Dalitz plot analysis of η[subscript c] → K[superscript +]K[superscript −]η and η[subscript c] → K[superscript +]K[superscript −]π[superscript 0] in two-photon interactions
Name
Lees-2014-Dalitz plot analysis.pdf
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1.46 MB
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Author(s)
Sciolla, Gabriella
Cowan, Ray F
Date Issued
June 2014
Journal
Physical Review D
Publisher
American Physical Society
Citation
Lees, J. P., V. Poireau, V. Tisserand, E. Grauges, A. Palano, G. Eigen, B. Stugu, et al. “Dalitz Plot Analysis of η[subscript c] → K[superscript +]K[superscript −]η and η[subscript c] → K[superscript +]K[superscript −]π[superscript 0] in Two-Photon Interactions.” Phys. Rev. D 89, no. 11 (June 2014). © 2014 American Physical Society
Version
Final published version
Abstract
We study the processes γγ → K[superscript +]K[superscript −]η and γγ → K[superscript +]K[superscript −]π[superscript 0] using a data sample of 519 fb[superscript −1] recorded with the BABAR detector operating at the SLAC PEP-II asymmetric-energy e[superscript +]e[superscript −] collider at center-of-mass energies at and near the Υ(nS) (n = 2,3,4) resonances. We observe η[subscript c] → K[superscript +]K[superscript −]π[superscript 0] and η[subscript c] → K[superscript +]K[superscript −]η decays, measure their relative branching fraction, and perform a Dalitz plot analysis for each decay. We observe the K[∗ over 0](1430) → Kη decay and measure its branching fraction relative to the Kπ decay mode to be R(K[∗ over 0](1430)) = [B(K[∗ over 0](1430) → Kη) over B(K[∗ over 0](1430) → Kπ)] = 0.092 ± 0.025[+0.010 over −0.025]. The η[subscript c] → K[superscript +]K[superscript −]η and K[∗ over 0](1430) → Kη results correspond to the first observations of these channels. The data also show evidence for η[subscript c](2S) → K[superscript +]K[superscript −]π[superscript 0] and first evidence for η[subscript c](2S) → K[superscript +]K[superscript −]η.
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.89.112004
