Institute: MPI für Physik     Collection: YB 2016     Display Documents

ID: 715989.0, MPI für Physik / YB 2016
Updated Cross Section Measurement of $e^+ e^- \\to K^+ K^- J/\\psi$ and $K_S^0K_S^0J/\\psi$ via Initial State Radiation at Belle
Authors:
Date of Publication (YYYY-MM-DD):2014
Title of Journal:Physical Review D
Journal Abbrev.:Phys.Rev.D
Issue / Number:89
Start Page:072015
Audience:Not Specified
Intended Educational Use:No
Abstract / Description:The cross sections of the processes $e^+ e^- \\to K^+ K^- J/\\psi$ and $K_S^0K_S^0J/\\psi$ are measured via initial state radiation at center-of-mass energies between the threshold and 6.0~GeV using a data sample of 980~fb$^{-1}$ collected with the Belle detector on or near the $\\Upsilon(nS)$ resonances, where $n=$1, 2, ..., 5. The cross sections for $e^+ e^- \\to K^+ K^- J/\\psi$ are at a few pb level and the average cross section for $e^+ e^- \\to K_S^0K_S^0J/\\psi$ is $1.8\\pm 0.6 (\\rm stat.)\\pm 0.3 (\\rm syst.)$~pb between 4.4 and 5.2~GeV. All of them are consistent with previously published results with improved precision. A search for resonant structures and associated intermediate states in the cross section of the process $e^+ e^- \\to K^+ K^- J/\\psi$ is performed.
Classification / Thesaurus:Belle II
Comment of the Author/Creator:14 pages, 7 figures
External Publication Status:published
Document Type:Article
Communicated by:MPI für Physik
Affiliations:
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