Search for resonances decaying to η[subscript c]π[superscript +]π[superscript -] in two-photon interactions
Name
Lees-2012-Search for resonances decaying.pdf
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Author(s)
Sciolla, Gabriella
Dujmic, Denis
Cowan, Ray F
Date Issued
November 2012
Journal
Physical Review D
Publisher
American Physical Society
Citation
Lees, J. P. et al. “Search for resonances decaying to η[subscript c]π[superscript +]π[superscript -] in two-photon interactions.” Physical Review D 86.9 (2012). © 2012 American Physical Society
Version
Final published version
Abstract
We report a study of the process γγ→X→η[subscript c]π[superscript +]π[superscript -], where X stands for one of the resonances χ[subscript c2](1P), η[subscript c](2S), X(3872), X(3915), or χ[subscript c2](2P). The analysis is performed with a data sample of 473.9 fb-1 collected with the BABAR detector at the PEP-II asymmetric-energy electron-positron collider. We do not observe a significant signal for any channel, and calculate 90% confidence-level upper limits on the products of branching fractions and two-photon widths Γ[subscript ]X→[subscript γγ]B(X→η[subscript c]π[superscript +]π[superscript -]): 15.7 eV for χ[subscript c2](1P), 133 eV for η[subscript c](2S), 11.1 eV for X(3872) (assuming it to be a spin-2 state), 16 eV for X(3915) (assuming it to be a spin-2 state), and 18 eV for χ[subscript c2](2P). We also report upper limits on the ratios of branching fractions B(η[subscript c](2S)→η[subscript c]π[superscript +]π[superscript -])/B(η[subscript c](2S)→K[subscript S][superscript 0]K[superscript +]π[superscript -])<10.0 and B(χ[subscript c2](1P)→η[subscript c]π[superscript +]π[superscript -])/B(χ[subscript c2](1P)→K[subscript S]0K[superscript +]π[superscript -])<32.9 at the 90% confidence level.
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.86.092005
