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Observation of the Semileptonic D+ Decay into the (K)over-bar(1)(1270)(0) Axial-Vector Meson
Inst High Energy Phys, Beijing, Peoples R China.
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.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
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Number of Authors: 4832019 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 123, no 23, article id 231801Article in journal (Refereed) Published
Abstract [en]

By analyzing a 2.93 fb(-1) data sample of e(+)e(-) collisions, recorded at a center-of-mass energy of 3.773 GeV with the BESIII detector operated at the BEPCII collider, we report the first observation of the semileptonic D+ transition into the axial-vector meson D+ -> (K) over bar (1) (1270)(0)e(+)nu(e) with a statistical significance greater than 10 sigma. Its decay branching fraction is determined to be B[D+ -> (K) over bar (1) (1270)(0)e(+)nu(e)] = (2.30 +/- 0.26(-0.21)(+0.18) +/- 0.25) x 10(-3), where the first and second uncertainties are statistical and systematic, respectively, and the third originates from the input branching fraction of (K) over bar (1)(1270)(0) -> K-pi(+)pi(0).

Place, publisher, year, edition, pages
2019. Vol. 123, no 23, article id 231801
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:uu:diva-400396DOI: 10.1103/PhysRevLett.123.231801ISI: 000499991300004OAI: oai:DiVA.org:uu-400396DiVA, id: diva2:1381186
Funder
Knut and Alice Wallenberg Foundation, 2016.0157Swedish Research CouncilGerman Research Foundation (DFG), Collaborative Research Center 502 CRC; 1044; FOR 2359
Note

For complete list of authors see http://dx.doi.org/10.1103/PhysRevLett.123.231801

Available from: 2019-12-20 Created: 2019-12-20 Last updated: 2019-12-20Bibliographically approved

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Adlarson, PatrikBiernat, JacekIkegami Andersson, WalterJohansson, TordKupsc, AndrzejLi, CuiPapenbrock, MichaelPettersson, JoachimSchönning, KarinThorén, ViktorWolke, Magnus
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