Results 21 to 30 of about 41,826 (280)

Matter-antimatter rearrangements using the R-matrix method

open access: yesFrontiers in Physics, 2023
Antihydrogen atoms, H―, are now routinely created and can be stored for long enough to allow comparison with ordinary matter. A major goal of these efforts is to test potential physics beyond the Standard Model.
Elliott Kasoar   +3 more
doaj   +1 more source

Precision Measurements of the Fundamental Properties of the Proton and Antiproton [PDF]

open access: yesJournal of Physics: Conference Series, 2020
Precision measurements comparing the fundamental properties of conjugate particles and antiparticles constitute stringent tests of CPT invariance. We review recent precision measurements of the BASE collaboration, which improved the uncertainty of the ...
C. Smorra, A. Mooser
semanticscholar   +1 more source

Are antiprotons forever? [PDF]

open access: yesPhysics Letters A, 1996
12 pages, latex; 4 figures, uufiled. Slightly expanded discussion of expected energy dependence of annihilation cross section and rate, and of estimates of trap pressure, plus minor text ...
Michael Martin Nieto   +7 more
openaire   +3 more sources

Measurement of antiproton production from antihyperon decays in $${p} \textrm{He}$$ p He collisions at $$\sqrt{s_{\scriptscriptstyle \mathrm NN}} =110$$ s N N = 110 $$\,\text {Ge\hspace{-1.00006pt}V}$$ Ge V

open access: yesEuropean Physical Journal C: Particles and Fields, 2023
The interpretation of cosmic antiproton flux measurements from space-borne experiments is currently limited by the knowledge of the antiproton production cross-section in collisions between primary cosmic rays and the interstellar medium.
R. Aaij   +1015 more
doaj   +1 more source

A robust excess in the cosmic-ray antiproton spectrum: Implications for annihilating dark matter [PDF]

open access: yesPhysical Review D, 2019
An excess of $\ensuremath{\sim}10--20\text{ }\text{ }\mathrm{GeV}$ cosmic-ray antiprotons has been identified in the spectrum reported by the AMS-02 Collaboration.
I. Cholis, T. Linden, D. Hooper
semanticscholar   +1 more source

Antiproton extraction in the Fermilab antiproton accumulator [PDF]

open access: yesProceedings of International Conference on Particle Accelerators, 2002
The RF and other manipulations required to extract antiprotons from the accumulator core for collider operation are described. ESME simulations of the motion in longitudinal phase space are shown. Measurements of the emittances of the extracted antiprotons are presented.
M. Church, S. O'Day
openaire   +4 more sources

Heavy-Ion Collisions at FAIR-NICA Energies

open access: yesParticles, 2021
The “Facility for Antiproton and Ion Research” (FAIR) in Darmstadt, Germany, and the “Nuclotron-based Ion Collider Facility” (NICA) in Dubna, Russia, are two accelerator centers under construction.
Peter Senger
doaj   +1 more source

Extremophilic Microorganisms as a Source of Emerging Enzymes for the Food Industry: A Review. [PDF]

open access: yesFood Sci Nutr
Enzymes such as amylases, lipases, proteases, xylanases, laccases, pullulanase, chitinases, pectinases, esterases, isomerases, and dehydrogenases could be derived from extremophilic organisms like thermophiles, psychrophiles, acidophiles, alkaliphiles, and halophiles. These enzymes or extremozymes are applicable in the production of safe foods (such as
Ashaolu TJ   +4 more
europepmc   +2 more sources

All the fun of the FAIR: fundamental physics at the facility for antiproton and ion research [PDF]

open access: yesPhysica Scripta, 2019
The Facility for Antiproton and Ion Research (FAIR) will be the accelerator-based flagship research facility in many basic sciences and their applications in Europe for the coming decades.
M. Durante   +15 more
semanticscholar   +1 more source

Interaction of antiprotons with nuclei [PDF]

open access: yesNuclear Physics A, 2015
We report on self-consistent calculations of $\bar{p}$ quasi-bound states in selected nuclei performed within the relativistic mean-field (RMF) model employing $\bar{p}$ coupling constants tuned to reproduce $\bar{p}$-atom data. We confirmed considerable polarization of the nuclear core induced by the antiproton.
Jiří Mareš, Jaroslava Hrtánková
openaire   +9 more sources

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