Results 71 to 80 of about 30,906 (248)

Compression of Antiproton Clouds for Antihydrogen Trapping

, 2008
Control of the radial profile of trapped antiproton clouds is critical to trapping antihydrogen. We report the first detailed measurements of the radial manipulation of antiproton clouds, including areal density compressions by factors as large as ten ...
A. Olin, A. Povilus, C. C. Bray, C. L. Cesar, D. M. Silveira, D. P. van der Werf, D. R. Gill, E. Butler, E. Sarid, F. Chen, F. Robicheaux, G. B. Andresen, H. Grote, H. A. Torii, J. Fajans, J. Fajans, J. S. Hangst, J. S. Wurtele, J. W. Storey, J. F. Ziegler, K. Olchanski, L. Kurchaninov, L. V. Jørgensen, M. C. Fujiwara, M. Charlton, M. E. Hayden, M. J. Jenkins, N. Kuroda, N. Madsen, P. D. Bowe, P. Nolan, P. Pusa, R. Funakoshi, R. Hydomako, R. I. Thompson, R. Lambo, R. S. Hayano, S. Chapman, S. Seif El Nasr, W. Bertsche, W. N. Hardy, Y. Yamazaki   +41 more
core   +1 more source

Heavy Quarkonium States With Baryonic Chemical Potential

Advances in High Energy Physics, Volume 2025, Issue 1, 2025.
In this work, we have studied the dissociation behavior of 1S and 2S states of quarkonium using quasiparticle approach where the Debye mass depends on baryonic chemical potential. The binding energies of the quarkonium states has been obtained by using quasiparticle Debye mass which further depends on temperature and baryonic chemical potential (μb ...
Siddhartha Solanki, Manohar Lal, Vineet Kumar Agotiya, Andrea Coccaro   +3 more
wiley   +1 more source

On the Square Speed of Sound in High‐Energy Collisions: Range of Values and How to Understand It

Advances in High Energy Physics, Volume 2025, Issue 1, 2025.
After reviewing the sound speeds in various forms and conditions of matter, we investigate the sound speed of hadronic matter that has decoupled from the hot and dense system formed during high‐energy collisions. We comprehensively consider factors such as energy loss of the incident beam, rapidity shift of leading nucleons, and the Landau hydrodynamic
Ting-Ting Duan, Fu-Hu Liu, Khusniddin K. Olimov, Xiao Yan Chew   +3 more
wiley   +1 more source

Antiproton Annihilations in Propane [PDF]

Physical Review, 1961
An experiment to study the $\overline{p}$ annihilation process at 1.05 Bev/c was performed with the Lawrence Radiation Laboratory 30-in. propane bubble chamber. It was observed that the $K$-meson production in annihilation events rises sharply with the increase in energy, namely from 4\ifmmode\pm\else\textpm\fi{}1% for annihilations at or near "rest ...
Goldhaber, Sulamith, Goldhaber, Gerson, Powell, Wilson M., Silberberg, Rein.   +3 more
openaire   +2 more sources

Quarks unter Hochdruck im Proton

Physik in unserer Zeit, Volume 55, Issue 6, Page 298-306, November 2024.
Schon vor etwa 90 Jahren haben Experimente gezeigt, dass das Proton kein punktförmiges Elementarteilchen ist, wie das Elektron, sondern eine innere Struktur aufweist. Dies war der Beginn der Protonstrukturforschung, die vor Kurzem mit der Messung des Drucks im Innern des Protons einen spannenden Höhepunkt erreicht hat.
Volker Burkert, Stefan Diehl, Peter Schweitzer   +2 more
wiley   +1 more source

CERN ELENA project progress report

EPJ Web of Conferences, 2015
The Extra Low Energy Antiproton ring (ELENA) is a CERN project aiming at constructing a 30 m circumference synchrotron to further decelerate antiprotons from the Antiproton Decelerator (AD) from 5.3 MeV to 100 keV.
Bartmann Wolfgang, Belochitskii Pavel, Breuker Horst, Butin François, Carli C., Eriksson Tommy, Oelert Walter, Maury Stephan, Pasinelli Sergio, Tranquille Gerard   +9 more
doaj   +2 more sources

Formation of antihydrogen beams from positron–antiproton interactions

New Journal of Physics, 2019
The formation of a beam of antihydrogen atoms when antiprotons pass through cold, dense positron plasmas is simulated for various plasma properties and antiproton injection energies.
S Jonsell, M Charlton
doaj   +1 more source

Cylindrically Symmetric Diffusion Model for Relativistic Heavy‐Ion Collisions

Annalen 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

On the possibility of extracting part of a beam of negatively charged particles from an accelerator using a bent crystal

European Physical Journal C: Particles and Fields, 2023
The efficiency of deflection of high-energy negatively charged particles by a bent crystal using planar channeling and stochastic deflection mechanism is compared.
I. V. Kyryllin, N. F. Shul’ga
doaj   +1 more source

Precision spectroscopy of antiprotonic helium [PDF]

, 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