Results 51 to 60 of about 30,906 (248)
Dark matter or correlated errors: Systematics of the AMS-02 antiproton excess
Physical Review Research, 2020 Several studies have pointed out an excess in the AMS-02 antiproton spectrum at rigidities of 10–20 GV. Its spectral properties were found to be consistent with a dark-matter particle of mass 50–100 GeV which annihilates hadronically at roughly the ...
Jan Heisig +2 more
doaj +1 more source
The antinucleon-nucleon quasi-bound states: J/psi and atomic evidence
, 2005 The measurements of J/psi decays into photon, proton and antiproton show a strong enhancement at the proton-antiproton threshold not seen in the decays into neutral pion, proton and antiproton. What is the nature of this enhancement?
Loiseau, B., Wycech, S.
core +3 more sources
Improved limit on the directly measured antiproton lifetime
New Journal of Physics, 2017 Continuous monitoring of a cloud of antiprotons stored in a Penning trap for 405 days enables us to set an improved limit on the directly measured antiproton lifetime.
S Sellner +17 more
doaj +1 more source
Extended Glauber Model of Antiproton-Nucleus Annihilation for All Energies and Mass Numbers
, 2014 Previous analytical formulas in the Glauber model for high-energy nucleus-nucleus collisions developed by Wong are utilized and extended to study antiproton-nucleus annihilations for both high and low energies, after taking into account the effects of ...
Lee, Teck-Ghee, Wong, Cheuk-Yin
core +1 more source
Beam Dynamics Studies and Design Optimisation of New Low Energy Antiproton Facilities [PDF]
, 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
The Antiproton Decelerator: AD [PDF]
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1997 Abstract In view of a possible future programme of physics with low-energy antiprotons, a simplified scheme for the provision of antiprotons at 100 MeV/c has been studied. It uses the present target area and the modified Antiproton Collector (AC) in its present location. In this report the modifications and the operation are discussed.
S. Baird +29 more
openaire +1 more source
Event-by-event antideuteron multiplicity fluctuation in Pb+Pb collisions at sNN=5.02 TeV
Physics Letters B, 2023 Using the nucleon coalescence model based on kinetic freeze-out nucleons from the hybrid model of MUSIC hydrodynamics and UrQMD hadronic transport model, we study the production of antideuteron and its event-by-event fluctuation in Pb+Pb collisions at ...
Kai-Jia Sun, Che Ming Ko
doaj +1 more source
Antiproton-proton partial-wave analysis below 925 MeV/c
, 1994 A partial-wave analysis of all antiproton-proton scattering data below 925 MeV/c antiproton laboratory momentum is presented. The method used is adapted from the Nijmegen phase-shift analyses of pp and np scattering data.
de Swart, J. J. +2 more
core +1 more source
PERSPECTIVES FOR POLARIZED ANTIPROTONS
International Journal of Modern Physics E, 2009 In the framework of the FAIR project the PAX Collaboration has suggested new experiments using polarized protons and antiprotons. In order to provide polarized antiprotons, the proposed mechanisms for the production of a polarized stored have to be investigated.
LENISA, Paolo, F. Rathmann
openaire +3 more sources
AMS-02 antiprotons reloaded [PDF]
Journal of Cosmology and Astroparticle Physics, 2015 The AMS-02 collaboration has released preliminary data on the antiproton fraction in cosmic rays. The surprisingly hard antiproton spectrum at high rigidity has triggered speculations about a possible primary antiproton component originating from dark matter annihilations.
Kappl, Rolf +2 more
openaire +2 more sources