A5074366098- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Black Holes and Theoretical Physics
- Neutrino Physics Research
- Quantum Chromodynamics and Particle Interactions
- Noncommutative and Quantum Gravity Theories
- Particle Detector Development and Performance
- Galaxies: Formation, Evolution, Phenomena
- Atomic and Subatomic Physics Research
- Stellar, planetary, and galactic studies
- High-Energy Particle Collisions Research
- Algebraic structures and combinatorial models
- Astronomy and Astrophysical Research
- Solar and Space Plasma Dynamics
- Pulsars and Gravitational Waves Research
- Geophysics and Gravity Measurements
- Relativity and Gravitational Theory
- Scientific Research and Discoveries
- Advanced Topics in Algebra
- Particle Accelerators and Free-Electron Lasers
- Astrophysics and Cosmic Phenomena
- Algebraic and Geometric Analysis
- Nonlinear Waves and Solitons
- Quantum, superfluid, helium dynamics
University of L'Aquila
2010-2025
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso
2004-2025
Rudjer Boskovic Institute
2014-2022
University of Trieste
1996-2018
Istituto Nazionale di Fisica Nucleare, Sezione di Trieste
1996-2018
Gran Sasso Science Institute
2013-2014
Scuola Internazionale Superiore di Studi Avanzati
1996-2014
The Abdus Salam International Centre for Theoretical Physics (ICTP)
2011-2012
University of Ferrara
2010-2011
Istituto Nazionale di Fisica Nucleare
2009
We revisit the issue of limit on scale Left-Right symmetry breaking. focus minimal SU(2)_L x SU(2)_R U(1)_B-L gauge theory with seesaw mechanism and discuss two possibilities defining as parity or charge conjugation. In commonly adopted case parity, we perform a complete numerical study quark mass matrices associated left right mixing without any assumptions usually made in literature about ratio vacuum expectation values. find that usual lower right-handed boson from K difference,...
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...
The Large Hadron Collider has a potential to probe the scale of left-right symmetry restoration and associated lepton number violation. Moreover, it offers hope measuring right-handed leptonic mixing matrix. We show how this, together with constraints from flavor violating processes, can be used make predictions for neutrinoless double beta decay. illustrate this deep connection in case type-II seesaw.
Aims. We derive the value of dark matter density at Sun's location (ρ⊙) without fully modeling mass distribution in Galaxy.
We derive the mass model of Milky Way (MW), crucial for Dark Matter (DM) direct and indirect detection, using recent data a cored dark matter halo profile, which is favoured by studies external galaxies. The method used consists in fitting spherically symmetric Galaxy with Burkert DM profile to available data: MW terminal velocities region inside solar circle, circular velocity as recently estimated from maser star forming regions at intermediate radii, dispersions stellar tracers outermost...
In this article, we revisit the Type II seesaw mechanism based on addition of a weak triplet scalar to standard model. We perform comprehensive study its phenomenology at LHC energies, complete with electroweak precision constraints. pay special attention doubly-charged component, object collider searches for long time, and show how experimental bound mass depends crucially particle spectrum theory. Our can be used as roadmap future studies.
We revisit the $\mathrm{\ensuremath{\Delta}}F=2$ transitions in $K$ and ${B}_{d,s}$ neutral meson systems context of minimal left-right symmetric model. take into account, addition to up-to-date phenomenological data, contributions related renormalization flavor-changing Higgs tree-level amplitude. These were neglected recent discussions, albeit formally needed order obtain a gauge-independent result. Their impact on LR model is crucial twofold. First, effects are relevant $B$ oscillations,...
We use the early Large Hadron Collider data to set lower limit on scale of left-right symmetry, by searching for right-handed charged gauge boson ${W}_{R}$ via final state with two leptons and jets, $33\text{ }\text{ }{\mathrm{pb}}^{\ensuremath{-}1}$ integrated luminosity 7 TeV center-of-mass energy. This signal is kinematically observable neutrino lighter than ${W}_{R}$. In absence a beyond standard model background, we bound ${M}_{{W}_{R}}\ensuremath{\gtrsim}1.4\text{ }\mathrm{TeV}$ at 95%...
Recently, a class of theories massive gravity has been shown to be ghost-free. We study the spherically symmetric solutions in bigravity formulation such theories. In general, admit both Lorentz-invariant and Lorentz-breaking asymptotically flat behavior also fall into two branches. first branch, all can found analytically are Schwarzschild-like, with no modification as is for other classes second exact hard find, relying on perturbation theory, Yukawa-like modifications static potential...
We show that within the left-right symmetric model, lepton number violating decays of Higgs boson can be discovered at LHC. The process is due to mixing with triplet breaks parity. As a result, act as gateway origin heavy Majorana neutrino mass. To assess LHC reach, detailed collider study same-sign dileptons plus jets channel provided. This complementary existing nuclear and searches for violation probe scale parity restoration even beyond other direct searches.
In the context of left-right symmetry, we revisit Keung-Senjanovi\ifmmode \acute{c}\else \'{c}\fi{} production right-handed ${W}_{R}$ bosons and heavy neutrinos $N$ at high energy colliders. We develop a multibinned sensitivity measure use it to estimate for entire range masses, spanning standard merged prompt signals, displaced vertices invisible region. The estimated LHC with 300/fb integrated luminosity ranges from 5 beyond 7 TeV, while future 33(100) TeV collider's reach 3/ab extends 12(26) TeV.
The violation of Baryon Number, $\mathcal{B}$, is an essential ingredient for the preferential creation matter over antimatter needed to account observed baryon asymmetry in universe. However, such a process has yet be experimentally observed. HIBEAM/NNBAR %experiment program proposed two-stage experiment at European Spallation Source (ESS) search number violation. will include high-sensitivity searches processes that violate by one or two units: free neutron-antineutron oscillation...
We study in a systematic way generic nonderivative (massive) deformation of general relativity using the Hamiltonian formalism. The number propagating degrees freedom is analyzed nonperturbative and background independent way. show that condition having only five can be cast set differential equations for deforming potential. Though conditions are rather restrictive, many solutions found.
Collider signals of heavy Majorana neutrino mass origin are studied in the minimal Left-Right symmetric model, where their is generated spontaneously together with breaking lepton number. The right-handed triplet Higgs boson Δ, responsible for such breaking, can be copiously produced at LHC through portal gluon fusion and less so gauge mediated channels. At Δ masses below opening V decay channel, two observable modes pair-production neutrinos via gg → NN pair production triplets from h ΔΔ 4N...
Theories with an extra spin-two field coupled to gravity admit a massive phase broken Lorentz symmetry. While the equivalence principle is respected, Newtonian potentials are in general modified, but they may be protected by scale symmetry of coupling term. The gravitational waves phenomenology quite rich: two gravitons, one and massless, oscillate propagate distinct velocities, different from speed light. A time flight difference between gravitons photons common source would provide clear...
A systematic study of the different phases Lorentz-breaking massive gravity in a curved background is performed. For tensor and vector modes, analysis very close to that Minkowski space. The most interesting results are scalar sector where, generically, there two propagating degrees freedom (DOF). While maximally symmetric spaces ghostlike instabilities inevitable, they can be avoided FRW background. with less than DOF also studied. Curvature allows an interplay mass parameters; particular,...
The scalar sector of the minimal Left-Right model at TeV scale is revisited in light large quartic coupling needed for a heavy flavor-changing scalar. stability and perturbativity effective potential discussed merged with constraints from low-energy processes. Thus perturbative level sharpened. Lower limits on triplet scalars are also derived: left-handed bounded by oblique parameters, while doubly-charged right-handed component limited $h \to \gamma \gamma, Z \gamma$ decays. Current...
We reconsider the lower bound on mass of a fermionic dark matter (DM) candidate resulting from existence known small dwarf spheroidal galaxies, in hypothesis that their DM halo is constituted by degenerate fermions, with phase-space density limited Pauli exclusion principle. By relaxing common assumption scale radius tied to luminous stellar component and marginalizing unknown velocity dispersion anisotropy, we prove observations lead rather weak constraints mass, which could be as low tens...
Within the minimal left-right (LR) symmetric model we revisit predictions for kaon $CP$ violating observables $ϵ$ and ${ϵ}^{\ensuremath{'}}$ in correlation with neutron electric dipole moment. We perform a complete study of cross constraints on parameters, phases ${M}_{{W}_{R}}$ scale, considering two cases extended parity or charge conjugation as LR discrete symmetries, together possible presence Peccei-Quinn symmetry. discuss particular scenarios: whether Standard Model saturates...
We examine the prospect of observing genuine lepton-number-violating (LNV) signals at hadron colliders in context type II seesaw mechanism. The model features smoking gun involving same-sign di-leptons and jets that may be primary observable channel certain regions parameter space. flavor composition final-state charged leptons is related to origin neutrino masses correlated with other rare processes, such as neutrinoless double-beta decay. review existing collider limits provide sensitivity...
Present experiments do not exclude that the neutron n oscillates, with an appreciable probability, into its invisible degenerate twin from a parallel world, so-called mirror n′. These oscillations were searched experimentally by monitoring losses in ultra-cold traps, where they can be revealed magnetic field dependence of n–n′ transition probability. In this work we reanalyze experimental data acquired group A.P. Serebrov at Institute Laue–Langevin, and find more than 5σ away null...