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Confinement of antihydrogen for 1000 seconds | | ALPHA Collaboration
; G.B. Andresen
; M.D. Ashkezari
; M. Baquero-Ruiz
; W. Bertsche
; E. Butler
; C.L. Cesar
; A. Deller
; S. Eriksson
; J. Fajans
; T. Friesen
; M.C. Fujiwara
; D.R. Gill
; A. Gutierrez
; J.S. Hangst
; W.N. Hardy
; R.S. Hayano
; M.E. Hayden
; A.J. Humphries
; R. Hydomako
; S. Jonsell
; S. Kemp
; L. Kurchaninov
; N. Madsen
; S. Menary
; P. Nolan
; K. Olchanski
; A. Olin
; P. Pusa
; C.Ø. Rasmussen
; F. Robicheaux
; E. Sarid
; D.M. Silveira
; C. So
; J.W. Storey
; R.I. Thompson
; D.P. van der Werf
; J.S. Wurtele
; Y. Yamazaki
; | | Date: |
26 Apr 2011 | | Abstract: | Atoms made of a particle and an antiparticle are unstable, usually surviving
less than a microsecond. Antihydrogen, made entirely of antiparticles, is
believed to be stable, and it is this longevity that holds the promise of
precision studies of matter-antimatter symmetry. We have recently demonstrated
trapping of antihydrogen atoms by releasing them after a confinement time of
172 ms. A critical question for future studies is: how long can anti-atoms be
trapped? Here we report the observation of anti-atom confinement for 1000 s,
extending our earlier results by nearly four orders of magnitude. Our
calculations indicate that most of the trapped anti-atoms reach the ground
state. Further, we report the first measurement of the energy distribution of
trapped antihydrogen which, coupled with detailed comparisons with simulations,
provides a key tool for the systematic investigation of trapping dynamics.
These advances open up a range of experimental possibilities, including
precision studies of CPT symmetry and cooling to temperatures where
gravitational effects could become apparent. | | Source: | arXiv, 1104.4982 | | Services: | Forum | Review | PDF | Favorites | |
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