Observation of the Semileptonic D+ Decay into the (K)over-bar(1)(1270)(0) Axial-Vector Meson

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Related links:: https://doi.org/10.1...; show more...; https://uu.diva-port... (primary) (Raw object); https://urn.kb.se/re...; https://doi.org/10.1...; show less...

Abstract Subject headings

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).

By the author/editor: Ablikim, M.; Adlarson, Patrik; Biernat, Jacek; Ikegami Andersso ...; Johansson, Tord; Kupsc, Andrzej; show more...; Li, Cui, 1984-; Papenbrock, Mich ...; Pettersson, Joac ...; Schönning, Karin ...; Thorén, Viktor; Wolke, Magnus; Zou, J. H.; show less...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Subatomic Physic ...

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