Brian D. Fields
A5013197591- Gamma-ray bursts and supernovae
- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Stellar, planetary, and galactic studies
- Cosmology and Gravitation Theories
- Astro and Planetary Science
- Neutrino Physics Research
- Astronomy and Astrophysical Research
- Solar and Space Plasma Dynamics
- Galaxies: Formation, Evolution, Phenomena
- Astrophysics and Star Formation Studies
- Nuclear physics research studies
- Radio Astronomy Observations and Technology
- Pulsars and Gravitational Waves Research
- History and Developments in Astronomy
- Planetary Science and Exploration
- Atmospheric Ozone and Climate
- Particle Detector Development and Performance
- Methane Hydrates and Related Phenomena
- Computational Physics and Python Applications
- Mechanical and Optical Resonators
- Geophysics and Gravity Measurements
- Scientific Research and Discoveries
- Photonic and Optical Devices
University of Illinois System
2023-2024
University of Illinois Urbana-Champaign
2015-2024
National Center for Supercomputing Applications
2021
Purdue University West Lafayette
2021
Astronomy and Space
2004-2018
Joint Institute for Nuclear Astrophysics
2016
Goddard Space Flight Center
2016
University of Maryland, Baltimore County
2016
University of Maryland, College Park
2014
University of Novi Sad
2011
The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 3,062 new measurements 721 papers, we list, evaluate, average measured properties gauge bosons the recently discovered Higgs boson, leptons, quarks, mesons, baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. All search limits are listed in Summary Tables. also give numerous tables, figures, formulae, reviews...
The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 2,873 new measurements 758 papers, we list, evaluate, average measured properties gauge bosons the recently discovered Higgs boson, leptons, quarks, mesons, baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. Particle search limits are listed in Summary Tables. give numerous tables, figures, formulae, reviews...
A critical review is given of the current status cosmological nucleosynthesis. In framework Standard Model with 3 types relativistic neutrinos, baryon-to-photon ratio, $\eta$, corresponding to inferred primordial abundances deuterium and helium-4 consistent independent determination $\eta$ from observations anisotropies in cosmic microwave background. However abundance lithium-7 significantly below its expected value. Taking systematic uncertainties estimates into account, there overall...
This biennial Review summarizes much of particle physics. Using data from previous editions, plus 2658 new measurements 644 papers, we list, evaluate, and average measured properties gauge bosons, leptons, quarks, mesons, baryons. We summarize searches for hypothetical particles such as Higgs heavy neutrinos, supersymmetric particles. All the search limits are listed in Summary Tables. also give numerous tables, figures, formulae, reviews topics Standard Model, detectors, probability,...
Abstract The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 2,143 new measurements 709 papers, we list, evaluate, average measured properties gauge bosons the recently discovered Higgs boson, leptons, quarks, mesons, baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. Particle search limits are listed in Summary Tables. give numerous tables, figures, formulae,...
Abstract The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 3,324 new measurements 878 papers, we list, evaluate, average measured properties gauge bosons the recently discovered Higgs boson, leptons, quarks, mesons, baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. Particle search limits are listed in Summary Tables. give numerous tables, figures, formulae,...
A critical review is given of the current status cosmological nucleosynthesis. In framework Standard Model with 3 types relativistic neutrinos, baryon-to-photon ratio, $\eta$, corresponding to inferred primordial abundances deuterium and helium-4 consistent independent determination $\eta$ from WMAP observations anisotropies in cosmic microwave background. However abundance lithium-7 significantly below its expected value. Taking systematic uncertainties estimates into account, there overall...
A survey that can cover the sky in optical bands over wide fields to faint magnitudes with a fast cadence will enable many of exciting science opportunities next decade. The Large Synoptic Survey Telescope (LSST) have an effective aperture 6.7 meters and imaging camera field view 9.6 deg^2, be devoted ten-year 20,000 deg^2 south +15 deg. Each pointing imaged 2000 times fifteen second exposures six broad from 0.35 1.1 microns, total point-source depth r~27.5. LSST Science Book describes basic...
How do we understand the production of lightest nuclides from H to Li during first seconds cosmic time? This article reviews recent developments based on new precision microwave background measurements Planck satellite and observational abundance data. Utilizing updated input nuclear reactions neutron lifetime as well limits baryon density Universe obtained data leads a number neutrino flavors.
The summarizes much of particle physics and cosmology. Using data from previous editions, plus 2,717 new measurements 869 papers, we list, evaluate, average measured properties gauge bosons the recently discovered Higgs boson, leptons, quarks, mesons, baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. Particle search limits are listed in Summary Tables. give numerous tables, figures, formulae, reviews topics...
Big-bang nucleosynthesis (BBN) theory, together with the precise WMAP cosmic baryon density, makes tight predictions for abundances of lightest elements. Deuterium and 4He measurements agree well expectations, but 7Li observations lie a factor 3-4 below BBN+WMAP prediction. This 4-5\sigma\ mismatch constitutes "lithium problem," disparate solutions possible. (1) Astrophysical systematics in could exist are increasingly constrained. (2) Nuclear physics experiments provide wealth well-measured...
The lithium problem arises from the significant discrepancy between primordial 7 Li abundance as predicted by big bang nucleosynthesis (BBN) theory and Wilkinson Microwave Anisotropy Probe (WMAP) baryon density, pre-Galactic inferred observations of metal-poor (Population II) stars. This has loomed for past decade, with a persistent factor 2–3 in / H. Recent developments have sharpened all aspects problem. Namely: (1) BBN predictions due to new nuclear data; particular, uncertainty on...
Abstract We present new Big Bang Nucleosynthesis (BBN) limits on the cosmic expansion rate or relativistic energy density, quantified via number N ν of equivalent neutrino species. use latest light element observations, neutron mean lifetime, and update our evaluation for nuclear rates d + ⟶ 3 He n H+ p . Combining this result with independent constraints from microwave background (CMB) yields tight physics that perturbs η prior to nucleosynthesis: a joint BBN+CMB analysis gives = 2.898 ±...
We reexamine the upper limits on abundance of unstable massive relic particles provided by success big-bang nucleosynthesis calculations. use cosmic microwave background data to constrain baryon-to-photon ratio, and incorporate an extensively updated compilation cross sections into a new calculation network reactions induced electromagnetic showers that create destroy light elements deuterium, ${}^{3}$He, ${}^{4}$He, ${}^{6}$Li ${}^{7}$Li. derive analytic approximations complement check full...
This biennial Review summarizes much of Particle Physics. Using data from previous editions, plus 2205 new measurements 667 papers, we list, evaluate, and average measured properties gauge bosons, leptons, quarks, mesons, baryons. We also summarize searches for hypothetical particles such as Higgs heavy neutrinos, supersymmetric particles. All the particle search limits are listed in Summary Tables. give numerous tables, figures, formulae, reviews topics Standard Model, detectors,...
Big bang nucleosynthesis has long provided the primary determination of cosmic baryon density ΩBh2, or equivalently baryon-to-photon ratio, η. Recently, data on CMB anisotropies have become increasingly sensitive to The comparison these two independent measures provides a key test for big cosmology. first release results from Wilkinson Microwave Anisotropy Probe (WMAP) marks milestone in this test. With precision WMAP, now offers significantly stronger constraint We discuss current state BBN...
We assess the status of big-bang nucleosynthesis (BBN) in light final Planck data release and other recent developments, anticipation future measurements. fix cosmic baryon density to 0.9% precision, determine helium abundance effective number neutrinos with precision approaching that astronomical BBN determinations respectively. In addition, new high-redshift measurements give D/H better than theoretical predictions, Li/H reconfirm lithium problem. present ${}^{7}{\rm Be}(n,p){}^{7}{\rm...