A5062385446- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Neutrino Physics Research
- Black Holes and Theoretical Physics
- Noncommutative and Quantum Gravity Theories
- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- High-Energy Particle Collisions Research
- Cosmology and Gravitation Theories
- Particle Detector Development and Performance
- Electron Spin Resonance Studies
- Particle Accelerators and Free-Electron Lasers
- Quantum many-body systems
- Algebraic structures and combinatorial models
- Experimental and Theoretical Physics Studies
- Superconducting Materials and Applications
- Atomic and Subatomic Physics Research
- Spectral Theory in Mathematical Physics
- Quantum Mechanics and Applications
- Computational Physics and Python Applications
- Nonlinear Waves and Solitons
- Relativity and Gravitational Theory
- Photochemistry and Electron Transfer Studies
- Scientific Research and Discoveries
- Quantum and Classical Electrodynamics
University of Zagreb
2010-2024
TU Dresden
2020-2022
Johannes Gutenberg University Mainz
1993-1995
Rudjer Boskovic Institute
1984
This chapter of the report "Flavor in era LHC" Workshop discusses theoretical, phenomenological and experimental issues related to flavor phenomena charged lepton sector conserving CP-violating processes. We review current limits main theoretical models for structure fundamental particles. analyze consequences available data, setting constraints on explicit beyond standard model, presenting benchmarks discovery potential forthcoming measurements both at LHC low energy, exploring options...
Low energy neutrinoless lepton flavor violating (LFV) processes are studied in an extension of the Standard Model (SM) by heavy SU(2)xU(1) singlet Dirac neutrinos. An upper bound procedure is elaborated for evaluation amplitudes. A comment on extraction neutrino mixings from astrophysical observations given. For not treated applied model formalism evaluating branching ratios (BRs) presented. The previously carefully examined. Some previous results improved. Special attention paid to...
We study charged lepton flavor violation in low-scale seesaw models of minimal supergravity, which realize large neutrino Yukawa couplings thanks to approximate lepton-number symmetries. There are two dominant sources such models. The first source originates from the usual soft supersymmetry-breaking sector, whilst second one is entirely supersymmetric and comes sector. Within framework we consider both violation, supersymmetric, calculate a number possible lepton-flavor-violating...
The complete tables of Clebsh-Gordan (CG) coefficients for a wide class SO(10) SUSY grand unified theories (GUTs) are given. Explicit expression all states and corresponding multiplets under standard model gauge group G_{321} = SU(3)_C x SU(2)_L U(1)_Y, necessary evaluation the CG presented. GUT considered here incudes most Higgs irreducible representations usually used in literature: 10, 45, 54, 120, 126 126-bar 210. Mass matrices found general superpotential. These results indispensible...
We study the application of Breitenlohner-Maison-'t Hooft-Veltman (BMHV) scheme Dimensional Regularization to renormalization chiral gauge theories, focusing on specific counterterm structure required by non-anticommuting Dirac $\gamma_5$ matrix and breaking BRST invariance. Calculations are performed at one-loop level in a massless Yang-Mills theory with fermions real scalar fields. discuss setup properties regularized detail. Our central results full structures needed for correct...
This review provides a detailed introduction to chiral gauge theories, renormalization theory, and the application of dimensional regularization with non-anticommuting BMHV scheme for γ5. One goal was show how theories can be renormalized despite spurious breaking invariance obtain required symmetry-restoring counterterms. A second familiarize reader theoretical basis theorems that guarantee existence at all orders as consistent quantum theories. Relevant topics include BPHZ renormalization,...
We explicitly show that minimal supersymmetric $SO(10)$ Higgs-Higgsino mass matrices evaluated by various groups are mutually consistent and correct. comment on the corresponding results of other authors. construct one-to-one mappings our approach to approaches
We study a new supersymmetric mechanism for lepton flavor violation in $\ensuremath{\mu}$ and $\ensuremath{\tau}$ decays $\ensuremath{\mu}\ensuremath{\rightarrow}e$ conversion nuclei, within minimal extension of the standard model with low-mass heavy singlet neutrinos sneutrinos. find that $\ensuremath{\mu}\ensuremath{\rightarrow}e\ensuremath{\gamma}$, $\ensuremath{\tau}\ensuremath{\rightarrow}e\ensuremath{\gamma}$...
We consider Yukawa couplings in a theta-exact approach to noncommutative gauge field theory and show that both Dirac singlet Majorana neutrino mass terms can be consistently accommodated. This shows fact the whole neutrino-mass extended standard model on spacetime formulated new nonperturbative (in theta) which eliminates previous restriction of Seiberg-Witten map based theories low-energy phenomena. Spacetime noncommutativity induced between neutrinos photons as well Z-bosons appear quite...
Motivated by the recent investigation of neutrinoless $\tau$-lepton decays CLEO collaboration, we perform a systematic analysis such in possible new-physics scenario with heavy Dirac/Majorana neutrinos, including heavy-neutrino nondecoupling effects, finite quark masses, and as well meson mixings. We find that into an electron or muon pseudoscalar vector can have branching ratios close to experimental sensitivity. Numerical estimates show predominant decay modes this kind are $\tau^-\to...
A bstract We apply the BMHV scheme for non-anticommuting γ 5 to an abelian chiral gauge theory at two-loop level. As our main result, we determine full structure of symmetry-restoring counterterms up These turn out have same as one-loop level and a simple interpretation in terms restoration well-known Ward identities. In addition, show that ultraviolet divergences cannot be canceled completely by generated field parameter renormalization, needed UV divergent evanescent counterterms. The...
The evaluation, systematic analysis and numerical study of the semileptonic $\tau$-lepton decays with two mesons in final state has been made frame standard model extended by right handed neutrinos. In analysis, heavy-neutrino nondecoupling effects, finite quark masses, meson mixings, widths vector mesons, chiral symmetry breakings vector-meson--pseudoscalar-meson vertices effective Higgs-boson--pseudoscalar-meson couplings have included. Numerical estimates reveal that $\tau^-\to...
The triple neutral gauge boson and direct U(1)Y-neutrino interactions, being absent in ordinary field theory, can arise quite naturally noncommutative theories. Using non-perturbative methods a Seiberg–Witten map-based covariant approach to we have found θ-exact expressions for both thereby eliminating previous restrictions low-energy phenomena. In particular, obtain the first time covariant, θ-exact, interactions within standard model sector including an additional gauge-field deformation...
The lepton-flavor-violating decays of light pseudoscalar mesons and baryons are investigated within extensions the $\mathrm{SU}(2)\ifmmode\times\else\texttimes\fi{}U(1)$ model. These models contain heavy Dirac or Majorana neutrinos allow large lepton--heavy-neutrino mixings. free-parameter space these is carefully studied. Special care devoted to comparison results different models. A ``nondecoupling'' window found, decoupling extremely explicitly shown in all except one, for which bounded....
In this paper we count the numbers of real and complex solutions to Bethe constraints in two-particle sector $\mathrm{XXZ}$ model. We find exact number exceptions string conjecture total that is required for completeness.
The N $1s$ near edge x-ray absorption fine structure spectra of acrylonitrile gas are accurately reproduced by a complete ab initio multidimensional vibrational analysis. role ${\ensuremath{\pi}}^{\ensuremath{\ast}}$-orbital localization and hybridization on vibrations accompanying core excitation is discussed. Transition to the ${\ensuremath{\pi}}_{\ensuremath{\perp}}^{\ensuremath{\ast}}(\text{C}=\text{C}\ensuremath{-}\text{C}\ensuremath{\equiv}\text{N})$ delocalized orbital excites mostly...
We study the anomalous magnetic and electric dipole moments of charged leptons in supersymmetric low-scale seesaw models with right-handed neutrino superfields. consider a minimally extended framework minimal supergravity, by assuming that $CP$ violation originates from complex soft SUSY-breaking bilinear trilinear couplings associated sneutrino sector. present numerical estimates muon moment electron moment, as functions key model parameters, such Majorana mass scale ${m}_{N}$...