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Observation of chi(cJ) decays to Lambda(Lambda)over-bar pi(+)pi(-)
- Publication Year :
- 2012
- Publisher :
- Amer Physical, 2012.
-
Abstract
- Decays of the chi(cJ) states (J = 0, 1, 2) to Lambda(Lambda) over bar pi(+)pi(-), including processes with intermediate Sigma(1385), are studied through the E1 transition psi(1) -> gamma chi(cJ) using 106 x 10(6) psi(1) events collected with the BESIII detector at BEPCII. This is the first observation of chi(cJ) decays to the final state Lambda(Lambda) over bar pi(+)pi(-). The branching ratio of the intermediate process chi(cJ) -> (Sigma) over bar (1385)(+/-) (Sigma) over bar (1385)(-/+) is also measured for the first time, and the results agree with the theoretical predictions based on the color-octet effect. Ministry of Science and Technology, China - 2009CB825200 National Natural Science Foundation of China (NSFC) - 10625524 / 10821063 / 10825524 / 10835001 10935007 / 10905091 / 11079030 / 11125525 / 11079008 / 11179007 Chinese Academy of Sciences - KJCX2-YW-N29 / KJCX2-YW-N45 Research Fund for the Doctoral Program of Higher Education of China (RFDP) - 20093402120022 Specialized Research Fund for the Doctoral Program of Higher Education (SRFDP) Istituto Nazionale di Fisica Nucleare (INFN) United States Department of Energy (DOE) - DE-FG02-04ER41291 / DE-FG02-91ER40682 / DE-FG02-94ER40823 National Science Foundation (NSF) University of Groningen (RuG) Helmholtzzentrum fuer Schwerionenforschung GmbH (GSI), Darmstadt WCU Program of National Research Foundation of Korea - R32-2008-000-10155-0
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.od......9458..8f05f21f7cbc06431a39c9c9cde37f93