A5015521189- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- Superconducting Materials and Applications
- Particle Accelerators and Free-Electron Lasers
- Neutrino Physics Research
- Particle accelerators and beam dynamics
- Astrophysics and Cosmic Phenomena
- Particle Detector Development and Performance
- Nuclear physics research studies
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Cosmology and Gravitation Theories
- Nuclear Physics and Applications
- Quantum optics and atomic interactions
- Atomic and Molecular Physics
- Computational Physics and Python Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Planetary Science and Exploration
- Black Holes and Theoretical Physics
- Algorithms and Data Compression
- Quantum, superfluid, helium dynamics
- Distributed and Parallel Computing Systems
- X-ray Spectroscopy and Fluorescence Analysis
Fermi National Accelerator Laboratory
2004-2024
All India Institute of Medical Sciences Bhubaneswar
2024
Siddhartha Medical College
2023-2024
Medanta The Medicity
2024
University of Birmingham
2024
Autonomous Healthcare
2023
King George's Medical University
2023
Homi Bhabha National Institute
2018-2019
Raja Ramanna Centre for Advanced Technology
2018-2019
Fermi Research Alliance
2002-2004
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}'.
Data obtained by the associated production of \ensuremath{\Lambda} hypernuclei through (${\mathrm{\ensuremath{\pi}}}^{+}$,${\mathit{K}}^{+}$) reaction are presented for a wide range mass numbers. The special features which make this useful pointed out. is shown to be an excellent probe single-particle states, as demonstrated excitation deeply bound states interpreted weak coupling neutron-hole core. binding energies and ground-state cross sections...
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...
The nuclear dependence for 800 GeV/c proton production of neutron D mesons has been measured near ${\mathit{x}}_{\mathit{F}}$=0 in Experiment 789 at Fermilab. from beryllium and gold targets were detected with a pair spectrometer silicon vertex detector via their decay D\ensuremath{\rightarrow}K\ensuremath{\pi}. No is found, \ensuremath{\alpha}=1.02\ifmmode\pm\else\textpm\fi{}0.03\ifmmode\pm\else\textpm\fi{}0.02. differential cross section, d\ensuremath{\sigma}/${\mathit{dx}}_{\mathit{F}}$,...
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...
With a data sample containing 1.1×105 J/ψ→μ+μ− decays reconstructed with 16 MeV/c2 rms mass resolution, we have measured the differential cross sections versus Feynman-x, rapidity, and pT for production of J/ψ ψ' in 800 GeV/c p-Au collisions. Our results are compared leading-order QCD predictions previous measurements. While shapes qualitative agreement predictions, magnitudes disagree by factors 7 (J/ψ) 25 (ψ'). Assuming an appropriate form regions not derive total section...
Using a silicon-microstrip detector array to identify secondary vertices, we have observed b→J/ψ→μ+μ− decays in 800GeV/c proton-gold interactions. The doubly differential cross section for J/ψ mesons originating from b-quark decays, assuming linear dependence on nucleon number, is d2σ/dxFdpT2=107±28±19[pb/(GeV/c)2]/nucleon at xF=0.05 and pT=1GeV/c. This measurement compared next-to-leading-order QCD predictions. integrated production section, obtained by extrapolation over all xF pT,...
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...
Quantum science and technology devices exploiting collective spins in thermal gases are extremely appealing due to their simplicity robustness. This comes at the cost of dealing with random motion atoms which is usually an uncontrolled source decoherence noise. There however conditions, for example, when diffusing a buffer gas, where can occupy discrete set stable spatial modes. Diffusive modes be extended or localized, have different magnetic properties depending on boundary react...
The differential cross sections dσ/dxF for J/ψ produced inclusively in 800 GeV/c p-Cu and p-Be collisions have been measured the kinematic range 0.30≤xF≤0.95 through decay mode J/ψ→μ+μ−. They are compared with predictions of semilocal duality model several sets parton density functions. No evidence a suggested intrinsic charm contribution to section is observed. ratio Cu Be targets confirms suppression production heavy nuclei at large xF.Received 1 November...
The reaction ${\ensuremath{\pi}}^{\mathrm{\ensuremath{-}}}$${+}^{3}$He\ensuremath{\rightarrow}\ensuremath{\eta}+t has been observed by detecting \ensuremath{\eta}\ensuremath{\rightarrow}2\ensuremath{\gamma} decays. forward-angle cross sections vary from \ensuremath{\sim}100 \ensuremath{\mu}b/sr at 680 MeV/c to \ensuremath{\sim}2 590 MeV/c. Distorted-wave impulse-approximation calculations reproduce the shape but underestimate magnitude of section. These are approximately 100 times larger...
Introduction Pregnancy is an altered immunological state and not necessarily immune-compromised state. These immune changes subject pregnant women to increased susceptibility infection. During the coronavirus disease 2019 (COVID-19) pandemic, were more susceptible serious illness for reasons other than their response. The purpose of this study was compare feto-maternal outcome (morbidity mortality) in relation pre-existing maternal co-morbidities, severe acute respiratory syndrome 2...
A multi-MW proton facility, Project X has been proposed and is currently under development at Fermilab. As part of this program, we are constructing a prototype the front end linac The construction successful operations facility will validate concept for end, thereby minimizing primary technical risk element within Project. Injector Experiment (PXIE) can be constructed over period FY12-16 include an H- ion source, CW 2.1-MeV RFQ two SC cryomodules providing up to 30 MeV energy gain average...
We read with great interest the study by Ko et al.,1 comparing diagnostic outcomes according to puncture sites in endoscopic ultrasound (EUS)-guided fine needle biopsy (FNB) for pancreatic lesions >3 cm. Sampling from center and periphery of showed equivalent accuracy detecting malignancy. However, when samples both locations were combined, yield was higher than either alone. Although adds currently limited literature on this topic, a few issues need be addressed. First, punctured,...
The electromagnetically induced transparency (EIT) observations in two $\Lambda$-systems of $^{87}Rb$ atom, $|5^{2}S_{1/2} F=1\rangle \rightarrow |5^{2}P_{3/2} F'=1\rangle \leftarrow |5^{2}S_{1/2} F=2\rangle$ and F'=2\rangle F=2\rangle$, have been investigated detail the results are found consistent with our proposed theoretical models. second $\Lambda$-system provides EIT signal higher magnitude than first system, both absence presence an applied magnetic field. observed steeper slope field...
We present new data for the \ensuremath{\gamma}p\ensuremath{\rightarrow}\ensuremath{\eta}p reaction at average photon energies of 729 and 753 MeV. The is believed to be dominated by intermediate states ${\mathit{N}}^{\mathrm{*}}$ resonances should an excellent way study internal structure baryon states. Previously published were consistent with a dominance ${\mathit{S}}_{11}$(1535)${\mathit{N}}^{\mathrm{*}}$ resonance in mechanism. show deviations from this picture first time.
The nuclear dependence for 800 GeV/c proton production of J/ψ’s has been measured near xF=0. $J/ psi—’s produced from beryllium, carbon, and tungsten targets were detected with the Fermilab E789 pair spectrometer. These data extend results E772 down to range xF=-0.1 0.1 indicate a gradually increasing suppression as xF falls below zero.Received 17 March 1995DOI:https://doi.org/10.1103/PhysRevD.52.4251©1995 American Physical Society