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Published November 6, 2012 | Published
Journal Article Open

Search for resonances decaying to η_cπ^+π^- in two-photon interactions


We report a study of the process γγ → X → η_cπ^+π^-, where X stands for one of the resonances χ_(c2)(1P), η_c(2S), X(3872), X(3915), or χ_(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_(X→γγ)B(X → η_cπ^+π^-): 15.7 eV for χ_(c2)(1P), 133 eV for η_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_(c2)(2P). We also report upper limits on the ratios of branching fractions B(η_c(2S)→ η_cπ^+π^-)/B(η_c(2S)→ K_S^0K^+π^-)<10.0 and B(χ_(c2)(1P)→ η_cπ^+π^-)/B(χ_c2(1P)→ K_S^0K^+π^-)<32.9 at the 90% confidence level.

Additional Information

© 2012 American Physical Society. Received 12 June 2012; published 6 November 2012. We are grateful for the extraordinary contributions of our PEP-II colleagues in achieving the excellent luminosity and machine conditions that have made this work possible. The success of this project also relies critically on the expertise and dedication of the computing organizations that support BABAR. The collaborating institutions wish to thank SLAC for its support and the kind hospitality extended to them. This work is supported by the U.S. Department of Energy and National Science Foundation, the Natural Sciences and Engineering Research Council (Canada), the Commissariat à l'Energie Atomique and Institut National de Physique Nucléaire et de Physique des Particules (France), the Bundesministerium für Bildung und Forschung and Deutsche Forschungsgemeinschaft (Germany), the Istituto Nazionale di Fisica Nucleare (Italy), the Foundation for Fundamental Research on Matter (Netherlands), the Research Council of Norway, the Ministry of Education and Science of the Russian Federation, Ministerio de Ciencia e Innovaciόn (Spain), and the Science and Technology Facilities Council (United Kingdom). Individuals have received support from the Marie-Curie IEF program (European Union), the A. P. Sloan Foundation (U.S.), and the Binational Science Foundation (U.S.-Israel).

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Published - PhysRevD.86.092005.pdf


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