A. Freitas
A5082619854- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Dark Matter and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Cosmology and Gravitation Theories
- Particle Accelerators and Free-Electron Lasers
- Particle Detector Development and Performance
- Computational Physics and Python Applications
- Neutrino Physics Research
- Superconducting Materials and Applications
- Distributed and Parallel Computing Systems
- Atomic and Subatomic Physics Research
- International Science and Diplomacy
- Electromagnetic Scattering and Analysis
- Offshore Engineering and Technologies
- Mathematical functions and polynomials
- Electromagnetic Simulation and Numerical Methods
- Particle accelerators and beam dynamics
- Nuclear physics research studies
- Advanced Mathematical Identities
- Advanced NMR Techniques and Applications
- Physics of Superconductivity and Magnetism
- Numerical methods for differential equations
- Arctic and Antarctic ice dynamics
Deutsches Elektronen-Synchrotron DESY
2015-2024
Johannes Kepler University of Linz
2015-2024
University of Pittsburgh
2015-2024
Sanofi (Brazil)
2023
Fermi National Accelerator Laboratory
2002-2021
Johannes Gutenberg University Mainz
2021
University of Silesia in Katowice
2021
Institute of Physics
2021
Pittsburgh Supercomputing Center
2019
Universidade Federal Fluminense
2017
The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 3,062 new measurements 721 papers, we list, evaluate, average measured properties gauge bosons the recently discovered Higgs boson, leptons, quarks, mesons, baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. All search limits are listed in Summary Tables. also give numerous tables, figures, formulae, reviews...
The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 2,873 new measurements 758 papers, we list, evaluate, average measured properties gauge bosons the recently discovered Higgs boson, leptons, quarks, mesons, baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. Particle search limits are listed in Summary Tables. give numerous tables, figures, formulae, reviews...
Abstract The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 2,143 new measurements 709 papers, we list, evaluate, average measured properties gauge bosons the recently discovered Higgs boson, leptons, quarks, mesons, baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. Particle search limits are listed in Summary Tables. give numerous tables, figures, formulae,...
Abstract The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 3,324 new measurements 878 papers, we list, evaluate, average measured properties gauge bosons the recently discovered Higgs boson, leptons, quarks, mesons, baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. Particle search limits are listed in Summary Tables. give numerous tables, figures, formulae,...
The summarizes much of particle physics and cosmology. Using data from previous editions, plus 2,717 new measurements 869 papers, we list, evaluate, average measured properties gauge bosons the recently discovered Higgs boson, leptons, quarks, mesons, baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. Particle search limits are listed in Summary Tables. give numerous tables, figures, formulae, reviews topics...
This document proposes a collection of simplified models relevant to the design new-physics searches at LHC and characterization their results. Both ATLAS CMS have already presented some results in terms models, we encourage them continue expand this effort, which supplements both signature-based benchmark model interpretations. A is defined by an effective Lagrangian describing interactions small number new particles. Simplified can equally well be described masses cross-sections. These...
The TESLA Technical Design Report Part III: Physics at an e+e- Linear Collider
The presently most accurate prediction for the W-boson mass in standard model is obtained by combining complete two-loop result with known higher-order QCD and electroweak corrections. numerical impact of different contributions analyzed detail. A simple parametrization full presented, which approximates ${M}_{W}$ to better than 0.5 MeV $10\mathrm{GeV}<~{M}_{H}<~1\mathrm{TeV}$ if other parameters are varied within their combined 2\ensuremath{\sigma} region around experimental central values....
We present a definition of the four-dimensional helicity (FDH) regularization scheme valid for two or more loops. This was previously defined and utilized at one loop. It amounts to variation on standard 't Hooft--Veltman is designed be compatible with use states ``observed'' particles. similar dimensional reduction in that it maintains an equal number bosonic fermionic states, as required preserving supersymmetry. Supersymmetry Ward identities relate different amplitudes supersymmetric...
The measured properties of the recently discovered Higgs boson are in good agreement with predictions from Standard Model. However, small deviations couplings may manifest themselves once currently large uncertainties will be improved as part LHC program and at a future factory. We review typical new physics scenarios that lead to observable modifications interactions. They can divided into two broad categories: mixing effects portal models or extended sectors, vertex loop matter gauge...
The pure singlet asymptotic heavy flavor corrections to 3-loop order for the deep-inelastic scattering structure function $F_2(x,Q^2)$ and corresponding transition matrix element $A_{Qq}^{(3), \sf PS}$ in variable number scheme are computed. In Mellin-$N$ space these inclusive quantities depend on generalized harmonic sums. We also recalculate complete anomalous dimension first time. Numerical results Wilson coefficients, operator contribution presented.
We calculate the massive flavor non-singlet Wilson coefficient for heavy contributions to structure function $F_2(x,Q^2)$ in asymptotic region $Q^2 \gg m^2$ and associated operator matrix element $A_{qq,Q}^{(3), \rm NS}(N)$ 3-loop order Quantum Chromodynamics at general values of Mellin variable $N$. This is vector current axial even odd moments $N$, respectively. also corresponding elements transversity, compute anomalous dimensions $O(N_F)$ compare results literature. The matching...
At the LHC, an effective theory of Higgs sector allows us to analyze kinematic distributions in addition inclusive rates, although there is no clear hierarchy scales. We systematically how well dimension-6 operators describe LHC observables comparison full theory, and a range where will be sensitive. The key question breakdown description affects measurements during upcoming run for weakly interacting models. cover modified sectors with singlet doublet extension, new top partners, vector...
New singlet scalar bosons have broad phenomenological utility and feature prominently in many extensions of the Standard Model. Such scalars are often taken to Higgs-like couplings SM fermions order evade stringent flavor bounds, e.g. by assuming Minimal Flavor Violation (MFV), which leads a rather characteristic phenomenology. Here we describe an alternative approach, based on effective field theory framework for new that dominantly couples one specific fermion mass eigenstate. A simple...
Recently, the calculation of fermionic electroweak two-loop corrections to total width Z boson and hadronic Z-peak cross-section in Standard Model has been presented, where "fermionic" refers diagrams with closed fermion loops. Here, these results are complemented by presenting contributions same order for Z-boson partial widths, which last missing pieces a complete description Z-pole physics at order. The definition relevant observables calculational techniques described detail. Numerical...
This article presents results for the last unknown two-loop contributions to Z-boson partial widths and Z-peak cross-section. These are so-called bosonic electroweak corrections, where "bosonic" refers diagrams without closed fermion loops. Together with corresponding Z-pole asymmetries Al,Ab, which have been presented earlier, this completes theoretical description of precision observables at full within Standard Model. The calculation has achieved through a combination different methods:...
Fermion dark matter (DM) interacting with the standard model through a Higgs portal requires non-renormalizable operators, signaling presence of new mediator states at electroweak scale. Collider signatures that involve mediators are powerful tool to experimentally probe interactions, providing complementary information strong constraints set by direct DM detection searches. Indirect experiments less sensitive this scenario. We investigate collider reach for using three minimal...
We calculate 3-loop master integrals for heavy quark correlators and the QCD corrections to $ρ$-parameter. They obey non-factorizing differential equations of second order with more than three singularities, which cannot be factorized in Mellin-$N$ space either. The solution homogeneous is possible terms convergent close integer power series as $_2F_1$ Gauß hypergeometric functions at rational argument. In some cases, this type can mapped complete elliptic This class appears next one arising...
A bstract We present Standard Model predictions for the complete set of phenomenologically relevant electroweak precision pseudo-observables related to Z -boson: leptonic and bottom-quark effective weak mixing angles $$ {\sin}^2{\theta}_{\mathrm{eff}}^{\mathrm{\ell}} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mo>sin</mml:mo> <mml:mn>2</mml:mn> </mml:msup> <mml:msubsup> <mml:mi>θ</mml:mi> <mml:mi>eff</mml:mi> <mml:mi>ℓ</mml:mi> </mml:msubsup> </mml:math> ,...