A5083667726- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Computational Physics and Python Applications
- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Black Holes and Theoretical Physics
- Nuclear physics research studies
- Distributed and Parallel Computing Systems
- Nuclear reactor physics and engineering
- Atomic and Molecular Physics
- Muon and positron interactions and applications
- Particle Accelerators and Free-Electron Lasers
- Radiation Effects in Electronics
- Nuclear Physics and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Atomic and Subatomic Physics Research
- advanced mathematical theories
- Astronomical and nuclear sciences
- Radio Astronomy Observations and Technology
- Superconducting Materials and Applications
Brookhaven National Laboratory
2014-2023
The University of Adelaide
2013-2020
The University of Tokyo
2017-2020
University of Birmingham
2019-2020
Stony Brook University
1994-2019
University of Utah
2016
The Abdus Salam International Centre for Theoretical Physics (ICTP)
2012-2016
Istituto Nazionale di Fisica Nucleare, Gruppo Collegato di Udine
2012-2016
University of Bologna
2015-2016
Istituto Nazionale di Fisica Nucleare, Sezione di Trieste
2014-2016
Proton–nucleus (p+A) collisions have long been recognized as a crucial component of the physics program with nuclear beams at high energies, in particular for their reference role to interpret and understand nucleus–nucleus data well potential elucidate partonic structure matter low parton fractional momenta (small-x). Here, we summarize main motivations that make proton–nucleus run decisive ingredient successful heavy-ion Large Hadron Collider (LHC) present unique scientific opportunities...
Event shapes for Au + collisions at 11.4 GeV/c per nucleon were studied over nearly the full solid angle with E877 apparatus. The analysis was performed by Fourier expansion of azimuthal distributions transverse energy (ET) measured in different pseudorapidity intervals. For semicentral a pronounced event anisotropy is identified clear forward-backward anticorrelation. In forward interval up to 9% ET directed component. signal decreases peripheral and very central collisions.Received 12 May...
Abstract Bursts of gamma ray showers have been observed in coincidence with downward propagating negative leaders lightning flashes by the Telescope Array Surface Detector (TASD). The TASD is a 700‐km 2 cosmic observatory located southwestern Utah, USA. In data collected between 2014 and 2016, correlated observations showing structure temporal development three shower‐producing were obtained 3‐D mapping array, electric field change measurements for an additional seven flashes, both cases...
The ATLAS detector has been designed for operation at CERN's Large Hadron Collider. includes a complex system of liquid argon calorimeters. This paper describes the architecture and implementation custom front end electronics developed readout
Collisions of $^{28}\mathrm{Si}$+Al, Cu, Pb at ${\mathit{E}}_{\mathrm{lab}}$/A=14.6 GeV were studied in a calorimetry-based experiment the BNL Alternating Gradient Synchrotron. Transverse-energy production was measured for pseudorapidities -0.50.8. Correlations with spectra and multiplicity neutrons protons emitted into forward 0.8\ifmmode^\circ\else\textdegree\fi{} cone demonstrate quantitatively large amount nuclear stopping observed these reactions. Calculations hadronic-fireball or...
The ATLAS detector has been designed for operation at CERN's Large Hadron Collider. includes a complex system of liquid argon calorimeters. electronics amplifying, shaping, sampling, pipelining, and digitizing the calorimeter signals is implemented on Front End Boards (FEBs). This paper describes design, implementation production FEBs presents measurement results from testing performed several stages during process.
This paper summarizes the radiation testing performed on Xilinx Kintex-7 FPGA in an effort to determine if can be used within ATLAS Liquid Argon (LAr) Calorimeter. The device was tested with wide-spectrum neutrons, protons, heavy-ions, and mixed high-energy hadron environments. results of these tests were estimate configuration ram block upset rate LAr. These estimations suggest that memory will at a 1.1 × 10−10 upsets/bit/s bram 9.06 10−11 upsets/bit/s. For Kintex 7K325 device, this...
We present the results from heavy quarks and quarkonia working group. This report gives benchmark quark quarkonium cross sections for $pp$ $pA$ collisions at LHC against which $AA$ rates can be compared in study of quark-gluon plasma. also provide an assessment theoretical uncertainties these benchmarks. then discuss some cold matter effects on production, including nuclear absorption, scattering by produced hadrons, energy loss medium. Hot that could reduce observed such as color screening...
We present a systematic study of transverse energy (${\mathit{E}}_{\mathit{T}}$) production in collisions 11.4A GeV/c Au and 14.6A Si ions with targets Al, Au, Pb. Comparison data for Au+Au Si+Al indicates that, the heavier system, there is an increase amount stopping which accompanied by decrease width ${\mathit{dE}}_{\mathit{T}}$/d\ensuremath{\eta} distribution. The ratio maximum ${\mathit{E}}_{\mathit{T}}$ observed two systems significantly greater than total available center mass frame.
We have measured cross sections for the synthesis of nuclei mass A≤4 in collisions 14.6A GeV/c 28Si with targets Pb, Cu, and Al. The data are at close to center-of-mass rapidities, unique their exploration centrality dependence nucleosynthesis. Simple coalescence models that were used study nucleosynthesis lower energies inadequate description our measurements. Our improved extract parameters related size interaction volume freeze-out.Received 2 March...
We present measurements of pion transverse momentum (pt) spectra in central Si-nucleus collisions the rapidity range 2.0 < y 5.0 for pt down to and including = 0. The data exhibit an enhanced yield at low compared what is expected a purely thermal spectral shape. This enhancement used determine Δ resonance abundance freeze-out. results are consistent with direct measurement by reconstruction proton-pion pairs imply temperature system freeze-out close 140 MeV.
Various pion and photon production mechanisms in high-energy nuclear collisions at RHIC LHC are discussed. Comparison with data is done whenever possible. The prospect of using electromagnetic probes to characterize quark-gluon plasma formation assessed...
Electronic components used in high energy physics experiments are subjected to a radiation background composed of hadrons, mesons and photons. These particles can induce permanent transient effects that affect the normal device operation. Ionizing dose displacement damage cause chronic which disable permanently. Transient or single event general recoverable with time intervals depend on nature failure. The magnitude these is technology dependent feature size being one key parameters. Analog...
The ATLAS detector has been built to study the reactions produced by Large Hadron Collider (LHC). includes a system of liquid argon calorimeters for energy measurements. electronics amplifying, shaping, sampling, pipelining, and digitizing calorimeter signals is implemented on set front-end electronic boards. boards are installed in crates mounted between calorimeters, where they will be subjected significant levels radiation during LHC operation. As result, all components used had an...
Timepix pixel detectors have been used to study the response of silicon hybrid fast neutrons from a pulsed neutron beam at WNR FP30R, 14 m long flight path, in Los Alamos Neutron Science Center. Neutrons with kinetic energies up 600 MeV were available. In order enhance conversion energetic charged particles, several converter foils and filters attached 300 μm thick sensor, i.e. polyethylene, polyethylene aluminum, 6LiF, 6LiF aluminum. The Time-of-Arrival mode has permitted application...