Probing CP symmetry and weak phases with entangled double-strange baryons

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dc.authoridSerkant Ali Çetin / 0000-0001-5050-8441en_US
dc.authoridOnur Buğra Kolcu / 0000-0002-9177-1286en_US
dc.authorscopusidSerkant Ali Çetin / 34567544400
dc.authorwosidSerkant Ali Çetin / AGF-0147-2022en_US
dc.authorwosidOnur Buğra Kolcu / P-4990-2015en_US
dc.contributor.authorAblikim, M.
dc.contributor.authorAchasov, M. N.
dc.contributor.authorAdlarson, P.
dc.contributor.authorÇetin, Serkant Ali
dc.contributor.authorKolcu Onur Buğra
dc.date.accessioned2022-06-17T14:07:50Z
dc.date.available2022-06-17T14:07:50Z
dc.date.issued2022en_US
dc.departmentİstinye Üniversitesien_US
dc.description.abstractThough immensely successful, the standard model of particle physics does not offer any explanation as to why our Universe contains so much more matter than antimatter. A key to a dynamically generated matter-antimatter asymmetry is the existence of processes that violate the combined charge conjugation and parity (CP) symmetry(1). As such, precision tests of CP symmetry may be used to search for physics beyond the standard model. However, hadrons decay through an interplay of strong and weak processes, quantified in terms of relative phases between the amplitudes. Although previous experiments constructed CP observables that depend on both strong and weak phases, we present an approach where sequential two-body decays of entangled multi-strange baryon-antibaryon pairs provide a separation between these phases. Our method, exploiting spin entanglement between the double-strange baryon and its antiparticle(2) (+), has enabled a direct determination of the weak-phase difference, (xi(P) - xi(S)) = (1.2 +/- 3.4 +/- 0.8) x 10(-2) rad. Furthermore, three independent CP observables can be constructed from our measured parameters. The precision in the estimated parameters for a given data sample size is several orders of magnitude greater than achieved with previous methods(3). Finally, we provide an independent measurement of the recently debated Lambda decay parameter alpha(Lambda) (refs. (4,5)). The Lambda(Lambda) over bar asymmetry is in agreement with and compatible in precision to the most precise previous measurement(4).en_US
dc.identifier.citationAblikim, M., Achasov, M. N., Adlarson, P., Cetin, H. O., Kolcu, O. B. (2022). Probing CP symmetry and weak phases with entangled double-strange baryons. Nature, 606(7912), 64.en_US
dc.identifier.doi10.1038/s41586-022-04624-1en_US
dc.identifier.endpage64en_US
dc.identifier.issn0028-0836en_US
dc.identifier.issue7912en_US
dc.identifier.scopus2-s2.0-85131223834en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage64en_US
dc.identifier.urihttps://doi.org/10.1038/s41586-022-04624-1
dc.identifier.urihttps://hdl.handle.net/20.500.12713/2926
dc.identifier.volume606en_US
dc.identifier.wosWOS:000804867100009en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorÇetin, Serkant Ali
dc.institutionauthorKolcu, Onur Buğra
dc.language.isoenen_US
dc.publisherNATURE RESEARCHen_US
dc.relation.ispartofNATUREen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.titleProbing CP symmetry and weak phases with entangled double-strange baryonsen_US
dc.typeArticleen_US

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