Results 61 to 70 of about 41,826 (280)
AMS-02 antiprotons and dark matter: Trimmed hints and robust bounds
SciPost Physics, 2022 Based on 4 yr AMS-02 antiproton data, we present bounds on the dark matter (DM) annihilation cross section vs. mass for some representative final state channels.
Francesca Calore, Marco Cirelli, Laurent Derome, Yoann Genolini, David Maurin, Pierre Salati, Pasquale D. Serpico
doaj +1 more source
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.
M Brouet +29 more
openaire +3 more sources
Interpretation of the cosmic ray positron and antiproton fluxes [PDF]
, 2016 The spectral shape of cosmic ray positrons and antiprotons has been accurately measured in the broad kinetic energy range 1-350 GeV. In the higher part of this range (E > 30 GeV) the e+ and pbar are both well described by power laws with spectral indices
P. Lipari
semanticscholar +1 more source
A parts-per-billion measurement of the antiproton magnetic moment
Nature, 2017 Precise comparisons of the fundamental properties of matter–antimatter conjugates provide sensitive tests of charge–parity–time (CPT) invariance, which is an important symmetry that rests on basic assumptions of the standard model of particle physics ...
C. Smorra +16 more
semanticscholar +1 more source
NEW CALCULATION OF ANTIPROTON PRODUCTION BY COSMIC RAY PROTONS AND NUCLEI [PDF]
Astrophysical Journal, 2015 A dramatic increase in the accuracy and statistics of space-borne cosmic ray (CR) measurements has yielded several breakthroughs over the last several years. The most puzzling is the rise in the positron fraction above ∼10 GeV over the predictions of the
M. Kachelrieß +2 more
semanticscholar +1 more source
Prospects for low-energy antiproton physics at Fermilab [PDF]
, 2001 Fermilab has long had the world's most intense antiproton source, but the opportunities for medium-energy antiproton physics have been limited, and those for low-energy antiproton physics nonexistent.
Kaplan, Daniel M.
core +4 more sources
Prescriptions on antiproton cross section data for precise theoretical antiproton flux predictions [PDF]
, 2017 After the breakthrough from the satellite-borne PAMELA detector, the flux of cosmic-ray (CR) antiprotons has been provided with unprecedented accuracy by AMS-02 on the International Space Station. Its data spans an energy range from below 1 GeV up to 400
F. Donato, M. Korsmeier, M. D. Mauro
semanticscholar +1 more source
Precision laser spectroscopy experiments on antiprotonic helium
EPJ Web of Conferences, 2018 At CERN‘s Antiproton Decelerator (AD) facility, the Atomic Spectroscopyand Collisions Using Slow Antiprotons (ASACUSA) collaboration is carrying out precise laser spectroscopy experiments on antiprotonic helium (p̅He+ ≡ p̅+He2++e−) atoms.
Hori Masaki
doaj +1 more source
Dark Matter Search in Space: Combined Analysis of Cosmic-Ray Antiproton-to-proton Flux Ratio and Positron Flux Measured by AMS-02 [PDF]
, 2017 Dark matter searches in space have been carried out for many years. Measurements of cosmic-ray (CR) photons, charged antiparticles, and neutrinos are useful tools for dark matter indirect searches.
Jie Feng, Hong-Hao Zhang
semanticscholar +1 more source
Coulomb corrections to low energy antiproton annihilation cross sections on protons and nuclei [PDF]
, 1999 We calculate, in a systematic way, the enhancement effect on antiproton-proton and antiproton-nucleus annihilation cross sections at low energy due to the initial state electrostatic interaction between the projectile and the target nucleus.
A. Benedettini +15 more
core +2 more sources