Study of the baryonic B decay B^- → Σ_c^(++)pπ^-π^-

Creators: Lees, J. P.; Chao, D. S.; Cheng, C. H.; Echenard, B.; Flood, K. T.; Hitlin, D. G.; Ongmongkolkul, P.; Porter, F. C.; Rakitin, A. Y.; BaBar Collaboration

Abstract

We report the measurement of the baryonic B decay B^-→Σ_c^(++)p π^-π^-. Using a data sample of 467×10^6 BB pairs collected with the BABAR detector at the PEP-II storage ring at SLAC, the measured branching fraction is (2.98±0.16_((stat))±0.15_((syst))±0.77_((Λc)))×10^(-4), where the last error is due to the uncertainty in B(Λ_c^+→pK^-π^+). The data suggest the existence of resonant subchannels B^-→Λ_c(2595)^+p π^- and, possibly, B^-→Σ_c^(++)Δ^(--)π^-. We see unexplained structures in m(Σ_c^(++)π^-π^-) at 3.25 GeV/c^2, 3.8 GeV/c^2, and 4.2 GeV/c^2.

Additional Information

© 2012 American Physical Society. Received 17 August 2012; published 19 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) and the A. P. Sloan Foundation (USA).

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