A5048688859- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Neutrino Physics Research
- High-Energy Particle Collisions Research
- Atomic and Subatomic Physics Research
- Dark Matter and Cosmic Phenomena
- Nuclear physics research studies
- Quantum, superfluid, helium dynamics
- Nuclear Physics and Applications
- Physics of Superconductivity and Magnetism
- Computational Physics and Python Applications
- Particle Accelerators and Free-Electron Lasers
- Advanced Chemical Physics Studies
- Particle Detector Development and Performance
- Superconducting Materials and Applications
- Advanced NMR Techniques and Applications
- Distributed and Parallel Computing Systems
- Particle accelerators and beam dynamics
- Cosmology and Gravitation Theories
- Cold Atom Physics and Bose-Einstein Condensates
- Nuclear reactor physics and engineering
- Atomic and Molecular Physics
- advanced mathematical theories
- Geophysical and Geoelectrical Methods
- Quantum optics and atomic interactions
Los Alamos National Laboratory
2016-2025
Thomas Jefferson National Accelerator Facility
2023-2024
University of Bern
2023-2024
Columbia University
2023
Oak Ridge National Laboratory
2023
Michigan State University
2023
Nvidia (United States)
2023
University of Washington
2023
Argonne National Laboratory
2021
Los Alamos Medical Center
2015
Working in the framework of Standard Model Effective Field Theory, we study chirality-flipping couplings top quark to Higgs and gauge bosons. We discuss detail renormalization group evolution lower energies investigate direct indirect contributions high- low-energy CP-conserving CP-violating observables. Our analysis includes constraints from collider observables, precision electroweak tests, flavor physics, electric dipole moments. find that probes are competitive or dominant for both...
A bstract Recent developments in the Standard Model analysis of semileptonic charged-current processes involving light quarks have revealed ~ 3 σ tensions Cabibbo universality tests meson, neutron, and nuclear beta decays. In this paper, we explore beyond explanations so-called Angle Anomaly framework Effective Field Theory (SMEFT), including not only low-energy charged current (‘L’), but also electroweak precision observables (‘EW’) Drell-Yan collider (‘C’) that probe same underlying...
Within the framework of chiral effective field theory, we discuss leading contributions to neutrinoless double-beta decay transition operator induced by light Majorana neutrinos. Based on renormalization arguments in both dimensional regularization with minimal subtraction and a coordinate-space cutoff scheme, show need introduce leading-order short-range operator, missing all current calculations. We strategies determine finite part coupling matching lattice QCD or relating it via symmetry...
We discuss the phenomenology of right-handed charged currents in framework Standard Model Effective Field Theory, which they arise due to a single gauge-invariant dimension-six operator. study manifestations nine complex couplings $W$ quarks collider physics, flavor and low-energy precision measurements. first obtain constraints on under assumption that operator is dominant correction at observable energies. subsequently impact degeneracies with other Beyond-the-Standard-Model effective...
The process at the heart of neutrinoless double-$\ensuremath{\beta}$ decay, $nn\ensuremath{\rightarrow}pp\phantom{\rule{0.16em}{0ex}}{e}^{\ensuremath{-}}{e}^{\ensuremath{-}}$ induced by a light Majorana neutrino, is investigated in pionless and chiral effective field theory. We show various regularization schemes need to introduce short-range lepton-number-violating operator leading order, confirming earlier findings. demonstrate that such only needed spin-singlet $S$-wave transitions, while...
We analyze neutrinoless double beta decay (0νββ) within the framework of Standard Model Effective Field Theory. Apart from dimension-five Weinberg operator, first contributions appear at dimension seven. classify operators and evolve them to electroweak scale, where we match effective dimension-six, -seven, -nine operators. In next step, after renormalization group evolution QCD construct chiral Lagrangian arising these develop a power-counting scheme derive two-nucleon 0νββ currents up...
This note proposes common standards and prescriptions for the effective-field-theory interpretation of top-quark measurements at LHC.
We investigate neutrinoless double beta decay (0νββ) in the presence of sterile neutrinos with Majorana mass terms. These gauge-singlet fields are allowed to interact Standard-Model (SM) via renormalizable Yukawa couplings as well higher-dimensional gauge-invariant operators up dimension seven Standard Model Effective Field Theory extended neutrinos. At GeV scale, we use Chiral effective field theory involving connect at level quarks and gluons hadronic interactions pions nucleons. This...
Exascale computing could soon enable a predictive theory of nuclear structure and reactions rooted in the Standard Model, with quantifiable systematically improvable uncertainties. Such will help exploit experiments that use nucleons nuclei as laboratories for testing Model its limitations. Examples include direct dark matter detection, neutrinoless double beta decay, searches permanent electric dipole moments neutron atoms. It also connect QCD to properties cold stars hot supernova cores....
The amplitude for the neutrinoless double $\ensuremath{\beta}$ ($0\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$) decay of two-neutron system $nn\ensuremath{\rightarrow}pp{e}^{\ensuremath{-}}{e}^{\ensuremath{-}}$ constitutes a key building block nuclear-structure calculations heavy nuclei employed in large-scale $0\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$ searches. Assuming that process is mediated by light-Majorana-neutrino exchange, systematic analysis chiral effective...
We study radiative corrections to low-energy charged-current processes involving nucleons, such as neutron beta decay and (anti)neutrino-nucleon scattering within a top-down effective-field-theory approach. first match the Standard Model effective theory valid below weak scale and, using renormalization group equations with anomalous dimensions of $\mathcal{O}(\ensuremath{\alpha},\ensuremath{\alpha}{\ensuremath{\alpha}}_{s},{\ensuremath{\alpha}}^{2})$, evolve resulting coupling down hadronic...
We set up the framework for calculation of electric dipole moments (EDMs) light nuclei using systematic expansion provided by chiral effective field theory (EFT). take into account parity ($P$) and time-reversal ($T$) violation which, at quark-gluon level, originates from QCD vacuum angle dimension-six operators capturing physics beyond standard model. argue that EDMs can be expressed in terms six low-energy constants appear $P$- $T$-violating nuclear potential current. As examples, we...
Recent lattice QCD calculations of direct CP violation in $K_L \to \pi \pi$ decays indicate tension with the experimental results. Assuming this to be real, we investigate a possible beyond-the-Standard Model explanation via right-handed charged currents. By using chiral perturbation theory combination results, accurately calculate modification $\epsilon'/\epsilon$ induced by currents and extract values couplings that are necessary explain discrepancy, pointing scale around $10^2$ TeV. We...
We investigate direct and indirect constraints on the complete set of anomalous CP-violating Higgs couplings to quarks gluons originating from dimension-6 operators, by studying their signatures at LHC in electric dipole moments (EDMs). show that existing uncertainties hadronic nuclear matrix elements have a significant impact interpretation EDM experiments, we quantify improvements needed fully exploit power searches. Currently, best bounds interactions come combination measurements data...
We present a master formula describing the neutrinoless-double-beta decay ($0\nu\beta\beta$) rate induced by lepton-number-violating (LNV) operators up to dimension nine in Standard Model Effective Field Theory. provide an end-to-end framework connecting possibly very high LNV scale nuclear scale, through chain of effective field theories. Starting at electroweak we integrate out heavy degrees freedom and match $SU(3)_c\otimes U(1)_{\mathrm{em}}$ theory. After evolving resulting Lagrangian...
We discuss direct and indirect probes of chirality-flipping couplings the top quark to Higgs gauge bosons, considering both $CP$-conserving $CP$-violating observables, in framework Standard Model effective field theory. In our analysis we include current prospective constraints from collider physics, precision electroweak tests, flavor electric dipole moments (EDMs). find that low-energy are very competitive, even after accounting for long-distance uncertainties. particular, EDMs put on 2 3...
We present the first ab initio calculations of neutrinoless double beta decay matrix elements in $A=6$-$12$ nuclei using Variational Monte Carlo wave functions obtained from Argonne $v_{18}$ two-nucleon potential and Illinois-7 three-nucleon interaction. study both light Majorana neutrino exchange potentials arising a large class multi-TeV mechanisms lepton number violation. Our results provide benchmarks to be used testing many-body methods that can extended heavy experimental interest. In...
We study the effects of dimension-8 operators on Drell-Yan production lepton pairs at Large Hadron Collider (LHC). identify a class that leads to novel angular dependence not accounted for in current analyses. The observation such would be smoking-gun signature new physics appearing level. propose an extension currently used basis and show these should observable future LHC analyses realistic values associated Wilson coefficients.
We study $\text{SU}(3)$ flavor-breaking corrections to the relation between octet baryon masses and nucleon-meson $\mathit{CP}$-violating interactions induced by QCD $\overline{\ensuremath{\theta}}$ term. work within framework of chiral perturbation theory through next-to-next-to-leading order in expansion, which is $\mathcal{O}({m}_{q}^{2})$. At lowest order, $\mathit{CP}$-odd couplings term are determined mass splittings octet, classic result Crewther et al. [Phys. Lett. B 88, 123 (1979)]....
We investigate the interplay between high- and low-energy phenomenology of CP-violating interactions Higgs boson with gauge bosons. For this purpose, we use an effective field theory approach consider all dimension-six operators arising in so-called universal theories. compute their loop-induced contributions to electric dipole moments CP asymmetry B→X_{s}γ compare resulting current prospective constraints projected sensitivity LHC. Low-energy measurements are shown generally have a far...
A bstract We present a comprehensive analysis of the potential sensitivity Electron-Ion Collider (EIC) to charged lepton flavor violation (CLFV) in channel ep → τX , within model-independent framework Standard Model Effective Field Theory (SMEFT). compute relevant cross sections leading order QCD and electroweak corrections perform simulations signal SM background events various τ decay channels, suggesting simple cuts enhance associated estimated efficiencies. To assess discovery EIC - e...
We present a method to determine the leading-order (LO) contact term contributing $nn \to pp e^-e^-$ amplitude through exchange of light Majorana neutrinos. Our approach is based on representation as momentum integral known kernel (proportional neutrino propagator) times generalized forward Compton scattering $n(p_1) n(p_2) W^+ (k) p(p_1^\prime) p(p_2^\prime) W^- (k)$, in analogy Cottingham formula for electromagnetic contribution hadron masses. construct model-independent representations...
We present an analysis of the pion-nucleon $\ensuremath{\sigma}$-term ${\ensuremath{\sigma}}_{\ensuremath{\pi}N}$ using six ensembles with $2+1+1$-flavor highly improved staggered quark action generated by MILC Collaboration. The most serious systematic effect in lattice calculations nucleon correlation functions is contribution excited states. estimate these chiral perturbation theory ($\ensuremath{\chi}\mathrm{PT}$) and show that leading to isoscalar scalar charge comes from...