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Annihilation of low energy antiprotons in silicon | | S. Aghion
; O. Ahlén
; A. S. Belov
; G. Bonomi
; P. Bräunig
; J. Bremer
; R. S. Brusa
; G. Burghart
; L. Cabaret
; M. Caccia
; C. Canali
; R. Caravita
; F. Castelli
; G. Cerchiari
; S. Cialdi
; D. Comparat
; G. Consolati
; J.H. Derking
; S. Di Domizio
; L. Di Noto
; M. Doser
; A. Dudarev
; R. Ferragut
; A. Fontana
; P. Genova
; M. Giammarchi
; A. Gligorova
; S. N. Gninenko
; S. Haider
; J. Harasimovic
; T. Huse
; E. Jordan
; L. V. Jørgensen
; T. Kaltenbacher
; A. Kellerbauer
; A. Knecht
; D. Krasnický
; V. Lagomarsino
; A. Magnani
; S. Mariazzi
; V. A. Matveev
; F. Moia
; G. Nebbia
; P. Nédélec
; N. Pacifico
; V. Petrácek
; F. Prelz
; M. Prevedelli
; C. Regenfus
; C. Riccardi
; O. Røhne
; A. Rotondi
; H. Sandaker
; A. Susa
; M. A. Subieta Vasquez
; M. Špacek
; G. Testera
; C. P. Welsch
; S.Zavatarelli
; | | Date: |
20 Nov 2013 | | Abstract: | The goal of the AE$mathrm{ar{g}}$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$mathrm{ar{g}}$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 $ar{g}$ 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$mathrm{ar{g}}$IS experiment. We also present a first comparison with
Monte Carlo simulations (GEANT4) for antiproton energies below 5 MeV | | Source: | arXiv, 1311.4982 | | Services: | Forum | Review | PDF | Favorites | |
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