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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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Measurement of the antiproton–nucleus annihilation cross-section at low energy
/ Aghai-Khozani, H (Munich, Max Planck Inst. Quantenopt.) ; Bianconi, A (U. Brescia ; INFN, Pavia) ; Corradini, M (U. Brescia ; INFN, Pavia) ; Hayano, R (Tokyo U.) ; Hori, M (Munich, Max Planck Inst. Quantenopt. ; Tokyo U.) ; Leali, M (U. Brescia ; INFN, Pavia) ; Lodi Rizzini, E (U. Brescia ; INFN, Pavia) ; Mascagna, V (U. Brescia ; INFN, Pavia) ; Murakami, Y (Tokyo U.) ; Prest, M (INFN, Milan Bicocca ; Insubria U., Como) et al.
Systematic measurements of the annihilation cross sections of low energy antinucleons were performed at CERN in the 80's and 90's. However the antiproton data on medium-heavy and heavy nuclear targets are scarce. [...]
2018 - 13 p.
- Published in : Nucl. Phys. A 970 (2018) 366-378
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3.
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Coupled channel analysis of $\pi^+ \pi^ -\pi^0$, $K^+ K^- \pi^0$ and $K^{\pm} K^0_S \pi^{\mp}$ from $\bar p p$ annihilation at rest in hydrogen targets at three densities
/ Bargiotti, M (Bologna U. ; INFN, Bologna) ; Bertin, A (Bologna U. ; INFN, Bologna) ; Bruschi, M (Bologna U. ; INFN, Bologna) ; Capponi, M (Bologna U. ; INFN, Bologna) ; De Castro, S (Bologna U. ; INFN, Bologna) ; Fabbri, L (Bologna U. ; INFN, Bologna) ; Faccioli, P (Bologna U. ; INFN, Bologna) ; Galli, D (Bologna U. ; INFN, Bologna) ; Giacobbe, B (Bologna U. ; INFN, Bologna) ; Marconi, U (Bologna U. ; INFN, Bologna) et al.
/OBELIX
The $\pi^+ \pi^ -\pi^0$, $K^+ K^- \pi^0$ and $K^\pm K^0 \pi^\mp$ final states produced by $\bar p p$ annihilation at rest at three different hydrogen target densities have been analyzed in the frame of a coupled channel analysis together with $\pi \pi$, $\pi K$ and $K \bar K$ scattering data. The percentages of the different partial waves, the branching ratios and the parameters (masses, widths, $\pi \pi$ and $K \bar K$ partial widths) of all the involved resonances ($J^P = 0^+, 1^-, 2^+$) have been measured. [...]
2002 - 18 p.
- Published in : Eur. Phys. J. C 26 (2003) 371-388
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4.
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Experimental Apparatus for Antiproton-Nucleus Annihilation Cross Section Measurements at Low Energy
/ Aghai-Kozani, H (Munich, Max Planck Inst. Quantenopt.) ; Corradini, M (INFN, Pavia ; Pavia U.) ; Hayano, R (Tokyo U.) ; Hori, M (Munich, Max Planck Inst. Quantenopt.) ; Leali, M (INFN, Pavia ; Pavia U.) ; Lodi-Rizzini, E (INFN, Pavia ; Pavia U.) ; Mascagna, V (INFN, Pavia ; Pavia U.) ; Murakami, Y (Tokyo U.) ; Prest, M (INFN, Milan Bicocca ; Insubria U., Como) ; Solazzi, L (INFN, Pavia ; Pavia U.) et al.
The antiproton annihilation cross section at 5.3 MeV of kinetic energy on different nuclei (Ni, Sn, Pt) has been recently measured by the ASACUSA Collaboration at the CERN Antiproton Decelerator. A new experiment with a different apparatus has been performed on a carbon target in order to get a more precise measurement for a stringent comparison with the antineutron data. [...]
2017 - 6 p.
- Published in : JPS Conf. Proc. 18 (2017) 011037
External link: Fulltext
In : 12th International Conference on Low Energy Antiproton Physics, Kanazawa, Japan, 6 - 11 Mar 2016, pp.011037
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5.
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Recent Results on the Antiproton-Nucleus Annihilation Cross Section at Low Energy
/ Aghai-Khozani, H ; Corradini, M ; Hayano, R ; Hori, M ; Leali, M ; Lodi-Rizzini, E ; Mascagna, V ; Murakami, Y ; Prest, M ; Vallazza, E et al.
Measurements of the antinucleon-nuclei annihilation cross section (σ_ann) at very low energies have been performed at CERN during the 80’s and 90’s with the LEAR facility and more recently with the Antiproton Decelerator. One of the unexplained results is the behaviour of the antineutron data on several nuclei (C, Al, Cu, Ag, Sn, Pb) at momenta below 180 MeV/c [1], where the σ_ann values, as a function of energy, have a steep rise typical of low-energy charged projectiles [2]. [...]
2017 - 6 p.
- Published in : JPS Conf. Proc. 18 (2017) 011036
External link: Fulltext
In : 12th International Conference on Low Energy Antiproton Physics, Kanazawa, Japan, 6 - 11 Mar 2016, pp.011036
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6.
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New results of the antiproton-carbon annihilation cross section measurement at low energies
/ Aghai–Khozani, H (Munich, Max Planck Inst. Quantenopt.) ; Corradini, M (Brescia U. ; INFN, Pavia) ; Hayano, R (Tokyo U.) ; Hori, M (Munich, Max Planck Inst. Quantenopt. ; Tokyo U.) ; Leali, M (Brescia U. ; INFN, Pavia) ; Lodi–Rizzini, E (Brescia U. ; INFN, Pavia) ; Mascagna, V (Brescia U. ; INFN, Pavia) ; Murakami, Y (Tokyo U.) ; Prest, M (Insubria U., Varese ; INFN, Milan Bicocca) ; Solazzi, L (Brescia U. ; INFN, Pavia) et al.
The antinucleon-nuclei annihilation cross section at very low energy has been measured at the LEAR facility (CERN) during the 80's and 90's and recently at the Antiproton Decelerator. The results have raised some interesting questions that still need answers. [...]
2016 - 3 p.
- Published in : EPJ Web Conf. 130 (2016) 07014
Fulltext: PDF;
In : 14th International Workshop on Meson Production, Properties and Interaction, Krakow, Poland, 2 - 7 Jun 2016, pp.07014
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7.
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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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8.
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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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9.
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Scintillating bar detector for antiproton annihilations measurements
/ Corradini, M (Brescia U. ; INFN, Brescia) ; Leali, M (Brescia U. ; INFN, Brescia) ; Rizzini, E Lodi (Brescia U. ; INFN, Brescia) ; Mascagna, V (Brescia U. ; INFN, Brescia) ; Prest, M (Insubria U., Varese ; INFN, Milan Bicocca) ; Vallazza, E (INFN, Trieste) ; Venturelli, L (Brescia U. ; INFN, Brescia)
A detector used in two different experiments of the ASACUSA Collaboration at the CERN Antiproton Decelerator is presented. It consists of several modules, each one made of ~1 m long scintillating bars, which allows the detection of the charged particles produced in the antiproton-nuclei annihilations. [...]
2015 - 6 p.
- Published in : Hyperfine Interact. 233 (2015) 53-58
In : 5th International Conference on Exotic Atoms and Related Topics, Vienna, Austria, 15 - 19 Sep 2014, pp.53-58
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10.
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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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