A5009661860- Particle physics theoretical and experimental studies
- Semiconductor materials and devices
- Advancements in Semiconductor Devices and Circuit Design
- Quantum Chromodynamics and Particle Interactions
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- High-Energy Particle Collisions Research
- Nanowire Synthesis and Applications
- Integrated Circuits and Semiconductor Failure Analysis
- Semiconductor materials and interfaces
- Cosmology and Gravitation Theories
- Electronic and Structural Properties of Oxides
- Nuclear physics research studies
- Astrophysics and Cosmic Phenomena
- Silicon and Solar Cell Technologies
- Atomic and Molecular Physics
- Black Holes and Theoretical Physics
- Semiconductor Quantum Structures and Devices
- Railway Systems and Energy Efficiency
- Ferroelectric and Negative Capacitance Devices
- GaN-based semiconductor devices and materials
- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Power Systems and Technologies
- Muon and positron interactions and applications
Fermi National Accelerator Laboratory
2014-2024
University of Kentucky
2017-2024
Micron (United States)
2015-2024
Laurentian University
2021
Kentucky Department of Education
2021
Chaminade University of Honolulu
2016-2020
Perimeter Institute
2016-2018
University of Chicago
2010-2017
TRIUMF
2017
University of Hawaiʻi at Mānoa
2016
Amplitudes derived from scattering data on elementary targets are basic inputs to neutrino-nucleus cross section predictions. A prominent example is the isovector axial nucleon form factor, $F_A(q^2)$, which controls charged current signal processes at accelerator-based neutrino oscillation experiments. Previous extractions of $F_A$ neutrino-deuteron rely a dipole shape assumption that introduces an unquantified error. new analysis world for performed using model-independent, and...
We present metal-gate high-k-dielectric enhancement-mode (e-mode) III-V MOSFETs with the highest reported effective mobility and transconductance to date. The devices employ a GaGdO high-k (k = 20) gate stack, Pt gate, delta-doped InGaAs/AlGaAs/GaAs hetero-structure. Typical 1-mum length device figures of merit are given as follows: saturation drive current, I <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">d,sat</sub> 407 muA/mum; threshold...
Constraints from analyticity are combined with experimental electron-proton scattering data to determine the proton charge radius. In contrast previous determinations, we provide a systematic procedure for analyzing arbitrary without model-dependent assumptions on form-factor shape. We also investigate impact of including electron-neutron data, and $\ensuremath{\pi}\ensuremath{\pi}\ensuremath{\rightarrow}N\overline{N}$ data. Using representative sets find...
We perform a new analysis of electron-proton scattering data to determine the proton electric and magnetic radii, enforcing model-independent constraints from form factor analyticity. A wide-ranging study possible systematic effects is performed. An improved developed that rebins taken at identical kinematic settings, avoids scaling assumption errors with statistical errors. Employing standard models for radiative corrections, our 2010 Mainz A1 Collaboration yields radius $r_E = 0.895(20)$...
Models of Weakly Interacting Massive Particles (WIMPs) specified at the electroweak scale are systematically matched to effective theories hadronic scales where WIMP-nucleus scattering observables evaluated. Anomalous dimensions and heavy quark threshold matching conditions computed for complete basis lowest-dimension operators involving quarks gluons. The resulting QCD renormalization group evolution equations solved. status relevant matrix elements is reviewed phenomenological...
As part of the Snowmass process, Cosmic Frontier WIMP Direct Detection subgroup (CF1) has drawn on input from and broader Particle Physics community to produce this document. The charge CF1 was (a) summarize current status projected sensitivity direct detection experiments worldwide, (b) motivate dark matter searches over a broad parameter space by examining spectrum models, (c) establish consensus type experimental program required explore that space, (d) identify common infrastructure...
We determine the nucleon electromagnetic form factors and their uncertainties from world electron scattering data. The analysis incorporates two-photon exchange corrections, constraints on low-Q2 high-Q2 behavior, additional to account for tensions between different data sets in radiative corrections.
The discovery of a standard-model-like Higgs boson and the hitherto absence evidence for other new states may indicate that if weakly interacting massive particles (WIMPs) comprise cosmological dark matter, they are heavy compared to electroweak scale particles, $M\ensuremath{\gg}{m}_{{W}^{\ifmmode\pm\else\textpm\fi{}}}$, ${m}_{{Z}^{0}}$. In this limit, absolute cross section WIMP given quantum numbers scatter from nucleon becomes computable in terms standard model parameters. We develop...
Abstract The next core-collapse supernova in the Milky Way or its satellites will represent a once-in-a-generation opportunity to obtain detailed information about explosion of star and provide significant scientific insight for variety fields because extreme conditions found within. Supernovae our galaxy are not only rare on human timescale but also happen at unscheduled times, so it is crucial be ready use all available instruments capture possible from event. first indication potential...
We point out that current experimental data for partial B --> pi l nu branching fractions reduce the theoretical input required a precise extraction of |V_ub| to form factor normalization at single value pion energy. show heavy-quark expansion provides bound on shape is orders magnitude more stringent than conventional unitarity bounds. find = (3.7 +/- 0.2 0.1) x [0.8/F_+(16 GeV^2)]. The first error from fractions, and second conservative residual uncertainty, both which will improve with...
Quasielastic neutrino-nucleon scattering is a basic signal process for neutrino oscillation studies. At accelerator energies, the corresponding cross section subject to significant uncertainty due poorly constrained axial-vector form factor of nucleon. A model-independent description presented. Data from MiniBooNE experiment quasielastic on carbon are analyzed under assumption definite nuclear model. The value axial mass parameter, m_A=0.85^{+0.22}_{-0.07} +/- 0.09 GeV, found differ...
An unbroken discrete symmetry, analogous to $G$ parity in QCD, exists standard model extensions with vectorlike coupling of electroweak $SU(2)$ ``hidden sector'' fermions that are confined by a strong gauge force. For an arbitrary irreducible representation the hidden sector fermions, lightest states form isotriplet ``pions'' calculable mass splittings and couplings fields. The can be extended real representations color $SU(3)$, provide dark matter candidates distinct collider signatures.
Proton structure effects in hydrogenic bound states are analyzed using nonrelativistic QED effective field theory. Implications for the Lamb shift muonic hydrogen discussed. Model-dependent assumptions previous analyses isolated, and sensitivity to poorly constrained hadronic two-photon exchange contribution is identified.
The parity and time-reversal invariant effective Lagrangian for a heavy fermion interacting with an Abelian gauge field, i.e., NRQED, is constructed through order $1/{M}^{4}$. implementation of Lorentz invariance in the theory becomes nontrivial at this order, complete solution Wilson coefficient constraints obtained. Matching conditions one-fermion sector are presented terms form factors two-photon matrix elements nucleon. extension NRQED to describe interactions light introduced. Sample...
We present formalism necessary to determine weak-scale matching coefficients in the computation of scattering cross sections for putative dark matter candidates interacting with Standard Model. Particular attention is paid heavy-particle limit. A consistent renormalization scheme presence nontrivial residual masses implemented. Two-loop diagrams appearing gluon operators are evaluated. Details given universal limit WIMP-nucleon pure states arbitrary quantum numbers, and singlet-doublet...
Weak capture in muonic hydrogen ($μ$H) as a probe of the chiral properties and nucleon structure predictions Quantum Chromodynamics (QCD) is reviewed. A recent determination axial-vector charge radius squared, $r_A^2(z\; {\rm exp.}) = 0.46(22)\;{\rm fm}^2$, from model independent $z$ expansion analysis neutrino-nucleon scattering data employed conjunction with MuCap measurement singlet rate, $Λ_{\rm singlet}^{\rm MuCap} 715.6(7.4)\;{\rm s}^{-1}$, to update induced pseudoscalar coupling:...
We investigate the ability of <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>μ</a:mi><a:mo stretchy="false">→</a:mo><a:mi>e</a:mi></a:math> facilities, Mu2e and COMET, to probe, or discover, new physics with their detector validation datasets. The response may be performed using a dedicated run <d:math xmlns:d="http://www.w3.org/1998/Math/MathML" display="inline"><d:msup><d:mi>μ</d:mi><d:mo>+</d:mo></d:msup></d:math>, collecting data below Michel edge, <f:math...
Precision measurements of antineutrino elastic scattering on hydrogen from future neutrino experiments offer a unique opportunity to access the low-energy structure protons and neutrons. We discuss determination nucleon axial-vector form factor radius interactions that can be collected at Long-Baseline Neutrino Facility study sources theoretical experimental uncertainties. The projected accuracy would improve existing by 1 order magnitude competitive with contemporary lattice-QCD...