Observation of the decay B̅ 0→Λc+p̅ π0

• Main Authors: Cowan, Ray Franklin (Contributor), Dujmic, Denis (Contributor), Fisher, Peter H. (Contributor), Henderson, Shawn Wesley (Contributor), Sciolla, Gabriella (Contributor), Spitznagel, Michael (Contributor), Yamamoto, Richard K. (Contributor), Zhao, Min Liang (Contributor)
• Other Authors: Massachusetts Institute of Technology. Department of Physics (Contributor), Massachusetts Institute of Technology. Laboratory for Nuclear Science (Contributor), Fisher, Peter H (Contributor)
• Format: Article
• Language: English
• Published: American Physical Society, 2011-02-03T20:43:20Z.
• Subjects: Article
• Online Access: Get fulltext

In a sample of 467×106 BB̅ pairs collected with the BABAR detector at the PEP-II collider at SLAC we have observed the decay B̅ 0[beta superscript -0]→Λc+p̅ π0 [delta subscript c superscript +]p[superscript - pi 0] and measured the branching fraction to be (1.94±0.17±0.14±0.50)×10[superscript -4], where the uncertainties are statistical, systematic, and the uncertainty on the Λc+ [delta subscript c superscript +]→pK-π+ [p kappa superscript - pi +-π+ branching fraction, respectively. We determine an upper limit of 1.5×10[superscript -6] at 90% C.L. for the product branching fraction B(B̅ [superscript 0]→Σ [sigma subscript c superscript +](2455)p̅)×B(Λ [delta subscript c superscript +]→pK-π+ [p kappa superscript- pi +]). Furthermore, we observe an enhancement at the threshold of the invariant mass of the baryon-antibaryon pair.
United States. Dept. of Energy.
National Science Foundation (U.S.)
Natural Sciences and Engineering Research Council of Canada
Institut national de physique nucléaire et de physique des particules
France. Commissariat à l'énergie atomique
Deutsche Forschungsgemeinschaft (DFG)
Germany. Federal Ministry of Education and Research (BMBF)
Istituto nazionale di fisica nucleare
Foundation for Fundamental Research on Matter (Netherlands)
Research Council of Norway
Ministry of Education and Science of the Russian Federation
Spain. Ministerio de Ciencia e Innovación (MICINN)
Science and Technology Facilities Council (Great Britain)
Marie Curie International Fellowship
Alfred P. Sloan Foundation
United States-Israel Binational Science Foundation