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1.
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Limits on antiproton-nuclei annihilation cross sections at ∼125 keV
/ Aghai-Khozani, H (Munich, Max Planck Inst. Quantenopt.) ; Barna, D (Wigner RCP, Budapest ; CERN) ; Corradini, M (Brescia U. ; INFN, Pavia) ; De Salvador, D (Padua U. ; INFN, Legnaro) ; Hayano, R S (Tokyo U.) ; Hori, M (Munich, Max Planck Inst. Quantenopt.) ; Leali, M (Brescia U. ; INFN, Pavia) ; Lodi-Rizzini, E (Brescia U. ; INFN, Pavia) ; Mascagna, V (Brescia U. ; INFN, Pavia ; Insubria U., Como) ; Prest, M (Insubria U., Como ; INFN, Milan Bicocca) et al.
Some experimental limits on the annihilation cross sections $σ_{\textrm{ann}}$ of antiprotons on carbon, palladium, and platinum targets were determined at the previously unexplored kinetic energy region E≈125 keV. Information on $σ_{\textrm{ann}}$ at such low antiproton energies is important in understanding the dynamics of the annihilation process, and provides useful data for models that attempt to describe the matter-antimatter asymmetry in the universe by assuming the existence of islands of antimatter concentration..
2021 - 17 p.
- Published in : Nucl. Phys. A 1009 (2021) 122170
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2.
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Buffer-gas cooling of antiprotonic helium to 1.5 to 1.7 K, and antiproton-to–electron mass ratio
/ Hori, Masaki (Munich, Max Planck Inst. Quantenopt.) ; Aghai-Khozani, Hossein (Munich, Max Planck Inst. Quantenopt.) ; Sótér, Anna (Munich, Max Planck Inst. Quantenopt.) ; Barna, Daniel (Wigner RCP, Budapest) ; Dax, Andreas (Tokyo U.) ; Hayano, Ryugo (Tokyo U.) ; Kobayashi, Takumi (Tokyo U.) ; Murakami, Yohei (Tokyo U.) ; Todoroki, Koichi (Tokyo U.) ; Yamada, Hiroyuki (Tokyo U.) et al.
Charge, parity, and time reversal (CPT) symmetry implies that a particle and its antiparticle have the same mass. The antiproton-to-electron mass ratio Embedded Image can be precisely determined from the single-photon transition frequencies of antiprotonic helium. [...]
2016
- Published in : Science 354 (2016) 610-614
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3.
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Segmented scintillators with SiPM readout for measuring antiproton annihilations
/ Soter, Anna (Munich, Max Planck Inst. Quantenopt.) ; Todoroki, Koichi (Tokyo U.) ; Kobayashi, Takumi (Tokyo U.) ; Barna, D (Wigner RCP, Budapest ; CERN) ; Horváth, Dezsõ (Wigner RCP, Budapest) ; Hori, Masaki (Munich, Max Planck Inst. Quantenopt. ; Tokyo U.)
SISSA, 2015
- Published in : PoS TIPP2014 (2015) 286
Fulltext: PDF; External link: Published version from PoS
In : International Conference on Technology and Instrumentation in Particle Physics 2014, Amsterdam, Netherlands, 2 - 6 Jun 2014, pp.286
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4.
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Beam diagnostics for measurements of in-flight annihilation cross sections of antiprotons at 130 keV
/ Aghai-Khozani, Hossein (CERN ; Munich, Max Planck Inst. Quantenopt.) ; Barna, Daniel (Wigner RCP, Budapest ; Tokyo U.) ; Corradini, Maurizio (INFN, Brescia ; Brescia U.) ; Hayano, Ryugo (Tokyo U.) ; Hori, Masaki (Munich, Max Planck Inst. Quantenopt. ; Tokyo U.) ; Kobayashi, Takumi (Tokyo U.) ; Leali, Marco (INFN, Brescia ; Brescia U.) ; Lodi-Rizzini, Evandro (INFN, Brescia ; Brescia U.) ; Mascagna, Valerio (INFN, Brescia ; Brescia U.) ; Prest, Michela (INFN, Milan Bicocca ; Insubria U., Como) et al.
The ASACUSA (the Atomic Spectroscopy And Collisions Using Slow Antiprotons) collaboration of CERN is currently attempting to measure the antiproton-nucleus in-flight annihilation cross sections on thin target foils of C, Pd, and Pt at the kinetic energy of 130 keV. The low-energy antiprotons were provided by the Antiproton Decelerator of CERN and a radio-frequency quadrupole decelerator developed by the ASACUSA collaboration. [...]
2015 - 4 p.
- Published in : JPS Conf. Proc. 6 (2015) 030111
In : 2nd Conference on Advances in Radioactive Isotope Science, Tokyo, Japan, 1 - 6 Jun 2014, pp.030111
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5.
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First measurement of the antiproton-nucleus annihilation cross section at 125 keV
/ Aghai-Khozani, H (Munich, Max Planck Inst. Quantenopt.) ; Barna, D (CERN) ; Corradini, M (Brescia U. ; INFN, Brescia) ; De Salvador, D (Padua U. ; INFN, Legnaro) ; Hayano, R (Tokyo U.) ; Hori, M (Munich, Max Planck Inst. Quantenopt. ; Tokyo U.) ; Kobayashi, T (Tokyo U.) ; Leali, M (Brescia U. ; INFN, Brescia) ; Lodi-Rizzini, E (Brescia U. ; INFN, Brescia) ; Mascagna, V (Brescia U. ; INFN, Brescia) et al.
2015
- Published in : Hyperfine Interact. 234 (2015) 85-92
In : 5th International Conference on Exotic Atoms and Related Topics, Vienna, Austria, 15 - 19 Sep 2014, pp.85-92
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6.
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Experimental investigation of $\approx$ 130 keV kinetic energy antiprotons annihilation on nuclei
/ Aghai-Khozani, H (Munich, Max Planck Inst. Quantenopt. ; CERN) ; Barna, D (Budapest, RMKI ; Tokyo U.) ; Corradini, M (Brescia U. ; INFN, Brescia) ; Hayano, R (Tokyo U.) ; Hori, M (Munich, Max Planck Inst. Quantenopt. ; Tokyo U.) ; Kobayashi, T (Tokyo U.) ; Leali, M (Brescia U. ; INFN, Brescia) ; Lodi-Rizzini, E (Brescia U. ; INFN, Brescia) ; Mascagna, V (Brescia U. ; INFN, Brescia) ; Prest, M (Insubria U., Como ; INFN, Milan Bicocca) et al.
The study of the antiproton ( $\bar {p}$ ) annihilation cross section on nuclei at low energies (eV-MeV region) has implications for fundamental cosmology as well as for nuclear physics. Concerning the former, different models try to explain the matter/antimatter asymmetry in the universe assuming the existence of the so-called “islands” where antinucleon-nucleon annihilations occur in the border region (Cohen et al. [...]
2014 - 6 p.
- Published in : Hyperfine Interact. 229 (2014) 31-36
In : 11th International Conference on Low Energy Antiproton Physics, Uppsala, Sweden, 10 - 15 Jun 2013, pp.31-36
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7.
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Near-infrared laser spectroscopy of antiprotonic helium atoms
/ Kobayashi, T ; Barna, D ; Hayano, R S ; Murakami, Y ; Todoroki, K ; Yamada, H ; Dax, A ; Venturelli, L ; Zurlo, N ; Horvath, D et al.
2014 - 4 p.
- Published in : EPJ Web Conf. 66 (2014) 05010
Fulltext: PDF;
In : 25th International Nuclear Physics Conference, pp.05010
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8.
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Experimental results on antiproton-nuclei annihilation cross section at very low energies
/ Aghai-Khozani, H (Munich, Max Planck Inst. Quantenopt. ; CERN) ; Barna, D (Wigner RCP, Budapest ; Tokyo U.) ; Corradini, M (Brescia U. ; INFN, Brescia) ; Hayano, R (Tokyo U.) ; Hori, M (Munich, Max Planck Inst. Quantenopt. ; Tokyo U.) ; Kobayashi, T (Tokyo U.) ; Leali, M (Brescia U. ; INFN, Brescia) ; Lodi-Rizzini, E (Brescia U. ; INFN, Brescia) ; Mascagna, V (Brescia U.) ; Prest, M (Insubria U., Como ; INFN, Milan Bicocca) et al.
2014 - 4 p.
- Published in : EPJ Web Conf. 66 (2014) 09001
Fulltext: PDF;
In : 25th International Nuclear Physics Conference, pp.09001
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9.
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Segmented scintillation detectors with silicon photomultiplier readout for measuring antiproton annihilations
/ Sótér, A. (Munich, Max Planck Inst. Quantenopt.) ; Todoroki, K. (Tokyo U.) ; Kobayashi, T. (Tokyo U.) ; Barna, D. (Tokyo U. ; Wigner RCP, Budapest) ; Horváth, D. (Wigner RCP, Budapest) ; Hori, M. (Munich, Max Planck Inst. Quantenopt. ; Tokyo U.)
The Atomic Spectroscopy and Collisions Using Slow Antiprotons (ASACUSA) 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 superconducting radiofrequency Paul trap for antiprotons. A system of 541 cast and extruded scintillator bars were arranged in 11 detector modules which provided a spatial resolution of 17 mm. [...]
arXiv:1403.0451.-
2014 - 10 p.
- Published in : Rev. Sci. Instrum. 85 (2014) 023302
Fulltext: PDF; External link: Preprint
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10.
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Observation of the 1154.9 nm transition of antiprotonic helium
/ Kobayashi, Takumi (Tokyo U.) ; Barna, Daniel (Tokyo U. ; Wigner RCP, Budapest) ; Hayano, Ryugo (Tokyo U.) ; Murakami, Yohei (Tokyo U.) ; Todoroki, Koichi (Tokyo U.) ; Yamada, Hiroyuki (Tokyo U.) ; Dax, Andreas (PSI, Villigen) ; Venturelli, Luca (U. Brescia ; INFN, Brescia) ; Zurlo, Nicola (U. Brescia ; INFN, Brescia) ; Horvath, Dezso (Wigner RCP, Budapest ; Debrecen, Inst. Nucl. Res.) et al.
The resonance transition $(n,l)=(40,36)\to(41,35)$ of the antiprotonic helium ($\overline{\mathrm{p}}^{4}$He$^{+}$) isotope at a wavelength of 1154.9 nm was detected by laser spectroscopy. The population of $\overline{\mathrm{p}}^{4}$He$^{+}$ occupying the resonance parent state $(40,36)$ was found to decay at a rate of $0.45\pm0.04$ $\mu$s$^{-1}$, which agreed with the theoretical radiative rate of this state. [...]
CERN-PH-EP-2013-175.-
Geneva : CERN, 2013 - 9 p.
- Published in : J. Phys. B 46 (2013) 245004
Draft (restricted): PDF; Fulltext: PDF;
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