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Precision measurements of branching fractions for psi ' -> pi(0)J/psi and eta J/Psi
- Publication Year :
- 2012
- Publisher :
- Amer Physical, 2012.
-
Abstract
- We present a precision study of the psi' -> pi(0)J/Psi and eta J/Psi decay modes. The measurements are obtained using 106 x 10(6) psi' events accumulated with the BESIII detector at the BEPCII e(+)e(-) collider operating at a center-of-mass energy corresponding to the psi' mass. We obtain B(psi' -> pi(0)J/Psi) = (1.26 +/- 0.02(stat) +/- 0.03(syst)) x 10(-3) and B(psi' -> eta J/Psi) = (33.75 +/- 0.17(stat) +/- 0.86(syst)) x 10(-3). The branching fraction ratio R = B(psi'->pi(0)J/psi)/B(psi'->eta J/psi) is determined to be (3.74 +/- 0.06(stat) +/- 0.04(syst)) x 10(-2). The precision of these measurements of B(Psi' -> pi(0)J/Psi) and R represent a significant improvement over previously published values. Ministry of Science and Technology, China - 2009CB825200 National Natural Science Foundation of China (NSFC) - 10625524 / 10821063 / 10825524 / 10835001 10935007 / 11125525 / 11079008 / 11179007 Chinese Academy of Sciences - KJCX2-YW-N29 / KJCX2-YW-N45 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 Türkiye Cumhuriyeti Kalkınma Bakanlığı - DPT2006K-120470
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.od......9458..3847c6b196afd8eb2eaf34327bc7f0c9