- Tytuł:
- Positronium for antihydrogen production in the AEGIS experiment
- Autorzy:
-
Consolati, G.
Aghion, S.
Amsler, C.
Bonomi, G.
Brusa, R.
Caccia, M.
Caravita, R.
Castelli, F.
Cerchiari, G.
Comparat, D.
Demetrio, A.
Di Noto, L.
Doser, M.
Evans, C.
Fanì, M.
Ferragut, R.
Fesel, J.
Fontana, A.
Gerber, S.
Giammarchi, M.
Gligorova, A.
Guatieri, F.
Haider, S.
Hinterberger, A.
Holmestad, H.
Kellerbauer, A.
Khalidova, O.
Krasnicky, D.
Lagomarsino, V.
Lansonneur, P.
Lebrun, P.
Malbrunot, C.
Mariazzi, S.
Marton, J.
Matveev, V.
Mazzotta, Z.
Müller, S.
Nebbia, G.
Nedelec, P.
Oberthaler, M.
Pacifico, N.
Pagano, D.
Penasa, L.
Petracek, V.
Prelz, F.
Prevedelli, M.
Ravelli, L.
Rienaecker, B.
Robert, J.
Røhne, O.
Rotondi, A.
Sandaker, H.
Santoro, R.
Smestad, L.
Sorrentino, F.
Testera, G.
Tietje, I.
Widmann, E.
Yzombard, P.
Zimmer, C.
Zmeskal, J.
Zurlo, N. - Tematy:
-
04.80.Cc
07.77.-n
36.10.Dr
78.70.Bj - Pokaż więcej
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Powiązania:
- https://bibliotekanauki.pl/articles/1057954.pdf Link otwiera się w nowym oknie
- Opis:
- The primary goal of the Antihydrogen Experiment: Gravity, Interferometry, Spectroscopy (AEGIS) collaboration is to measure for the first time precisely the gravitational acceleration of antihydrogen, H̅, a fundamental issue of contemporary physics, using a beam of antiatoms. Indeed, although indirect arguments have been raised against a different acceleration of antimatter with respect to matter, nevertheless some attempts to formulate quantum theories of gravity, or to unify gravity with the other forces, consider the possibility of a non-identical gravitational interaction between matter and antimatter. We plan to generate H̅ through a charge-exchange reaction between excited Ps and antiprotons coming from the Antiproton Decelerator facility at CERN. It offers the advantage to produce sufficiently cold antihydrogen to make feasible a measurement of gravitational acceleration with reasonable uncertainty (of the order of a few percent). Since the cross-section of the above reaction increases with n⁴, n being the principal quantum number of Ps, it is essential to generate Ps in a highly excited (Rydberg) state. This will occur by means of two laser excitations of Ps emitted from a nanoporous silica target: a first UV laser (at 205 nm) will bring Ps from the ground to the n=3 state; a second laser pulse (tunable in the range 1650-1700 nm) will further excite Ps to the Rydberg state.
- Dostawca treści:
- Biblioteka Nauki
Artykuł