$ with a mass $\lesssim 200$ MeV, which can explain discrepancy between measured value muon $g-2$ and calculated in Standard Model, be produced experiment through process $μe \to μe Z^\prime$. final state decays into pair neutrinos, therefore we cannot observe decay directly. It is, however, still possible to probe this signature by searching for events large scattering angle less energetic...

We revisit the Affleck-Dine leptogenesis via $L H_u$ flat direction with a light slepton field. Although field is favored in low-energy SUSY phenomenologies, such as muon $g-2$ anomaly and bino-slepton coannihilation, it may cause problem leptogenesis: create an unwanted charge-breaking vacuum potential so that trapped during course of leptogenesis. investigate conditions under which exists clarify both thermal quantum corrections are important for (temporal) disappearance minimum. also...

We discuss the thermal leptogenesis mechanism within minimal gauged U(1)$_{L_μ-L_τ}$ model to explain observed baryon asymmetry of Universe (BAU). In such framework, phases Pontecorvo-Maki-Nakagawa-Sakata neutrino mixing matrix and sum Standard Model masses are predictable because a restricted mass structure. Additionally, in context leptogenesis, BAU can be computed terms three remaining free variables that parameterise right-handed their Yukawa couplings Higgs lepton doublets. identify...