A5036795989- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Black Holes and Theoretical Physics
- Cosmology and Gravitation Theories
- Business Process Modeling and Analysis
- Pulsars and Gravitational Waves Research
- Gamma-ray bursts and supernovae
- Service-Oriented Architecture and Web Services
- Blockchain Technology Applications and Security
- Semantic Web and Ontologies
- Geophysics and Gravity Measurements
- Atomic and Subatomic Physics Research
- Neutrino Physics Research
- Particle Detector Development and Performance
- Computational Physics and Python Applications
- Innovative Human-Technology Interaction
- Digital Communication and Language
- Digital Innovation in Industries
- Metal complexes synthesis and properties
- DNA and Nucleic Acid Chemistry
- Nuclear physics research studies
- Cloud Data Security Solutions
- Corporate Governance and Management
- Synthesis and Biological Evaluation
Accadis Hochschule Bad Homburg
2024
University of Würzburg
2007-2023
University of Bayreuth
2018-2023
Hamm-Lippstadt University of Applied Sciences
2021
Istituto Nazionale di Fisica Nucleare, Roma Tor Vergata
2019
University of Glasgow
2019
Michigan State University
2019
Cornell University
2019
University of Padua
2019
Instituto de Física Corpuscular
2019
Using new four-loop results for the heavy quark vacuum polarization and data bottom production in electron-positron annihilation, an update on determination of charm- bottom-quark masses through sum rules has been performed. The previous result charm-quark mass, ${m}_{c}(3\text{ }\text{ }\mathrm{GeV})=0.986(13)\text{ }\mathrm{GeV}$, based lowest moment, is supported by from higher moments which lead to consistent values with comparable errors. value quark, ${m}_{b}(10\text{...
We extend the Rome-Southampton regularization independent momentum-subtraction renormalization scheme(RI/MOM) for bilinear operators to one with a nonexceptional, symmetric subtraction point. Two-point Green's functions insertion of quark are computed scalar, pseudoscalar, vector, axial-vector and tensor at one-loop order in perturbative QCD. call this new scheme RI/SMOM, where S stands "symmetric". Conversion factors derived, which connect RI/SMOM MSbar can be used convert results obtained...
New data for the total cross section $σ(e^+e^-\to{hadrons})$ in charm and bottom threshold region are combined with an improved theoretical analysis, which includes recent four-loop calculations, to determine short distance $\bar{\rm MS}$ quark masses. A detailed discussion of experimental uncertainties is presented. The final result MS}$-masses, $m_c(3 {GeV})=0.986(13)$ GeV $m_b(10 {GeV})=3.609(25)$ GeV, can be translated into $m_c(m_c)=1.286(13)$ $m_b(m_b)=4.164(25)$ GeV. This analysis...
We use lattice QCD simulations, with MILC gluon configurations and HISQ $c$-quark propagators, to make very precise determinations of moments charm-quark pseudoscalar, vector axial-vector correlators. These are combined new four-loop results from continuum perturbation theory obtain several the $\overline{\mathrm{MS}}$ mass charm quark coupling. find ${m}_{c}(3\text{ }\text{ }\mathrm{GeV})=0.986(10)\text{ }\mathrm{GeV}$, or, equivalently, ${m}_{c}({m}_{c})=1.268(9)\text{ both for ${n}_{f}=4$...
Working within the post-Newtonian (PN) approximation to general relativity, we use effective field theory (EFT) framework study conservative dynamics of two-body motion at fourth PN order, fifth order in Newton constant. This is one missing pieces preventing computation full Lagrangian using EFT methods. We exploit analogy between diagrams gravitational and two-point functions massless gauge theory, address calculation four-loop amplitudes by means standard multiloop diagrammatic techniques....
We determine the gravitational interaction between two compact bodies up to sixth power in Newton's constant, G_{N}, static limit. This result is achieved within effective field theory approach general relativity, and exploits a manifest factorization property of diagrams which allows us derive post Newtonian (PN) contributions (2n+1) order terms lower ones. recompute this fashion 1PN 3PN potential, present novel 5PN contribution.
We report on the first realistic ab initio calculation of a hadronic weak decay, that amplitude A(2) for kaon to decay into two π mesons with isospin 2. find ReA(2)=(1.436±0.063(stat)±0.258(syst))10(-8) GeV in good agreement experimental result and hitherto unknown imaginary part we ImA(2)=-(6.83±0.51(stat)±1.30(syst))10(-13) GeV. Moreover combining our ImA(2) values ReA(2), ReA(0), ε'/ε, obtain following value ratio ImA(0)/ReA(0) within standard model:...
We describe the computation of amplitude ${A}_{2}$ for a kaon to decay into two pions with isospin $I=2$. The results presented in [T. Blum et al., Phys. Rev. Lett. 108, 141601 (2012)] from an analysis 63 gluon configurations are updated 146 giving $\mathrm{Re}{A}_{2}=1.381(46{)}_{\mathrm{stat}}(258{)}_{\mathrm{syst}}{10}^{\ensuremath{-}8}\text{ }\text{ }\mathrm{GeV}$ and $\mathrm{Im}{A}_{2}=\ensuremath{-}6.54(46{)}_{\mathrm{stat}}(120{)}_{\mathrm{syst}}{10}^{\ensuremath{-}13}\text{...
We determine the neutral kaon mixing matrix element ${B}_{K}$ in continuum limit with $2+1$ flavors of domain wall fermions, using Iwasaki gauge action at two different lattice spacings. These fermions have near exact chiral symmetry and therefore avoid artificial operator mixing. introduce a significant improvement to conventional nonperturbative renormalization (NPR) method which bare elements are renormalized nonperturbatively regularization invariant momentum scheme (RI-MOM) then...
We present a consistent renormalization scheme for the CP-conserving Two-Higgs-Doublet Model based on $\overline{MS}$ of mixing angles and soft-$Z_2$-symmetry-breaking scale $M_{sb}$ in Higgs sector. This requires to treat tadpoles fully consistently all steps calculation order provide gauge-independent $S$-matrix elements. show how bare physical parameters have be defined verify gauge independence quantities by explicit calculations general $R_ξ$-gauge. The procedure is straightforward...
The four-loop QCD corrections to the electroweak rho parameter arising from top and bottom quark loops are computed. Specifically we evaluate missing "nonsinglet" piece. Using algebraic methods amplitude is reduced a set of around 50 new master integrals which calculated with various analytical numerical methods. inclusion newly completed term halves final value correction for minimally renormalized top-quark mass. predictions shift weak mixing angle W-boson mass thus stabilized.
We report a direct lattice calculation of the $K$ to $\ensuremath{\pi}\ensuremath{\pi}$ decay matrix elements for both $\ensuremath{\Delta}I=1/2$ and $3/2$ amplitudes ${A}_{0}$ ${A}_{2}$ on $2+1$ flavor, domain wall fermion, ${16}^{3}\ifmmode\times\else\texttimes\fi{}32\ifmmode\times\else\texttimes\fi{}16$ lattices. This is complete in which all contractions required ten, four-quark operators are evaluated, including disconnected graphs no quark line connects initial kaon final two-pion...
Light quark masses can be determined through lattice simulations in regularization invariant momentum-subtraction(RI/MOM) schemes. Subsequently, matching factors, computed continuum perturbation theory, are used order to convert these from a RI/MOM scheme the MS-bar scheme. We calculate two-loop corrections quantum chromodynamics(QCD) factors as well three-loop mass anomalous dimensions for RI/SMOM and RI/SMOM_gamma_mu These two schemes characterized by symmetric subtraction point. Providing...
The running of the effective electromagnetic coupling is for many electroweak observables dominant correction. It plays an important role deriving constraints on Standard Model in context precision measurements. We compute four-loop QED corrections to and perform a numerical evaluation different gauge invariant subsets.