A5108043832- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Computational Physics and Python Applications
- Neutrino Physics Research
- Black Holes and Theoretical Physics
- Astrophysics and Cosmic Phenomena
- Particle Accelerators and Free-Electron Lasers
- Medical Imaging Techniques and Applications
- Distributed and Parallel Computing Systems
- Nuclear reactor physics and engineering
- Gamma-ray bursts and supernovae
- Nuclear physics research studies
- International Science and Diplomacy
- Atomic and Subatomic Physics Research
- Noncommutative and Quantum Gravity Theories
- Radiation Therapy and Dosimetry
- Radiation Detection and Scintillator Technologies
- Optical properties and cooling technologies in crystalline materials
- Stochastic processes and statistical mechanics
- Laser-Plasma Interactions and Diagnostics
- Cold Atom Physics and Bose-Einstein Condensates
Universidade Estadual Paulista (Unesp)
2016-2025
Universidade Federal do ABC
2016-2025
A. Alikhanyan National Laboratory
2022-2024
European Organization for Nuclear Research
2012-2024
University of Antwerp
2023-2024
Institute of High Energy Physics
2022-2024
Vrije Universiteit Brussel
2023-2024
Universidade Federal do Estado do Rio de Janeiro
2023
Universidade do Estado do Rio de Janeiro
2023
Université Paris-Saclay
2021
It has recently been pointed out that viable sparticle mass spectra can be generated in Yukawa unified SO(10) supersymmetric grand models consistent with radiative breaking of electroweak symmetry. Model solutions are obtained only if $\tan\beta \sim 50$, $\mu <0$ and positive $D$-term contributions to scalar masses from gauge symmetry used. In this paper, we attempt systematize the parameter space regions where obtained. We go on calculate relic density neutralinos as a function space. No...
The inert 2-Higgs Doublet Model (i2HDM) is a well-motivated minimal consistent Dark Matter (DM) model, but it rather challenging to test at the Large Hadron Collider (LHC) in parameter space allowed by relic density and DM direct detection constraints. This especially true when considering latest XENON 1T data on searches which we use here present best current combined limit i2HDM space. In this analysis, prospects advance exploitation of mono-jet signatures from LHC, emphasising that shape...
We present an analysis of the discovery reach for supersymmetric particles at upgraded Tevatron collider, assuming that SUSY breaking results in universal soft parameters grand unification scale, and lightest particle is stable neutral. first a review literature, including issues unification, renormalization group evolution supersymmetry effect radiative corrections on effective low energy couplings masses theory. consider experimental bounds coming from direct searches those arising...
We examine signals for sparticle production at the Fermilab Tevatron within framework of gauge-mediated supersymmetry breaking models four different model lines, each which leads to qualitatively signatures. identify cuts enhance signal above standard backgrounds, and use ISAJET evaluate reach experiments Main Injector proposed TeV33. For lines that we have examined, find is least as large, frequently larger, than in minimal supergravity framework. two these ability b-quarks...
We study the constraints on vertices $W^+W^- Z\gamma$, $W^+W^-\gamma\gamma$, and $ZZ\gamma\gamma$ that can be obtained from triple-gauge-boson production at next generation of linear $e^+e^-$ colliders operating in $\gamma\gamma$ mode. analyze processes $\gamma\gamma \to W^+W^-V$ ($V=Z$, or $\gamma$) show these reactions increase potential machines to search for anomalous four-gauge-boson interactions.
We examine signals for sparticle production at the CERN Large Hadron Collider (LHC) within framework of gauge mediated supersymmetry breaking models with a low SUSY scale four different model lines, each which leads to qualitatively signatures. first reach LHC via canonical ${E}_{T}$ and multilepton channels that have been advocated MSUGRA framework. Next, we special features these lines could serve further enhance signal over standard backgrounds. use ISAJET evaluate experiments LHC. find...
A promising way to reconcile naturalness with a decoupling solution the SUSY flavor and $\mathrm{CP}$ problems is suggested by models radiatively driven inverted mass hierarchy (RIMH). The RIMH arise naturally within context of $\mathrm{SO}(10)$ grand unified theories. In their original form, suffer from two problems: (1) obtaining radiative breakdown electroweak symmetry; (2) generating correct masses for third generation fermions. first problem can be solved introduction...
Assuming that supersymmetry is realized with parameters in the hyperbolic branch/focus point region of minimal supergravity model, we show by searching for $\mathrm{\text{multijet}}+{E}_{T}^{\mathrm{miss}}$ events tagged $b$ jets reach experiments at LHC may be extended as much 20% from current projections. The reason this gluino decays to third generation quarks are enhanced because lightest neutralino has substantial Higgsino components. Although were motivated perform analysis compatible...
We analyze the potentiality of hadron colliders to search for large extra dimensions via production photon pairs. The virtual exchange Kaluza--Klein gravitons can significantly enhance this processes provided quantum gravity scale ($M_S$) is in TeV range. studied detail subprocesses $q \bar{q} \to \gamma \gamma$ and $g g taking into account complete Standard Model graviton contributions as well unitarity constraints. show that Tevatron Run II will be able probe $M_S$ up 1.5--1.9 at 2$\sigma$...
Supersymmetric models with an inverted mass hierarchy (IMH: multi-TeV first and second generation matter scalars, sub-TeV third Higgs scalars) have been proposed to ameliorate phenomenological problems arising from flavor changing neutral currents (FCNCs) CP violating processes, while satisfying conditions of naturalness. Models IMH already in place at the GUT scale shown be constrained that for many model parameter choices, top squark squared is driven negative values. We delineate regions...
We performed an analysis on the detection of a long-lived slepton at linear collider with $\sqrt{s}=500$ GeV. In GMSB models NLSP is predicted for large value supersymmetry breaking scale $\sqrt{F}$. Furthermore in portion parameter space this particle stau. Such heavy charged particles will leave track tracking volume and hit muonic detector. order to disentangle signal from muon background, we explore kinematics identification tools: time flight device, dE/dX Cerenkov devices. show that be...
We analyze the potential of CERN Large Hadron Collider on reach focus point (FP) region in mSUGRA parameter space. This region, consistent with WMAP results, is characterized by multi-TeV masses for superpartners quarks and leptons relatively light charginos neutralinos. Moreover, since LSP has a substantial higgsino component, it expected that gluino decays predominantly to third generation quarks, producing final state multiple hard b jets. Analyzing events $\not\!\!{E_T}+n$t+ n jets +...
Because of their Yukawa interactions, third generation squarks may be substantially lighter than those the first two generations. Assuming that ${b}_{1}\ensuremath{\rightarrow}b{Z}_{1}$ and ${Z}_{1}$ escapes experimental detection, we show experiments at Main Injector upgrade (integrated luminosity $2{\mathrm{fb}}^{\mathrm{\ensuremath{-}}1}$) Fermilab Tevatron should sensitive to $b$-squark masses up 210 GeV for ${m}_{{Z}_{1}}<~120\mathrm{GeV}.$ For integrated luminosities...
We perform a detailed analysis of the potentiality CERN Large Hadron Collider to study single production leptoquarks via $p\stackrel{\ensuremath{\rightarrow}}{p}{e}^{\ifmmode\pm\else\textpm\fi{}}\stackrel{\ensuremath{\rightarrow}}{q}$ leptoquark $\ensuremath{\rightarrow}{e}^{\ifmmode\pm\else\textpm\fi{}}q,$ with ${e}^{\ifmmode\pm\else\textpm\fi{}}$ generated by splitting photons radiated protons. Working most general $\mathrm{SU}{(2)}_{L}\ensuremath{\bigotimes}\mathrm{U}{(1)}_{Y}$ invariant...
We show that a supersymmetric standard model exhibiting anomaly mediated supersymmetry breaking can generate naturally the observed neutrino mass spectrum as well mixings when we include bilinear R-parity violation interactions. In this model, one of neutrinos gets its due to tree level mixing with neutralinos induced by violating interactions while other two acquire their masses radiative corrections. One interesting feature scenario is lightest particle unstable and decay be at high energy...
We analyze the potential of next generation ${e}^{+}{e}^{\ensuremath{-}}$ linear colliders to search for large extra dimensions via production fermion pairs in association with Kaluza-Klein gravitons $(G),$ i.e., ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}f\overline{f}G.$ This process leads a final state exhibiting significant amount missing energy addition acoplanar lepton or jet pairs. study detail this reaction using full tree level contributions due graviton emission and...
This white paper summarizes the activities of Brazilian community concerning dark matter physics and highlights importance financial support to groups that are deeply involved in experimental endeavours. The flagships program Cherenkov Telescope Array, DARKSIDE, SBN LHC experiments, but we emphasize smaller experiments such as DAMIC CONNIE constitute important probes sectors well should receive special attention. Small projects showing potential probe new regions parameter space models...
We study the production of three gauge bosons (${\mathit{W}}^{+}$${\mathit{W}}^{\mathrm{\ensuremath{-}}}$${\mathit{Z}}^{0}$ and ${\mathit{W}}^{+}$${\mathit{W}}^{\mathrm{\ensuremath{-}}}$\ensuremath{\gamma}) at next generation linear ${\mathit{e}}^{+}$${\mathit{e}}^{\mathrm{\ensuremath{-}}}$ colliders operating in \ensuremath{\gamma}\ensuremath{\gamma} mode. analyze total cross sections as well several kinematical distributions final state particles. find out that a machine mode will produce...
It is generally accepted that the LHC accelerator facility at which weak scale supersymmetry will either be discovered or definitely excluded. I give a brief introduction to presenting general argument limit supersymmetrical spectrum below TeV energies. We see able search for in several of its realization far above expected masses. However, last section we some well motivated scenarios where supersymmetric sparticles might very heavy, thus beyond reach. Such deserve more detailed study push