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dc.contributor.authorKadyrov, Alisher
dc.contributor.authorBray, I.
dc.contributor.authorCharlton, M.
dc.contributor.authorFabrikant, I.
dc.date.accessioned2017-12-10T12:39:13Z
dc.date.available2017-12-10T12:39:13Z
dc.date.created2017-12-10T12:20:14Z
dc.date.issued2017
dc.identifier.citationKadyrov, A. and Bray, I. and Charlton, M. and Fabrikant, I. 2017. Quantum suppression of antihydrogen formation in positronium-antiproton scattering. Nature Communications. 8 (1): Article ID 1544.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/59220
dc.identifier.doi10.1038/s41467-017-01721-y
dc.description.abstract

The interaction of antiprotons with low-energy positronium atoms is a fundamental three-body problem whose significance is its utility for formation of antihydrogen. Particular importance resides in understanding processes involving excited positronium states. Until recently such studies were performed using classical techniques. However, they become inapplicable in the low-energy domain. Here we report the results of comprehensive quantum calculations, which include initial excited positronium states with principal quantum numbers up to n i?=?5. Contrary to expectation from earlier work, there are only muted increases in the cross-sections for antihydrogen formation for n i?>?3. We interpret this in terms of quantum suppression of the reaction at higher angular momenta. Furthermore, the cross-sections for elastic scattering are around two orders of magnitude higher, which we attribute to the degeneracy of the positronium states. We outline some experimental consequences of our results.

dc.publisherMacmillan Publishers Limited
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.titleQuantum suppression of antihydrogen formation in positronium-antiproton scattering
dc.typeJournal Article
dcterms.source.volume8
dcterms.source.number1
dcterms.source.issn2041-1723
dcterms.source.titleNature Communications
curtin.departmentDepartment of Physics and Astronomy
curtin.accessStatusOpen access


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