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001     295124
005     20211110133410.0
024 7 _ |a 10.3204/DESY-PROC-2011-04/crivelli_paolo
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100 1 _ |a Crivelli, Paolo
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111 2 _ |a 7th Patras Workshop on Axions, WIMPs and WISPs
|g AXION-WIMP 2011
|c Mykonos
|d 2011-06-27 - 2011-07-01
|w Greece
245 _ _ |a Positronium portal to the mirror world
260 _ _ |c 2011
|b Deutsches Elektronen-Synchrotron, DESY
|a Hamburg
300 _ _ |a 35-39
336 7 _ |a Conference Paper
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336 7 _ |a INPROCEEDINGS
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520 _ _ |a It was realized sometime ago by Glashow that the mirror matter could have a portal to our world through photon-mirror photon mixing ($\epsilon$) which would lead to orthopositronium (oPs) to mirror orthopositronium oscillations. This would result in a modification of the oPs decay rate however this effect is too small to be observed. Another experimental signature of this process is the apparently invisible decay of oPs. In this paper, we describe an experiment to search for the decay oPs$\to$invisible in a vacuum cavity with an expected sensitivity in the mixing strength of $\epsilon\simeq 10^{-9}$. This is more than one order of magnitude below the current Big Bang Nucleosynthesis limit and it is in a region of parameter space of great theoretical and phenomenological interest. An experiment with such a sensitivity is particularly timely in light of the recent claims for the observations of the annual modulation signal consistent with a mirror type dark matter interpretation.
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773 _ _ |a 10.3204/DESY-PROC-2011-04/crivelli_paolo
787 0 _ |a Schumann, Marc et.al.
|d 2011
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|r DESY-PROC-2011-04
|t Proceedings, 7th Patras Workshop on Axions, WIMPs and WISPs
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