A5015942423- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Dark Matter and Cosmic Phenomena
- Gamma-ray bursts and supernovae
- Nuclear physics research studies
- Radio Astronomy Observations and Technology
- Pulsars and Gravitational Waves Research
- Astronomy and Astrophysical Research
- Magnetic confinement fusion research
- Stellar, planetary, and galactic studies
- Scientific Research and Discoveries
- Superconducting and THz Device Technology
- Fusion materials and technologies
- Superconducting Materials and Applications
- Astro and Planetary Science
- High-Energy Particle Collisions Research
- Geophysics and Gravity Measurements
- Nuclear Physics and Applications
- Relativity and Gravitational Theory
- Particle accelerators and beam dynamics
- Galaxies: Formation, Evolution, Phenomena
- Nuclear reactor physics and engineering
- Black Holes and Theoretical Physics
University of California, San Diego
2016-2025
University of California System
2024
Princeton University
2021
Universidad Católica Santo Domingo
1997-2016
Shanghai Jiao Tong University
2016
New Mexico Consortium
2012-2015
Kavli Institute for Particle Astrophysics and Cosmology
2014
University of Chicago
1984-2014
UC San Diego Health System
2014
University of Washington
1994-2008
The Simons Observatory (SO) is a new cosmic microwave background experiment being built on Cerro Toco in Chile, due to begin observations the early 2020s. We describe scientific goals of experiment, motivate design, and forecast its performance. SO will measure temperature polarization anisotropy six frequency bands: 27, 39, 93, 145, 225 280 GHz. initial configuration have three small-aperture 0.5-m telescopes (SATs) one large-aperture 6-m telescope (LAT), with total 60,000 cryogenic...
We propose a new and unique dark matter candidate: $\ensuremath{\sim}100$ eV to $\ensuremath{\sim}10$ keV sterile neutrinos produced via lepton-number-driven resonant Mikheyev-Smirnov-Wolfenstein conversion of active neutrinos. The requisite lepton number asymmetries in any the neutrino flavors range from ${10}^{\ensuremath{-}3}$ ${10}^{\ensuremath{-}1}$ photon number. feature here is that adiabaticity condition resonance strongly favors production lower energy resulting nonthermal (cold)...
We review the rich phenomena associated with neutrino flavor transformation in presence of self-coupling. Our exposition centers on three collective oscillation scenarios: a simple bipolar system that initially consists mono-energetic electron neutrinos and antineutrinos; homogeneous isotropic gas multiple neutrino/antineutrino species continuous energy spectra; generic an anisotropic environment. use each these scenarios to illustrate key facets oscillations. discuss implications...
High-resolution spectra obtained with three ground-based facilities and the Hubble Space Telescope (HST) have been combined to produce a new abundance analysis of CS 22892-052, an extremely metal-poor giant large relative enhancements neutron capture elements. A revised model stellar atmosphere has derived aid number Fe peak transitions, including both neutral ionized species six Several elements, Mo, Lu, Au, Pt, Pb, detected for first time in significant upper limits placed on abundances...
We calculate the incoherent resonant and non-resonant scattering production of sterile neutrinos in early universe. find ranges neutrino masses, vacuum mixing angles, initial lepton numbers which allow these species to constitute viable hot, warm, cold dark matter (HDM, WDM, CDM) candidates meet observational constraints. The constraints considered here include energy loss core collapse supernovae, density limits at big bang nucleosynthesis, those stemming from decay: observed cosmic...
view Abstract Citations (434) References (13) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Stellar weak interaction rates for intermediate-mass nuclei. IV - Interpolation procedures rapidly varying lepton capture using effective log (ft)-values Fuller, G. M. ; Fowler, W. A. Newman, J. Simple expressions continuum electron and positron phase space factors the associated neutrino energy loss integrals are presented in terms of standard Fermi integrals....
This book lays out the scientific goals to be addressed by next-generation ground-based cosmic microwave background experiment, CMB-S4, envisioned consist of dedicated telescopes at South Pole, high Chilean Atacama plateau and possibly a northern hemisphere site, all equipped with new superconducting cameras. CMB-S4 will dramatically advance cosmological studies crossing critical thresholds in search for B-mode polarization signature primordial gravitational waves, determination number...
view Abstract Citations (407) References (27) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Stellar weak interaction rates for intermediate-mass nuclei. II - A = 21 to 60 Fuller, G. M. ; Fowler, W. A. Newman, J. Astrophysical electron and positron emission, continuum capture rates, associated neutrino energy loss are calculated free nucleons 226 nuclei with masses between 60. Where available, measured nuclear level information matrix elements used. Simple...
view Abstract Citations (434) References (9) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Stellar weak interaction rates for intermediate mass nuclei. III - Rate tables the free nucleons and nuclei with A = 21 to 60 Fuller, G. M. ; Fowler, W. A. Newman, J. electron positron emission continuum capture rates, as well associated neutrino energy loss are tabulated 226 masses between =21 60. These were calculated in accordance procedure described I II of this...
We present results of large-scale numerical simulations the evolution neutrino and antineutrino flavors in region above late-time post-supernova-explosion proto-neutron star. Our calculations are first to allow explicit flavor histories on different trajectories self-consistently couple development these through forward scattering-induced quantum coupling. Employing atmospheric-scale mass-squared difference...
view Abstract Citations (399) References (28) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Stellar weak-interaction rates for sd-shell nuclei. I - Nuclear matrix element systematics with application to Al-26 and selected nuclei of importance the supernova problem Fuller, G. M. ; Fowler, W. A. Newman, J. Astrophysical positron emission, continuum electron capture, neutrino energy loss are calculated 26Al → 26Mg, 30P 30Si;, 31S 31P, 32S 32P 33S 33P, 35Cl...
We present a comprehensive review of keV-scale sterile neutrino Dark Matter, collecting views and insights from all disciplines involved - cosmology, astrophysics, nuclear, particle physics in each case viewed both theoretical experimental/observational perspectives. After reviewing the role active neutrinos physics, we focus on context Matter puzzle. Here, first motivation for based challenges tensions purely cold scenarios. then round out discussion by critically summarizing known...
We have combined new high-resolution spectra obtained with the Hubble Space Telescope (HST) and ground-based facilities to make a comprehensive abundance analysis of metal-poor, halo star BD +17°3248. detected third r-process peak elements osmium, platinum, (for first time in metal-poor star) gold, whose abundances can only be reliably determined using HST. Our observations illustrate pattern seen other similar stars heavier neutron capture elements, including consistent scaled solar system...
We examine coherent active-active channel neutrino flavor evolution in environments where neutrino-neutrino forward scattering can engender large-scale collective transformation. introduce the concept of isospin which treats neutrinos and antineutrinos on an equal footing, facilitates analysis systems terms spin precession analogy. point out a key quantity, ``total effective energy,'' is conserved several important regimes. Using this concept, we analyze antineutrino oscillation synchronized...
First results are reported of a new abundance study neutron-capture elements in the ultra-metal-poor (&sqbl0;Fe&solm0;H&sqbr0;=-3.1) halo field giant star CS 22892-052. Using high-resolution, high signal-to-noise ratio spectra, abundances more than 30 (Z>30) have been determined. Six 40<Z<56 domain (Nb, Ru, Rh, Pd, Ag, and Cd) detected for first time an star. Abundances also derived three heaviest stable (Os, Ir, Pb). A second transition thorium, Th ii lambda4086, confirms deduced from...
view Abstract Citations (265) References (24) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Quark-Hadron Phase Transition and Primordial Nucleosynthesis Alcock, C. ; Fuller, G. M. Mathews, J. A simple model for the quark-hadron phase transition is constructed based on bag quark-gluon plasma, known spectrum of hadronic states, elementary statistical techniques. most important parameters are constant fraction volume universe which in high baryon density...
We use heavy element nucleosynthesis from supernovae to probe the mixing of ${\ensuremath{\nu}}_{\mathit{e}}$ with ${\ensuremath{\nu}}_{\mathrm{\ensuremath{\tau}}}$ (or ${\ensuremath{\nu}}_{\mathrm{\ensuremath{\mu}}}$) possessing cosmologically significant masses (1 100 eV). conclude that ${\ensuremath{\nu}}_{\mathrm{\ensuremath{\tau}}}$(${\ensuremath{\nu}}_{\mathrm{\ensuremath{\mu}}}$)-${\ensuremath{\nu}}_{\mathit{e}}$ vacuum angle must satisfy...
We point out a serendipitous link between warm dark matter (WDM) models for structure formation on the one hand and high-sensitivity energy range (1-10 keV) X-ray photon detection Chandra XMM-Newton observatories other. This fortuitous match may provide either direct of or exclusion many candidates. estimate expected fluxes from field galaxies clusters if halos these objects are composed WDM candidate particles with rest masses in formation-preferred (~1 to ~20 small radiative decay...
We calculate coherent neutrino and antineutrino flavor transformation in the supernova environment, for first time including self-consistent coupling of intersecting trajectories. For mass-squared difference /deltam2/ = 3 x 10(-3) eV2 we find that normal (inverted) mass hierarchy more tangentially-propagating (radially-propagating) neutrinos antineutrinos can initiate collective, simultaneous medium-enhanced conversion these particles across broad ranges energy propagation direction....
view Abstract Citations (159) References (27) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Resonant Neutrino Oscillations and Stellar Collapse Fuller, G. M. ; Mayle, R. W. Wilson, J. Schramm, D. N. The Mikheyev-Smirnov-Wolfenstein mechanism for resonant amplification of neutrino oscillations is shown to occur in collapsing presupernova stellar cores if there exist massive unstable neutrinos which mix with the electron neutrino. relevant mass range 200 eV...
We present a formulation of the quantum kinetic equations (QKEs), which govern evolution neutrino flavor at high density and temperature. Here, structure QKEs is derived from ground up, using fundamental interactions field theory. show that resulting describe coherent with an effective mass when inelastic scattering negligible. The also contain collision term. This term can reduce to in Boltzmann equation dominant masses matrices become diagonal interaction basis. find include motion for new...
We study the flavor evolution of a dense gas initially consisting pure monoenergetic ${\ensuremath{\nu}}_{e}$ and ${\overline{\ensuremath{\nu}}}_{e}$. Using adiabatic invariants special symmetry in such system we are able to calculate neutrino for cases with slowly decreasing number densities. These calculations give new insights into results recent large-scale numerical simulations transformation supernovae. For example, our reveal existence what term ``collective precession mode.'' Our...