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CP symmetry tests in the cascade-anticascade decay of charmonium
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.ORCID iD: 0000-0001-6280-3851
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, Pasteura 7, PL-02093 Warsaw, Poland.ORCID iD: 0000-0003-4937-2270
2019 (English)In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 100, no 11, article id 114005Article in journal (Refereed) Published
Abstract [en]

We analyze joint angular distributions of a charmonium decay to the Xi(Xi) over bar pair using the Xi -> Lambda pi -> p pi(-) pi weak decay chain for the cascade and the charge conjugated mode for the anticascade. The decays allow a direct comparison of the baryon and antibaryon decay properties and a sensitive test of CP symmetry in the strange baryon sector. We show that all involved decay parameters can be determined separately in vector and (pseudo)scalar charmonia decays into Xi(Xi) over bar due to the spin correlations between the weak decay chains. Contrary to the recently measured ethorne e(+)e(-) -> J/psi -> Lambda(Lambda) over bar process, the transverse polarization of the cascade is not needed and has almost no impact on the uncertainties of the decay parameters.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC , 2019. Vol. 100, no 11, article id 114005
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:uu:diva-400423DOI: 10.1103/PhysRevD.100.114005ISI: 000500722600004OAI: oai:DiVA.org:uu-400423DiVA, id: diva2:1381312
Available from: 2019-12-20 Created: 2019-12-20 Last updated: 2019-12-20Bibliographically approved

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Adlarson, PatrikKupsc, Andrzej

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