W. Seligman
A5072884234- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- Particle Detector Development and Performance
- Atomic and Subatomic Physics Research
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Particle accelerators and beam dynamics
- Radiation Detection and Scintillator Technologies
- Muon and positron interactions and applications
- Superconducting Materials and Applications
- Particle Accelerators and Free-Electron Lasers
- Nuclear Physics and Applications
- Radiation Therapy and Dosimetry
- Spacecraft and Cryogenic Technologies
- Atmospheric Ozone and Climate
- Aerospace Engineering and Energy Systems
- Computational Physics and Python Applications
- Gamma-ray bursts and supernovae
- Quantum, superfluid, helium dynamics
- Nuclear physics research studies
- Laser-Plasma Interactions and Diagnostics
- Adversarial Robustness in Machine Learning
- Analytic Number Theory Research
Columbia University
2009-2024
Louisiana State University
2024
Colorado State University
2023-2024
University of Cincinnati
2023-2024
Osaka University
2024
Nankai University
2024
New Mexico State University
2024
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
2023
University of Chicago
2020-2022
University of California, Santa Barbara
2020-2022
We present an improved determination of the proton structure functions ${F}_{2}$ and ${\mathrm{xF}}_{3}$ from Columbia-Chicago-Fermilab-Rochester Collaboration $\ensuremath{\nu}\ensuremath{-}\mathrm{Fe}$ deep inelastic scattering experiment. Comparisons to corrected high-statistics charged-lepton results for NMC, E665, SLAC, BCDMS experiments indicate good agreement $x>0.1$ but some discrepancy at lower $x$. The ${Q}^{2}$ evolution both yields a value strong coupling constant scale mass $Z$...
A high-statistics study by the Columbia-Chicago-Fermilab-Rochester Collaboration of opposite-sign dimuon events induced neutrino-nucleon scattering at Fermilab Tevatron is presented. sample 5044 νμ and 1062 ν¯μ μ∓μ± with Pμ1≥9 GeV/c, Pμ2≥5 30≤Eν≤600 GeV, 〈Q2〉=22.2 GeV2/c2 observed. The data support slow-rescaling model charm production a value mc=1.31±0.24 GeV2/c2. first measurement Q2 dependence nucleon strange quark distribution xs(x) yield Cabibbo-Kobayashi-Maskawa matrix element...
We report on the extraction of structure functions F2 and DeltaxF(3) = xF(nu)(3)-xF(nu;)(3) from CCFR nu(mu)-Fe nu;(mu)-Fe differential cross sections. The is performed in a physics model-independent (PMI) way. This first measurement DeltaxF(3), which useful testing models heavy charm production, higher than current theoretical predictions. ratio values measured nu(mu) mu scattering agreement (within 5%) with predictions next-to-leading-order parton distribution using massive production...
The CCFR Collaboration presents a measurement of scaling violations the nonsinglet structure function and comparison to predictions perturbative QCD. value ${\mathrm{\ensuremath{\Lambda}}}_{\mathrm{QCD}}$, from evolution with ${\mathit{Q}}^{2}$>15 ${\mathrm{GeV}}^{2}$ in modified minimal-subtraction renormalization scheme, is found be 210\ifmmode\pm\else\textpm\fi{}28(stat)\ifmmode\pm\else\textpm\fi{}41(syst) MeV.
We extract a set of values for the Gross--Llewellyn Smith sum rule at different 4-momentum transfer squared ( ${Q}^{2}$), by combining revised CCFR neutrino data with from other deep-inelastic scattering experiments $1<{Q}^{2}<15{\mathrm{GeV}}^{2}{/c}^{2}$. A comparison order ${\ensuremath{\alpha}}_{s}^{3}$ theoretical predictions yields determination ${\ensuremath{\alpha}}_{s}$ scale $Z$-boson mass $0.114{\ifmmode\pm\else\textpm\fi{}}_{0.012}^{0.009}$. This measurement provides new and...
Limits on $\nu_\mu (\overline{\nu}_\mu) \to \nu_e (\overline{\nu}_e)$ oscillations based a statistical separation of $\nu_e N$ charged current interactions in the CCFR detector at Fermilab are presented. $\nu_e$ identified by difference longitudinal shower energy deposition pattern N \rightarrow eX$ versus \nu_\mu X$ interactions. Neutrino energies range from 30 to 600 GeV with mean 140 GeV, and $\nu_\mu$ flight lengths vary 0.9 km 1.4 km. The lowest 90% confidence upper limit $sin^2...
DAEdALUS, a Decay-At-rest Experiment for delta_CP studies At the Laboratory Underground Science, provides new approach to search CP violation in neutrino sector. The design utilizes low-cost, high-power proton accelerators under development commercial uses. These provide beams with energy up 52 MeV from pion and muon decay-at-rest. experiment searches aninu_mu antinu_e at short baselines corresponding atmospheric Delta m^2 region. will be detected, via inverse beta decay, 300 kton...
The techniques used to calibrate and monitor the energy response of CCFR (Lab E) iron-scintillator target calorimeter for a precision measurement shower energies are described. Measurements on hadrons, electrons, minimum ionizing muons (from range outs) presented. calorimeter's resolution hadrons electrons obtained using test beam with between 15 450 GeV.
We present limits on $ν_μ(\barν_μ)\toν_τ(\barν_τ)$ and $ν_μ(\barν_μ)\toν_e(\barν_e)$ oscillations based a study of inclusive $νN$ interactions performed using the CCFR massive coarse grained detector in FNAL Tevatron Quadrupole Triplet neutrino beam. The sensitivity to is from difference longitudinal energy deposition pattern $ν_μN$ versus $ν_τN$ or $ν_e N$ charged current interactions. $ν_μ$ energies ranged 30 500 GeV with mean 140 GeV. minimum maximum flight lengths are 0.9 km 1.4...
We report a precise measurement of the weak mixing angle from ratio neutral current to charged inclusive cross sections in deep-inelastic neutrino-nucleon scattering. The data were gathered at CCFR neutrino detector Fermilab quadrupole-triplet beam, with energies up 600 GeV. Using on-shell definition, ${\mathrm{sin}}^{2}$${\mathrm{\ensuremath{\theta}}}_{\mathit{W}}$==1-${\mathit{M}}_{\mathit{W}}^{2}$/${\mathit{M}}_{\mathit{Z}}^{2}$, we obtain...
A new structure function analysis of CCFR deep inelastic nu-N and scattering data is presented for previously unexplored kinematic regions down to Bjorken x = 0.0045 Q(2) 0.3 GeV(2). Comparisons charged lepton from NMC E665 experiments are made the behavior F(2)(nu)2 studied in limit Q(2)-->0.
This paper presents the physics case for a new high-energy, ultra-high statistics neutrino scattering experiment, NuSOnG (Neutrino Scattering on Glass). experiment uses Tevatron-based beam to obtain over an order of magnitude higher than presently available purely weak processes ν μ + e - → and . A sample Deep Inelastic events which is two orders larger past samples will also be obtained. As result, unique among present planned experiments its ability probe couplings Beyond Standard Model...
The relative absence of \ensuremath{\nu}${\mathrm{\ifmmode\bar\else\textasciimacron\fi{}}}_{\mathrm{\ensuremath{\mu}}}$-induced charged current events with respect to ${\ensuremath{\nu}}_{\mathrm{\ensuremath{\mu}}}$-induced at large (>0.45) and y (>0.70) enables us limit the right handed coupling weak current. Our data restrict...
Data from the CCFR E770 Neutrino Deep Inelastic Scattering (DIS) experiment at Fermilab contain events with large Bjorken x (x>0.7) and high momentum transfer (Q^2>50 (GeV/c)^2). A comparison of data a model based on no nuclear effects x, shows significant excess in data. Addition Fermi gas motion nucleons nucleus to does not explain excess. Adding higher tail due formation ``quasi-deuterons'' makes some improvement. An exponentially falling F_2 \propto e^-s(x-x_0) predicted by...
The Gamma-Ray and AntiMatter Survey (GRAMS) project is a proposed next-generation balloon/satellite mission targeting both MeV gamma-ray observations antimatter-based dark matter searches. A cost-effective, large-scale Liquid Argon Time Projection Chamber (LArTPC) detector technology will allow GRAMS to have significantly improved sensitivity gamma rays while extensively probing parameter space via antimatter measurements.
We measure the energy loss of high-energy muons (up to 1 TeV) from cosmic-ray incident on iron-scintillator calorimeter Chicago-Columbia-Fermilab-Rochester Collaboration (Lab E) neutrino detector at Fermilab. Measurements differential spectra in Fe and average dEdx are presented as functions muon compared against calculations. There is reasonable agreement between measurements calculations except region small losses (under a few GeV) for 1-TeV muons, where measurement about 30% lower than...