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Observation of D-s(+) -> p(n)over-bar and confirmation of its large branching fraction
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.ORCID iD: 0000-0002-6945-716x
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.ORCID iD: 0000-0003-4937-2270
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Number of Authors: 4362019 (English)In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 99, no 3, article id 031101Article in journal (Refereed) Published
Abstract [en]

The baryonic decay D-s(+) -> p (n) over bar is observed, and the corresponding branching fraction is measured to be (1.21 +/- 0.10 +/- 0.05) x 10(-3), where the first uncertainty is statistical and second systematic. The data sample used in this analysis was collected with the BESIII detector operating at the BEPCII e(+)e(-) double-ring collider with a center-of-mass energy of 4.178 GeV and an integrated luminosity of 3.19 fb(-1). The result confirms the previous measurement by the CLEO Collaboration and is of greatly improved precision. This result will improve our understanding of the dynamical enhancement of the W-annihilation topology in the charmed meson decays.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC , 2019. Vol. 99, no 3, article id 031101
National Category
Subatomic Physics Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:uu:diva-378372DOI: 10.1103/PhysRevD.99.031101ISI: 000458818300001OAI: oai:DiVA.org:uu-378372DiVA, id: diva2:1294496
Funder
Swedish Research Council
Note

For complete list of authors see http://dx.doi.org/10.1103/PhysRevD.99.031101

Available from: 2019-03-07 Created: 2019-03-07 Last updated: 2019-03-07Bibliographically approved

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Andersson, Walter IkegamiJohansson, TordKupsc, AndrzejLi, CuiPapenbrock, MichaelPettersson, JoachimSchönning, KarinWolke, Magnus

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Physical Review D: covering particles, fields, gravitation, and cosmology
Subatomic PhysicsAstronomy, Astrophysics and Cosmology

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