نتایج جستجو برای: antiproton
تعداد نتایج: 1381 فیلتر نتایج به سال:
Control of the radial profile of trapped antiproton clouds is critical to trapping antihydrogen. We report detailed measurements of the radial manipulation of antiproton clouds, including areal density compressions by factors as large as ten, achieved by manipulating spatially overlapped electron plasmas. We show detailed measurements of the near-axis antiproton radial profile, and its relation...
Abstract The efficiency of deflection high-energy negatively charged particles by a bent crystal using planar channeling and stochastic mechanism is compared. comparison carried out on the example antiprotons with kinetic energy from 1 to 14 GeV, which will be achievable accelerators Facility for Antiproton Ion Research. showed that both mechanisms make it possible deflect part antiproton beam ...
Spectroscopy of antiprotonic helium atoms and its contribution to the fundamental physical constants
Antiprotonic helium atom, a metastable neutral system consisting of an antiproton, an electron and a helium nucleus, was serendipitously discovered, and has been studied at CERN's antiproton decelerator facility. Its transition frequencies have recently been measured to nine digits of precision by laser spectroscopy. By comparing these experimental results with three-body QED calculations, the ...
— The new Facility for Antiproton and Ion Research (FAIR), under construction at the GSI laboratory at Darmstadt, in a few years will make available, among different types of beams, even antiproton beams with unique features. Through a High Energy Storage Ring (HESR) for antiprotons, an antiproton beam will be available in a momentum range from 1.5 to 15GeV/c, which will interact on a hydrogen ...
Antiproton production in Ni+Ni collisions at 1.85 GeV/nucleon is studied in the relativistic Vlasov-Uehling-Uhlenbeck model. The self-energies of the antiproton are determined from the nucleon self-energies by the G-parity transformation. Also, the 6nal-state interactions of the antiproton including both rescattering and annihilation are explicitly treated. With a soft nuclear equation of state...
Abstract The Facility for Antiproton and Ion Research (FAIR) in Darmstadt, Germany, provides unique possibilities a new generation of hadron-, nuclear- atomic physics experiments. future antiProton ANnihilations at DArmstadt (PANDA or $$\overline{\mathrm{P}}$$ P ¯ AND...
Antiproton production in Ni+Ni collisions at 1.85 GeV/nucleon is studied in the relativistic Vlasov-Uehling-Uhlenbeck model. The self-energies of the an-tiproton are determined from the nucleon self-energies by the G-parity transformation. Also, the final-state interactions of the antiproton including both rescattering and annihilation are explicitly treated. With a soft nuclear equation of sta...
We present a CDF measurement of diffractive dijet production in p̄p collisions at 1.96 TeV at the Fermilab Tevatron Collider using data from an integrated luminosity of ≈ 310 pb collected by triggering on a high transverse momentum jet in coincidence with a recoil antiproton detected in a roman pot spectrometer. We report final results for 4-momentum transfer squared t > −4 GeV, antiproton-momen...
The BASE collaboration investigates the fundamental properties of protons and antiprotons, such as charge-to-mass ratios and magnetic moments, using advanced cryogenic Penning trap systems. In recent years, we performed the most precise measurement of the magnetic moments of both the proton and the antiproton, and conducted the most precise comparison of the proton-to-antiproton charge-to-mass ...
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