Title: Testing isotropy of the universe using the Ramsey resonance technique on ultracold neutron spins
Authors: Altarev, I ×
Ban, G
Bison, G
Bodek, K
Daum, M
Fertl, M
Fierlinger, P
Franke, B
Gutsmiedl, E
Heil, W
Henneck, R
Horras, M
Khomutov, N
Kirch, K
Kistryn, S
Kraft, A
Knecht, A
Knowles, P
Kozela, A
Lauer, T
Lauss, B
Lefort, T
Lemiere, Y
Mtchedlishvili, A
Naviliat-Cuncic, O
Pazgalev, A
Petzoldt, G
Piegsa, F. M
Pierre, E
Pignol, G
Quemener, G
Rebetez, M
Rebreyend, D
Roccia, S
Schmidt-Wellenburg, P
Severijns, Nathal
Sobolev, Yu
Weis, A
Zejma, J
Zenner, J
Zsigmond, G #
Issue Date: Jun-2011
Publisher: North-Holland
Series Title: Physica B, Condensed Matter vol:406 issue:12 pages:2365-2369
Conference: 8th International Workshop on Polarised Neutrons for Condensed Matter Investigation Delft, NETHERLANDS, JUL 04-08, 2010
Abstract: Physics at the Planck scale could be revealed by looking for tiny violations of fundamental symmetries in low energy experiments. In 2008, a sensitive test of the isotropy of the universe has been performed with stored ultracold neutrons (UCN), this is the first clock-comparison experiment performed with free neutrons. During several days we monitored the Larmor frequency of neutron spins in a weak magnetic field using the Ramsey resonance technique. A nonzero cosmic axial field, violating rotational symmetry, would induce a daily variation of the precession frequency. Our null result constitutes one of the most stringent tests of Lorentz invariance to date.
ISSN: 0921-4526
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Nuclear and Radiation Physics Section
× corresponding author
# (joint) last author

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