A5048956956- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Cosmology and Gravitation Theories
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- Black Holes and Theoretical Physics
- Particle Accelerators and Free-Electron Lasers
- Particle Detector Development and Performance
- Superconducting Materials and Applications
- Theoretical and Computational Physics
- Quantum Mechanics and Applications
- Distributed and Parallel Computing Systems
- Relativity and Gravitational Theory
- Atomic and Subatomic Physics Research
- Nuclear physics research studies
- Neutrino Physics Research
- Particle accelerators and beam dynamics
- Medical Imaging Techniques and Applications
- Noncommutative and Quantum Gravity Theories
- Opinion Dynamics and Social Influence
- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Thermodynamics and Statistical Mechanics
- Nuclear reactor physics and engineering
- Crystallography and Radiation Phenomena
Humboldt-Universität zu Berlin
2014-2024
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2016-2020
Deutsches Elektronen-Synchrotron DESY
2005-2019
Max Planck Society
2019
Institute of Particle Physics
2017
Austrian Academy of Sciences
2014
Universität Hamburg
2013
University of Silesia in Katowice
2009-2010
Institute of Physics
2009-2010
Institute of Nuclear Physics, Polish Academy of Sciences
2008
We review the present status of Standard Model calculation anomalous magnetic moment muon. This is performed in a perturbative expansion fine-structure constant $\alpha$ and broken down into pure QED, electroweak, hadronic contributions. The QED contribution by far largest has been evaluated up to including $\mathcal{O}(\alpha^5)$ with negligible numerical uncertainty. electroweak suppressed $(m_\mu/M_W)^2$ only shows at level seventh significant digit. It two loops known better than one...
One-loop corrections to the Higgs-boson decays $H{\ensuremath{\tau}}^{+}{\ensuremath{\tau}}^{\ensuremath{-}}$, $H{W}^{+}{W}^{\ensuremath{-}}$, and $\mathrm{HZZ}$ are calculated up masses of about 1 TeV. The order 10% for $200 \mathrm{GeV}\ensuremath{\lesssim}{m}_{H}\ensuremath{\lesssim}1 \mathrm{TeV}$ within renormalization scheme adopted. Renormalization problems discussed in detail. A complete set one-loop counterterms 't Hooft gauge is presented.
A global fit of parameters allows us to pin down the Hidden Local Symmetry (HLS) effective Lagrangian, which we apply for prediction leading hadronic vacuum polarization contribution muon g−2. The latter is dominated by annihilation channel e + −→π π −, data are available scan (CMD-2 & SND) and ISR (KLOE-2008, KLOE-2010 BaBar) experiments. It well known that different sets not in satisfactory agreement. In fact it possible fix model without using − data, instead dipion spectra measured...
I present a status report of the hadronic vacuum polarization effects for muon g –2, to be considered as an update [1]. The concerns recent new inclusive R measurements from KEDR in energy range 1.84 3.72 GeV. For leading order contributions find [see formula PDF] based on e + - data [incl. τ data], (NLO) and (NNLO). Collecting progress light-by-light scattering adopt π 0 , η η' [95 ± 12] axial-vector [8 3] scalar [-6 1] π, K loops [-20 5] quark [22 4] tensor [1 0] NLO [3 2] which yields...
The discovery of the Higgs by ATLAS and CMS at LHC not only provided last missing building block electroweak Standard Model, mass has been found to have a very peculiar value about 126 GeV, which is such that vacuum stability extending up Planck scale. This may much deeper drawback than anticipated so far. impact on running SM gauge, Yukawa couplings scale discussed in several articles recently. Here we consider masses discuss role quadratic divergences within Model. change sign coefficient...
Previous studies have shown that the Hidden Local Symmetry (HLS) model, supplied with appropriate symmetry breaking mechanisms, provides an effective Lagrangian (Broken Symmetry, BHLS) which encompasses a large number of processes within unified framework. Based on it, global fit procedure allows for simultaneous description $$e^+ e^-$$ annihilation into six final states— $$\pi ^+\pi ^-$$ , ^0\gamma $$ $$\eta \gamma ^-\pi ^0$$ $$K^+K^-$$ $$K_L K_S$$ —and includes dipion spectrum in $$\tau...