MG13 - Talk detail |
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Participant |
Budker, Dmitry | |||||||
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Institution |
University of California at Berkeley - m/s 7300 - Berkeley - California - USA | |||||||
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Session |
EG2 |
Accepted |
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Order |
Time |
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Talk |
Oral abstract |
Title |
New constraints on temporal variation of the fine-structure “constant” from the laboratory search with Dy | |||||
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Abstract |
Atomic dysprosium is a unique system with nearly degenerate opposite-parity states that have large and oppositely-signed sensitivity to a variation of \alpha, lending itself to a possibility of a sensitive test for a variation of a fundamental constant [1], which does not rely on a particularly sensitive clock. Building upon our earlier results [2] constraining the variation at a few parts per 1015 per year level (competitive with the state-of-the-art at that time), we conducted a new, at least an order of magnitude more sensitive search, the results of which will be presented at the meeting. A study of a systematic effect associated with the level shifts due to the black-body radiation will also be discussed. [1] V. A. Dzuba, V. V. Flambaum, and J. K. Webb, Phys. Rev. Lett. 82, 888 (1999). [2] A. Cingöz, N.A. Leefer, S.J. Ferrell, A. Lapierre, A.-T. Nguyen, V. V. Yashchuk, D. Budker, S. K. Lamoreaux, and J. R. Torgerson, A laboratory search for variation of the fine-structure constant using atomic dysprosium, Eur. Phys. J. Special Topics 163, 71-88 (2008). |
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