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Observation of the W-annihilation decay D-s(+) -> omega pi(+) and evidence for D-s(+) -> omega K+
Institute of High Energy Physics, Beijing 100049, People’s Republic of China.
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: 4582019 (English)In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 99, no 9, article id 091101Article in journal (Refereed) Published
Abstract [en]

We report the observation of W-annihilation decay D-s(+) -> omega pi(+) and evidence for D-s(+) -> omega K+ in a data sample corresponding to an integrated luminosity of 3.19 fb(-1) collected with the BESIII detector at a center-of-mass energy root s = 4.178 GeV. We obtain the branching fractions B(D-s(+) -> omega pi(+)) = (1.77 +/- 0.32(stat) +/- 0.13(sys)) x 10(-3) with a significance of 6.7 sigma and B(D-s(+) -> omega K+) = (0.87 +/- 0.24(stat) +/- 0.08(sys)) x 10(-3) with a significance of 4.4 sigma. This measurement provides critical information to determine the nonperturbative W-annihilation amplitudes and shows the potential of searching for CP asymmetry in D-s(+) -> omega K+.

Place, publisher, year, edition, pages
2019. Vol. 99, no 9, article id 091101
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Subatomic Physics
Identifiers
URN: urn:nbn:se:uu:diva-387289DOI: 10.1103/PhysRevD.99.091101ISI: 000467735200001OAI: oai:DiVA.org:uu-387289DiVA, id: diva2:1329103
Funder
Swedish Research Council
Note

For complete list of authors see http://dx.doi.org/10.1103/PhysRevD.99.091101

Available from: 2019-06-24 Created: 2019-06-24 Last updated: 2019-06-24Bibliographically approved

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Ikegami Andersson, WalterJohansson, TordKupsc, AndrzejPapenbrock, MichaelPettersson, JoachimSchönning, KarinWolke, Magnus
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