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Preprints, Working Papers, ... Year : 2013

Annihilation of low energy antiprotons in silicon

S. Aghion
  • Function : Author
O. Ahlén
  • Function : Author
A. S. Belov
  • Function : Author
G. Bonomi
  • Function : Author
P. Bräunig
  • Function : Author
J. Bremer
  • Function : Author
R. S. Brusa
  • Function : Author
G. Burghart
  • Function : Author
M. Caccia
  • Function : Author
C. Canali
  • Function : Author
R. Caravita
  • Function : Author
F. Castelli
  • Function : Author
G. Cerchiari
  • Function : Author
S. Cialdi
  • Function : Author
D. Comparat
G. Consolati
  • Function : Author
J. H. Derking
  • Function : Author
S. Di Domizio
  • Function : Author
L. Di Noto
  • Function : Author
M. Doser
  • Function : Author
A. Dudarev
  • Function : Author
R. Ferragut
  • Function : Author
A. Fontana
P. Genova
  • Function : Author
M. Giammarchi
  • Function : Author
A. Gligorova
  • Function : Author
S. N. Gninenko
  • Function : Author
S. Haider
  • Function : Author
J. Harasimowicz
  • Function : Author
T. Huse
  • Function : Author
E. Jordan
  • Function : Author
L. V. Jørgensen
  • Function : Author
T. Kaltenbacher
  • Function : Author
A. Kellerbauer
  • Function : Author
A. Knecht
  • Function : Author
D. Krasnický
  • Function : Author
V. Lagomarsino
  • Function : Author
A. Magnani
  • Function : Author
S. Mariazzi
  • Function : Author
V. A. Matveev
  • Function : Author
F. Moia
  • Function : Author
G. Nebbia
  • Function : Author
N. Pacifico
  • Function : Author
V. Petrácek
  • Function : Author
F. Prelz
M. Prevedelli
C. Regenfus
  • Function : Author
C. Riccardi
  • Function : Author
O. Røhne
  • Function : Author
A. Rotondi
  • Function : Author
H. Sandaker
  • Function : Author
A. Sosa
  • Function : Author
M. A. Subieta Vasquez
  • Function : Author
M. Špacek
  • Function : Author
G. Testera
  • Function : Author
C. P. Welsch
  • Function : Author
S. Zavatarelli
  • Function : Author

Abstract

The goal of the AE$\mathrm{\bar{g}}$IS experiment at the Antiproton Decelerator (AD) at CERN, is to measure directly the Earth's gravitational acceleration on antimatter. To achieve this goal, the AE$\mathrm{\bar{g}}$IS collaboration will produce a pulsed, cold (100 mK) antihydrogen beam with a velocity of a few 100 m/s and measure the magnitude of the vertical deflection of the beam from a straight path. The final position of the falling antihydrogen will be detected by a position sensitive detector. This detector will consist of an active silicon part, where the annihilations take place, followed by an emulsion part. Together, they allow to achieve 1$%$ precision on the measurement of $\bar{g}$ with about 600 reconstructed and time tagged annihilations. We present here, to the best of our knowledge, the first direct measurement of antiproton annihilation in a segmented silicon sensor, the first step towards designing a position sensitive silicon detector for the AE$\mathrm{\bar{g}}$IS experiment. We also present a first comparison with Monte Carlo simulations (GEANT4) for antiproton energies below 5 MeV

Dates and versions

in2p3-00999409 , version 1 (03-06-2014)

Identifiers

  • HAL Id : in2p3-00999409 , version 1
  • ARXIV : 1311.4982

Cite

S. Aghion, O. Ahlén, A. S. Belov, G. Bonomi, P. Bräunig, et al.. Annihilation of low energy antiprotons in silicon. 2014. ⟨in2p3-00999409⟩
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