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Search for the weak decay eta ' -> K-+/-pi(-/+) and precise measurement of the branching fraction B(J/psi -> phi eta ')
Inst High Energy Phys, Beijing 100049, Peoples R China..
GI Budker Inst Nucl Phys SB RAS BINP, Novosibirsk 630090, Russia.;Novosibirsk State Univ, Novosibirsk 630090, Russia..
Inst High Energy Phys, Beijing 100049, Peoples R China..
Carnegie Mellon Univ, Pittsburgh, PA 15213 USA..
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2016 (English)In: PHYSICAL REVIEW D, ISSN 2470-0010, Vol. 93, no 7, 072008Article in journal (Refereed) PublishedText
Abstract [en]

We present the first search for the rare decay of eta' into K-+/- pi(-/+) in J/psi -> phi eta', using a sample of 1.3 x 10(9) J/psi events collected with the BESIII detector. No significant signal is observed, and the upper limit at the 90% confidence level for the ratio B(eta' -> K-+/- pi(-/+))/B(eta' -> gamma pi(+/-) pi(-/+)) is determined to be 1.3 x 10(-4). In addition, we report the measurement of the branching fraction of J/psi -> phi eta' to be [5.10 +/- 0.03(stat) +/- 0.32(syst)] x 10(-4), which agrees with previous results from BESII.

Place, publisher, year, edition, pages
2016. Vol. 93, no 7, 072008
National Category
Astronomy, Astrophysics and Cosmology
URN: urn:nbn:se:uu:diva-297905DOI: 10.1103/PhysRevD.93.072008ISI: 000374548000001OAI: oai:DiVA.org:uu-297905DiVA: diva2:944316
German Research Foundation (DFG), Collaborative Research Center CRC-1044Swedish Research Council
Available from: 2016-06-29 Created: 2016-06-28 Last updated: 2016-06-29Bibliographically approved

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