Results 111 to 120 of about 41,826 (280)

Quantum suppression of antihydrogen formation in positronium-antiproton scattering

open access: yesNature Communications, 2017
The interaction of antiprotons with low-energy positronium atoms is a fundamental three-body problem whose significance is its utility for formation of antihydrogen.
A. Kadyrov   +3 more
semanticscholar   +1 more source

New structures in the proton-antiproton system [PDF]

open access: yes, 2015
In the most recent measurements of the reaction $e^+e^- \rightarrow p\bar{p}$ by the BABAR collaboration, new structures have been found with unknown origin.
I. Lorenz, H. Hammer, U. Meissner
semanticscholar   +1 more source

Cylindrically Symmetric Diffusion Model for Relativistic Heavy‐Ion Collisions

open access: yesAnnalen der Physik, Volume 536, Issue 5, May 2024.
To account for particle production in relativistic heavy‐ion collisions at the Large Hadron Collider, a relativistic diffusion model with cylindrical symmetry is derived from nonequilibrium–statistical considerations. It propagates an initial state based on quantum chromodynamics in time toward a thermal equilibrium limit.
Johannes Hoelck, Georg Wolschin
wiley   +1 more source

Modeling of the Near-Earth Low-Energy Antiproton Fluxes

open access: yesAdvances in Astronomy, 2011
The local interstellar antiproton spectrum is simulated taking into account antineutron decay, (He,p) interaction, secondary and tertiary antiproton production, and the solar modulation in the “force field” approximation.
U. B. Jayanthi, A. A. Gusev
doaj   +1 more source

Precision spectroscopy of antiprotonic helium [PDF]

open access: yes, 2007
Antiprotonic helium, a neutral exotic three-body system consisting of a helium nucleus, an electron and an antiproton, is being studied at the Antiproton Decelerator of CERN by the ASAUCSA collaboration.
Widmann, Eberhard
core   +2 more sources

Beam Dynamics Studies and Design Optimisation of New Low Energy Antiproton Facilities [PDF]

open access: yes, 2016
Antiprotons, stored and cooled at low energies in a storage ring or at rest in traps, are highly desirable for the investigation of a large number of basic questions on fundamental interactions.
Hunt, James R.   +2 more
core   +2 more sources

SEARCH FOR POLARIZATION EFFECTS IN THE ANTIPROTON PRODUCTION PROCESS [PDF]

open access: yes, 2015
For the production of a polarized antiproton beam, various methods have been suggested including the possibility that antiprotons may be produced polarized which will be checked experimentally.
D. Grzonka   +23 more
semanticscholar   +1 more source

Extracting Kinetic Freeze‐Out Properties in High‐Energy Collisions Using a Multisource Thermal Model

open access: yesAdvances in High Energy Physics, Volume 2024, Issue 1, 2024.
We study the transverse momentum (pT) spectra of neutral pions and identified charged hadrons produced in proton–proton (pp), deuteron–gold (d–Au), and gold–gold (Au–Au) collisions at the center of mass energy sNN=200 GeV. The study is made in the framework of a multisource thermal model used in the partonic level.
Jia-Yu Chen   +4 more
wiley   +1 more source

Antihydrogen Formation via Antiproton Scattering with Excited Positronium.

open access: yesPhysical Review Letters, 2015
Utilizing the two-center convergent close-coupling method, we find a several order of magnitude enhancement in the formation of antihydrogen via antiproton scattering with positronium in an excited state over the ground state.
A. Kadyrov   +4 more
semanticscholar   +1 more source

New evaluation of the antiproton production cross section for cosmic ray studies [PDF]

open access: yes, 2014
Theoretical predictions for the cosmic antiproton spectrum currently fall short of the corresponding experimental level of accuracy. Among the main sources of uncertainty are the antiproton production cross sections in cosmic ray inelastic interactions ...
M. D. Mauro   +3 more
semanticscholar   +1 more source

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