A5101403837- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Computational Physics and Python Applications
- Neutrino Physics Research
- Black Holes and Theoretical Physics
- Particle Accelerators and Free-Electron Lasers
- Astrophysics and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Nuclear physics research studies
- Superconducting Materials and Applications
- Particle accelerators and beam dynamics
- Radiation Effects and Dosimetry
- Distributed and Parallel Computing Systems
- Algorithms and Data Compression
- Astronomical Observations and Instrumentation
- Radiation Effects in Electronics
- Advanced NMR Techniques and Applications
- Atomic and Subatomic Physics Research
- Air Quality Monitoring and Forecasting
- Advanced Queuing Theory Analysis
- Radioactive contamination and transfer
Stony Brook University
2013-2023
Cambodia-Oxford Medical Research Unit
2023
The University of Adelaide
2013-2017
Universitatea Națională de Știință și Tehnologie Politehnica București
2016
University of Oxford
2015-2016
University of Bergen
2016
Universidade Federal do Rio de Janeiro
2015
University of Birmingham
2015
Outcomes Research Consortium
2014
Cleveland Clinic
2014
A precise measurement of the atomic-mass dependence dimuon production induced by 800-GeV protons is reported. Over 450 000 muon pairs with mass M\ensuremath{\ge}4 GeV were recorded from targets $^{2}\mathrm{H}$, C, Ca, Fe, and W. The ratio yield per nucleon for nuclei versus R=${\mathit{Y}}_{\mathit{A}}$/${\mathit{Y}}_{2\mathit{H}}$, sensitive to modifications antiquark sea in nuclei. No nuclear this observed over range target-quark momentum fraction 0.1${\mathit{x}}_{\mathit{t}}$0.3. For...
The yield of J/\ensuremath{\psi} and \ensuremath{\psi}' vector-meson states has been measured for 800-GeV protons incident on deuterium, carbon, calcium, iron, tungsten targets. A depletion the per nucleon from heavy nuclei is observed both production. This exhibits a strong dependence ${\mathit{x}}_{\mathit{F}}$ ${\mathit{p}}_{\mathit{t}}$. Within experimental errors same \ensuremath{\psi}'.
Over the past decade, a large number of jet substructure observables have been proposed in literature, and explored at LHC experiments. Such attempt to utilize internal structure jets order distinguish those initiated by quarks, gluons, or boosted heavy objects, such as top quarks W bosons. This report, originating from motivated BOOST2013 workshop, presents original particle-level studies that aim improve our understanding relationships between observables, their complementarity, dependence...
The yields of the 1S and sum 2S 3S \ensuremath{\Upsilon} resonances have been measured for 800-GeV protons incident on targets $^{2}\mathrm{H}$, C, Ca, Fe, W. A significant nuclear dependence is seen in yield per nucleon which, within errors, same \ensuremath{\Upsilon}(1S) \ensuremath{\Upsilon}(2S+3D) states. large decrease relative from heavy nuclei found range ${\mathit{x}}_{\mathit{F}}$0. Significant also observed ${\mathit{p}}_{\mathit{t}}$ distribution. Differential cross sections...
R. L. McCarthy and A. MacLachlan, Trans. Faraday Soc., 1960, 56, 1187 DOI: 10.1039/TF9605601187
Although much attention has been given to the physics of a microwave glow discharge, substantially less information is available regarding chemical effects upon gas undergoing such excitation. We have studied 2450-Mc/sec discharge on several gases and made quantitative measurements few simple molecular systems, e.g., N2, H2, O2, air, CH4. A fundamental relationship found exist between yield in systems controllable variables electric field strength, contact time, pressure. Analytical...
Absolute cross sections as functions of kinematic variables are presented for the production muon pairs from 800 GeV proton bombardment $^{2}\mathrm{H}$. Drell-Yan (continuum) dimuons were recorded in mass regions 4.5\ensuremath{\le}${\mathit{M}}_{\mathrm{\ensuremath{\mu}}}^{+}$${\mathrm{\ensuremath{\mu}}}^{\mathrm{\ensuremath{-}}}$\ensuremath{\le}9 and ${\mathit{M}}_{\mathrm{\ensuremath{\mu}}}^{+}$${\mathrm{\ensuremath{\mu}}}^{\mathrm{\ensuremath{-}}}$\ensuremath{\ge}11 GeV, with an...
The first page of this article is displayed as the abstract.
Pulsed 6-Mev electrons from a Lineac have been used to initiate free radical reactions in the cyclohexane-oxygen system. The primary formed, cyclohexyl, is identified through EPR analysis of irradiated solid sample at —100°C. In liquid phase cyclohexyl-peroxy formed; its decay observed spectroscopically over period 10 msec, and second-order rate constants calculated. principal reaction involving disproportionation two radicals requires zero (<1 kcal/mole) activation energy. constant...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPulse Radiolysis of Aromatic CompoundsA. MacLachlan and R. L. McCarthyCite this: J. Am. Chem. Soc. 1962, 84, 13, 2519–2524Publication Date (Print):July 1, 1962Publication History Published online1 May 2002Published inissue 1 July 1962https://pubs.acs.org/doi/10.1021/ja00872a014https://doi.org/10.1021/ja00872a014research-articleACS PublicationsRequest reuse permissionsArticle Views134Altmetric-Citations24LEARN ABOUT THESE METRICSArticle Views are...
We report an analysis of the nuclear dependence yield Drell-Yan dimuons from 800 GeV/c proton bombardment 2H, C, Ca, Fe, and W targets. Employing a new formulation process in rest frame nucleus, this examines effect initial-state energy loss shadowing on nuclear-dependence ratios versus incident proton's momentum fraction dimuon effective mass. The resulting per unit path length is -dE/dz = 2.32+/-0.52+/-0.5 GeV/fm. This first observation nonzero partons traveling environment.
We present an analysis of 800-GeV proton-induced Drell-Yan production data from isoscalar targets $^{2}\mathrm{H}$ and C, W, which has a large neutron excess. The ratio cross sections per nucleon, R-${\mathrm{\ensuremath{\sigma}}}_{\mathrm{W}}$/${\mathrm{\ensuremath{\sigma}}}_{\mathrm{IS}}$, is sensitive to the difference between d\ifmmode\bar\else\textasciimacron\fi{}(x) u\ifmmode\bar\else\textasciimacron\fi{}(x) structure functions proton. find that R close unity in range...
A measurement of continuum dimuon production in proton-copper collisions at 800-GeV incident energy is presented. The dimuons observed this experiment cover the mass range from 6.5 to 18 GeV near y=0 proton-nucleon center-of-momentum frame. Scaling forms cross section for are compared with results other experiments context parton model and quantum chromodynamics. present limitations such scaling comparisons discussed.
Using a wire-spark-chamber deuteron spectrometer, we have measured the missing-mass (MM) spectrum up to \ensuremath{\sim} 1.5 GeV in reaction $\mathrm{pp}\ensuremath{\rightarrow}d+\mathrm{MM}$ for deutrons produced at 0\ifmmode^\circ\else\textdegree\fi{} laboratory and incident momenta of 3.8, 4.5, 6.3 $\frac{\mathrm{GeV}}{c}$. Production cross sections $\ensuremath{\pi}$ $\ensuremath{\rho}$ are reported. Evidence ${\ensuremath{\pi}}_{N}(980)$ production with mass 975...
A search for neutral penetrating particles has been made by use of an 800-GeV proton beam incident on the magnetized dump spectrometer Fermilab experiment 605. Limits mass and couplings such are presented. 1.8-MeV axion coupled only to ${e}^{+}{e}^{\ensuremath{-}}$ is ruled out.
We have measured the cross section for $p+p\ensuremath{\rightarrow}p+X$ ${{M}_{X}}^{2}$ up to a constant fraction of $s$. observe no rise $130<E<400$ GeV. The inelastic $0<{M}^{2}<0.06s$ is 2.50\ifmmode\pm\else\textpm\fi{}0.05 mb various values $s$ from 263 752 Ge${\mathrm{V}}^{2}$.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDetermination of Free Carbon in Atmospheric DustRobert McCarthy and C. MooreCite this: Anal. Chem. 1952, 24, 2, 411–412Publication Date (Print):February 18, 1952Publication History Published online1 May 2002Published inissue 18 February 1952https://doi.org/10.1021/ac60062a040RIGHTS & PERMISSIONSArticle Views26Altmetric-Citations10LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum full text article downloads since November 2008...
We have performed an experiment on $p\ensuremath{-}p$ inelastic scattering at National Accelerator Laboratory to study the reaction $p+p\ensuremath{\rightarrow}p+X$. cover range in $|t|$ from 0.019 0.17 ${(\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c})}^{2}$ by measuring low-energy recoiling protons. The $M_{X}^{}{}_{}{}^{2}$ measured is 0 60 Ge${\mathrm{V}}^{2}$. "diffractive" cross section determined be $3.2<\ensuremath{\sigma}<4.7$ mb. Unexpected behavior observed low for...
We have studied the interactions of 400-GeV/c protons with beryllium nuclei and observed hadrons produced at large transverse momenta (${p}_{\ensuremath{\perp}}$) back to near 90\ifmmode^\circ\else\textdegree\fi{} in proton-nucleon center-of-momentum system. When both exceed about 2.6 GeV/c, we observe that probability per single hadron observing a second high-${p}_{\ensuremath{\perp}}$ on opposite side approximately scales ratio two (${x}_{e}$ scaling). Quantum-number correlations between...