A5047427289- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Black Holes and Theoretical Physics
- Computational Physics and Python Applications
- Particle Detector Development and Performance
- Atomic and Subatomic Physics Research
- Cosmology and Gravitation Theories
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Medical Imaging Techniques and Applications
- Distributed and Parallel Computing Systems
- Data Analysis with R
- Anomaly Detection Techniques and Applications
- International Science and Diplomacy
- Statistics Education and Methodologies
- Particle accelerators and beam dynamics
- Radioactive Decay and Measurement Techniques
- Data-Driven Disease Surveillance
- Complex Systems and Time Series Analysis
- Image Processing and 3D Reconstruction
- Data Visualization and Analytics
- Scientific Computing and Data Management
Monash University
2016-2025
Australian Regenerative Medicine Institute
2025
BOKU University
2023
Iowa State University
2007-2016
Özyeğin University
2014-2016
Massachusetts Institute of Technology
2008
National Center for Theoretical Sciences
2007
National Taiwan University
2007
Argonne National Laboratory
2004
Fermi National Accelerator Laboratory
1992-2001
We discuss weak-vector-boson scattering, at next-to-leading order in QCD, within the framework of hadronic structure functions. use this approach to calculate Higgs-boson production cross section via vector-boson fusion LHC/SSC; we find a modest increase over leading-order prediction. also give expressions for distribution vector bosons proton (effective-$W$ approximation) including ${\cal O} (\alpha_s)$ corrections.
Chiral Lagrangians contain in their coefficients information concerning the underlying fundamental theory. We show that to a large measure this structure is determined by duality with low-mass spectrum of This tested some model theories and then applied QCD. In real world, only vector mesons are light enough pass our criteria for being low mass, practice they do seem dominate phenomenological Lagrangians. raises possibility fusion between vector-dominance ideas rigorous chiral Lagrangian methods.
We study the implications of flavour-changing neutral currents (FCNC's) in a model with $SU(2)_l\times SU(2)_h\times U(1)_Y$ electroweak gauge symmetry for several anomalies appearing $b\to s \ell\bar \ell$ induced $B$ decays LHCb data. In this model, $SU(2)_l$ and $SU(2)_h$ govern left-handed fermions first two generations third generation, respectively. The physical $Z$ $Z'$ generate s$ transition at tree level, leading to additional contributions $b \to semileptonic operators ${\cal...
We consider decays of $B$ and $K$ mesons into a pseudo-scalar or vector meson plus missing energy. Within the SM, these modes originate from flavor changing neutral current (FCNC) processes with two neutrinos in final state. In this paper we experimental upper bounds on interpret difference between SM prediction as window new light invisible particles. particular case where some symmetry requires particles to be produced pairs. first construct general low energy effective Lagrangian coupling...
Belle II recently reported the new measurement <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi mathvariant="script">B</a:mi><a:mo stretchy="false">(</a:mo><a:msup><a:mi>B</a:mi><a:mo>+</a:mo></a:msup><a:mo stretchy="false">→</a:mo><a:msup><a:mi>K</a:mi><a:mo>+</a:mo></a:msup><a:mi>ν</a:mi><a:mover accent="true"><a:mi>ν</a:mi><a:mo stretchy="false">¯</a:mo></a:mover><a:mo stretchy="false">)</a:mo><a:mo>=</a:mo><a:mo...
Abstract Kaon physics is at a turning point – while the rare-kaon experiments NA62 and KOTO are in full swing, end of their lifetime approaching future experimental landscape needs to be defined. With HIKE, KOTO-II LHCb-Phase-II on table under scrutiny, it very good moment time take stock contemplate about opportunities these theoretical developments provide for particle coming decade beyond. This paper provides compact summary talks discussions from Kaons@CERN 2023 workshop, held September CERN.
A bstract Recently Belle II reported the first measurement of B + → K invisible(inv), which is 2 . 7 σ above standard model (SM) prediction. If confirmed, this calls for new physics beyond SM. In SM, invisible particles are neutrino-anti-neutrino pairs. There more possibilities when going work, we focus on decays to dark matter (DM) and show that inv excess from DM relic density can be simultaneously explained in a simple extension The introduces real scalar singlet ϕ acting as candidate,...
A renormalization-group-improved perturbative unitarity bound for elastic scattering amplitudes is proposed. This prescription leads to upper bounds on the Higgs-boson and top-quark masses as a function of energy at which violated new physics enters. Upper scale in models with no Higgs boson are also discussed.
We study the exclusive decays of B mesons into a pair spin-1 mesons. look at occurring asymmetries that could signal CP violation and estimate their relative size. find angular are not significantly smaller than partial-rate asymmetries, can help disentangle complicated dynamics these decays.
We consider the recent LHCb result for Bc→J/ψτν in conjunction with existing anomalies R(D) and R(D⋆) within framework of a right-handed current enhanced couplings to third generation. The model predicts linear relation between observables their SM values terms two combinations parameters. strong constraints from b→sγ on W−W′ mixing effectively remove one parameters resulting an approximate proportionality all three values. To accommodate averages R(D⋆), W′ mass should be near 1 TeV,...
Recent measurements of semileptonic $B$-meson decays into $\tau$-leptons are somewhat higher than expected in the standard model. Although deviations less 3$\sigma$, they suggest possibility new physics affecting primarily $\tau$-lepton. In this paper we examine these results within context non-universal left-right models. We find that strong constraints from $b\to s \gamma$ on $W-W^\prime$ mixing lead to a prediction approximately equal enhancements for $B\to D \tau \nu$ and D^\star modes....
We study meson decays mediated by the heavy gauge bosons of Pati-Salam model quark-lepton unification. consider scenarios in which \ensuremath{\tau} lepton is associated with third, second, and first generation quarks. The most sensitive probes, depending on scenario, are rare K, \ensuremath{\pi}, B decays.
${B}_{s}\ensuremath{-}{\overline{B}}_{s}$ mixing has been measured recently by D0 and CDF. The range predicted in the standard model is consistent with data. However, central values for $\ensuremath{\Delta}{M}_{{B}_{s}}$ also $\ensuremath{\Delta}{M}_{{B}_{d}}$ are away from data which may be indications of new physics. Using observed we study general constraints on flavor changing ${Z}^{\ensuremath{'}}$ interactions. In models nonuniversal couplings find that significant enhancements over...
At future high-energy accelerators, the traditional methods of studying CP nonconservation will no longer be useful. We present potential new ways to find at ${\mathrm{e}}^{+}$${\mathrm{e}}^{\mathrm{\ensuremath{-}}}$ and pp\ifmmode\bar\else\textasciimacron\fi{} colliders which use jet variables in inclusive or semi-inclusive processes. These make asymmetries formed with beam momenta. Signals are estimated standard model appear small, but tests could sensitive interactions become visible...
We review the present status of CP violation and critically assess various tests this symmetry which have been proposed. Future progress in subject requires new experimental information distinct from measurement parameter ε. find that there exist experiments are potentially feasible, although all such reasonably difficult. The theoretical analysis CP-odd observables is reviewed many cases updated.
We discuss the modes $B\to K^{(*)}\nu\bar\nu$ in context of non-standard neutrino interactions that add incoherently to SM rates. consider two scenarios: an additional light neutrino; and lepton flavour violation. find interacts with fields via a non-universal $Z^\prime$ can increase $R^\nu_{K^{(*)}}$ by up factor without conflicting $B_s-\bar B_s$ mixing. This model then predicts rates for $B_s\to \tau^+\tau^-$ six times larger than SM. In violation mediated leptoquarks we current...
We analyse the potential of proposed μ+μ+ and μ+e− collider μTRISTAN to complement searches for charged-lepton flavour-violation (CLFV) that can be carried out by Belle II. offers possibility directly producing studying new resonances could mediate CLFV a certain range masses. In addition, we find it produce competitive bounds those from II cases where resonance lies beyond direct reach. illustrate these points with three Z3 "lepton triality" models, also an example only probed μTRISTAN....
Motivated by the LHCb measurement of hyperon decay mode <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:msup><a:mrow><a:mi mathvariant="normal">Σ</a:mi></a:mrow><a:mrow><a:mo>+</a:mo></a:mrow></a:msup><a:mo stretchy="false">→</a:mo><a:mi>p</a:mi><a:msup><a:mrow><a:mi>μ</a:mi></a:mrow><a:mrow><a:mo>+</a:mo></a:mrow></a:msup><a:msup><a:mrow><a:mi>μ</a:mi></a:mrow><a:mrow><a:mo>−</a:mo></a:mrow></a:msup></a:mrow></a:math> and prospects for improvement, we...
Recently the Belle II Collaboration has reported a measurement of $B^+\to K^+\nu\bar\nu$ rate that is higher than standard-model expectation. Since emitted neutrinos are unobserved, excess could be due to $B^+$ decaying into $K^+$ and dark-matter pair. We entertain this possibility in two-Higgs-doublet model supplemented with real singlet scalar boson acting as dark matter. This also accommodates strangeness-changing interactions providing new sources $CP$ violation which can affect hyperon...
We point out that the decay mode ${K}_{L}$\ensuremath{\rightarrow}${\ensuremath{\pi}}^{0}$${e}^{+}$${e}^{\mathrm{\ensuremath{-}}}$ is predominantly CP violating in standard model and expected to occur with a branching ratio of several parts ${10}^{12}$. The should be sensitive direct \ensuremath{\Delta}S=1 violation. Analysis Dalitz plot may enable CP-violating nature process confirmed.
We analyze results on \ensuremath{\pi}-\ensuremath{\pi} scattering using a framework based nonlinear chiral Lagrangians both at the tree level and one-loop order. Overall data can be well understood up to energies of 0.7--0.8 GeV, as threshold, some Lagrangian parameters are determined. As side comment, we note that Skyrmion solution is stable given this experimental fourth-order Lagrangian, but its mass about 70% too high.