1 Ocak 2019 Dergi makalesi Açık Erişim

CERN İşbirliği

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    <subfield code="a">Evidence for the decays of 
					 and 
					Supported in part by National Key Basic Research Program of China (2015CB856700); National Natural Science Foundation of China (NSFC)(11235011, 11275266, 11335008, 11425524, 11625523, 11635010); the Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; the CAS Center for Excellence in Particle Physics (CCEPP); Joint Large-Scale Scientific Facility Funds of the NSFC and CAS (U1332201, U1532257, U1532258); CAS (KJCX2-YW-N29, KJCX2-YW-N45, QYZDJ-SSW-SLH003); 100 Talents Program of CAS; National 1000 Talents Program of China; INPAC and Shanghai Key Laboratory for Particle Physics and Cosmology; German Research Foundation DFG (Collaborative Research Center CRC 1044, FOR 2359); Istituto Nazionale di Fisica Nucleare, Italy; Koninklijke Nederlandse Akademie van Wetenschappen (KNAW) (530-4CDP03); Ministry of Development of Turkey (DPT2006K-120470); National Science and Technology fund; The Swedish Research Council; U. S. Department of Energy under (DE-FG02-05ER41374, DE-SC-0010118, DE-SC-0010504, DE-SC-0012069); University of Groningen (RuG) and the Helmholtzzentrum fuer Schwerionenforschung GmbH (GSI), Darmstadt; WCU Program of National Research Foundation of Korea (R32-2008-000-10155-0)</subfield>
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    <subfield code="a">CERN İşbirliği</subfield>
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    <subfield code="a">&lt;p&gt;We study the hadronic decays of 
					 to the final states 
					 and 
					, using an 
					 annihilation data sample of 567 pb-1 taken at a center-of-mass energy of 4.6 GeV with the BESIII detector at the BEPCII collider. We find evidence for the decays 
					 and 
					 with statistical significance of 
					 and 
					, respectively. Normalizing to the reference decays 
					 and 
					, we obtain the ratios of the branching fractions 
					 and 
					 to be 
					 and 
					, respectively. The upper limits at the 90% confidence level are set to be 
					 and 
					. Using BESIII measurements of the branching fractions of the reference decays, we determine 
					% (&amp;lt;0.68%) and
					% (&amp;lt;1.9%). Here, the first uncertainties are statistical and the second systematic. The obtained branching fraction of
					 is consistent with the previous measurement, and the branching fraction of 
					 is measured for the first time.
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