Observation of New Charmless Decays of Bottom Hadrons

• Main Authors: Xie, Si (Contributor), Makhoul, K. (Contributor), Knuteson, Bruce O. (Contributor), Henderson, C. (Contributor), Hahn, Kristian Allan (Contributor), Goncharov, M. (Contributor), Gomez-Ceballos, Guillelmo (Contributor), Choudalakis, Georgios (Contributor), Bauer, Gerry P. (Contributor), Paus, Christoph M. E. (Contributor)
• Other Authors: Massachusetts Institute of Technology. Department of Physics (Contributor), Massachusetts Institute of Technology. Laboratory for Nuclear Science (Contributor)
• Format: Article
• Language: English
• Published: American Physical Society, 2010-03-02T20:11:49Z.
• Subjects: Article
• Online Access: Get fulltext

We search for new charmless decays of neutral b hadrons to pairs of charged hadrons, using 1  fb[superscript -1] of data collected by the CDF II detector at the Fermilab Tevatron. We report the first observation of the B[subscript s][superscript 0]→K[superscript -]π[superscript +] decay and measure B[subscript s][superscript 0]→K[superscript -]π[superscript +]=(5.0±0.7(stat)±0.8(syst))×10[superscript -6]. We also report the first observation of charmless b-baryon decays, and measure B(Λ[subscript b][superscript 0]→pπ[superscript -])=(3.5±0.6(stat)±0.9(syst))×10[superscript -6] and B(Λb0→pK-)=(5.6±0.8(stat)±1.5(syst))×10[superscript -6]. No evidence is found for other modes, and we set the limit B(B[subscript s][superscript 0]→π[superscript +]π[superscript -])<1.2×10[superscript -6] at 90% C.L.
Academy of Finland
Slovak R&D Agency
Programa Consolider-Ingenio 2010, Spain
Ministerio de Ciencia e Innovación, Spain
Russian Foundation for Basic Research
Institut National de Physique Nucleaire et Physique des Particules/CNRS
Royal Society, United Kingdom
Science and Technology Facilities Council, United Kingdom
Korean Research Foundation
Korean Science and Engineering Foundation
Bundesministerium für Bildung und Forschung, Germany
Alfred P. Sloan Foundation
Swiss National Science Foundation
National Science Council of the Republic of China
Natural Sciences and Engineering Research Council of Canada
Ministry of Education, Culture, Sports, Science and Technology of Japan
Italian Istituto Nazionale di Fisica Nucleare
National Science Foundation
United States Department of Energy