Results 121 to 130 of about 41,826 (280)

PAMELA results on the cosmic-ray antiproton flux from 60 MeV to 180 GeV in kinetic energy. [PDF]

Physical Review Letters, 2010
The satellite-borne experiment PAMELA has been used to make a new measurement of the cosmic-ray antiproton flux and the antiproton-to-proton flux ratio which extends previously published measurements down to 60 MeV and up to 180 GeV in kinetic energy ...
O. Adriani, G. Barbarino, G. Bazilevskaya, R. Bellotti, M. Boezio, É. Bogomolov, L. Bonechi, M. Bongi, V. Bonvicini, S. Borisov, S. Bottai, A. Bruno, F. Cafagna, D. Campana, R. Carbone, P. Carlson, M. Casolino, G. Castellini, L. Consiglio, M. P. Pascale, C. Santis, N. Simone, V. Felice, A. Galper, W. Gillard, L. Grishantseva, P. Hofverberg, G. Jerse, A. Karelin, S. Koldashov, S. Krutkov, A. Kvashnin, A. Leonov, V. Malvezzi, L. Marcelli, A. Mayorov, W. Menn, V. Mikhailov, E. Mocchiutti, A. Monaco, N. Mori, N. Nikonov, G. Osteria, P. Papini, M. Pearce, P. Picozza, C. Pizzolotto, M. Ricci, S. Ricciarini, L. Rossetto, M. Simon, R. Sparvoli, P. Spillantini, Y. Stozhkov, A. Vacchi, E. Vannuccini, G. Vasilyev, S. Voronov, Juan Wu, Y. Yurkin, G. Zampa, N. Zampa, V. Zverev   +62 more
semanticscholar   +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

Antiproton production in Ni+Ni collisions at 1.85 GeV/nucleon [PDF]

, 1994
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 final-
Ko, C. M., Li, G. Q.
core   +3 more sources

Calculation of antihydrogen formation via antiproton scattering with excited positronium

, 2016
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C. M. Rawlins, A. Kadyrov, A. Stelbovics, I. Bray, M. Charlton   +4 more
semanticscholar   +1 more source

What does the PAMELA antiproton spectrum tell us about dark matter? [PDF]

, 2014
Measurements of the cosmic ray antiproton spectrum can be used to search for contributions from annihilating dark matter and to constrain the dark matter annihilation cross section.
D. Hooper, T. Linden, P. Mertsch
semanticscholar   +1 more source

Segmented scintillation detectors with silicon photomultiplier readout for measuring antiproton annihilations. [PDF]

Review of Scientific Instruments, 2014
The Atomic Spectroscopy and Collisions Using Slow Antiprotons experiment at the Antiproton Decelerator (AD) facility of CERN constructed segmented scintillators to detect and track the charged pions which emerge from antiproton annihilations in a future ...
A. Soter, K. Todoroki, Takumi Kobayashi, D. Barna, D. Horvath, M. Hori   +5 more
semanticscholar   +1 more source

Experimental technique for antiproton-nucleus annihilation cross section measurements at low energy

EPJ Web of Conferences, 2018
The interaction of very low energy antiprotons (ps) and antineutrons (ns) with nuclei is interesting for its influence on both fundamental cosmology and nuclear physics. Measuring the annihilation cross section of antimatter on matter can help in solving
Aghai-Khozani H., Corradini M., Hayano R., Hori M., Leali M., Lodi-Rizzini E., Mascagna V., Murakami Y., Prest M., Solazzi L., Vallazza E., Venturelli L., Yamada H.   +12 more
doaj   +1 more source

Production of antihydrogen atoms by 6 keV antiprotons through a positronium cloud

European Physical Journal C: Particles and Fields, 2023
We report on the first production of an antihydrogen beam by charge exchange of 6.1 keV antiprotons with a cloud of positronium in the GBAR experiment at CERN.
P. Adrich, P. Blumer, G. Caratsch, M. Chung, P. Cladé, P. Comini, P. Crivelli, O. Dalkarov, P. Debu, A. Douillet, D. Drapier, P. Froelich, N. Garroum, S. Guellati-Khelifa, J. Guyomard, P.-A. Hervieux, L. Hilico, P. Indelicato, S. Jonsell, J.-P. Karr, B. Kim, S. Kim, E.-S. Kim, Y. J. Ko, T. Kosinski, N. Kuroda, B. M. Latacz, B. Lee, H. Lee, J. Lee, E. Lim, L. Liszkay, D. Lunney, G. Manfredi, B. Mansoulié, M. Matusiak, V. Nesvizhevsky, F. Nez, S. Niang, B. Ohayon, K. Park, N. Paul, P. Pérez, C. Regenfus, S. Reynaud, C. Roumegou, J.-Y. Roussé, Y. Sacquin, G. Sadowski, J. Sarkisyan, M. Sato, F. Schmidt-Kaler, M. Staszczak, K. Szymczyk, T. A. Tanaka, B. Tuchming, B. Vallage, A. Voronin, D. P. van der Werf, A. Welker, D. Won, S. Wronka, Y. Yamazaki, K.-H. Yoo, P. Yzombard   +64 more
doaj   +1 more source

Wino Dark Matter in light of the AMS-02 2015 Data [PDF]

, 2015
The AMS-02 collaboration has recently reported the antiproton to proton ratio with improved accuracy. In view of uncertainties of the production and the propagation of the cosmic rays, the observed ratio is still consistent with the secondary ...
Ibe, Masahiro, Matsumoto, Shigeki, Shirai, Satoshi, Yanagida, Tsutomu T.   +3 more
core   +1 more source

Simulation of AntiMatter–Matter Interactions in Geant4

EPJ Web of Conferences, 2018
Cross sections of antiproton and antinucleus interactions with nuclei are calculated using stochastic averaging method. A new implementation of the Quark-Gluon-String Model (QGSM) is proposed for simulation of multi-particle production in antinucleus ...
Galoyan Aida, Uzhinsky Vladimir, Ribon Alberto   +2 more
doaj   +1 more source