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Observation of New Charmless Decays of Bottom Hadrons

Author(s)
Xie, Si; Knuteson, Bruce O.; Henderson, C.; Hahn, Kristian Allan; Gomez-Ceballos, Guillelmo; Choudalakis, Georgios; Paus, Christoph M. E.; Makhoul, Khaldoun; Goncharov, Maxim; Bauer, Gerry P; ... Show more Show less
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Abstract
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.
Date issued
2009-07
URI
http://hdl.handle.net/1721.1/51899
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
CDF Collaboration et al. “Observation of New Charmless Decays of Bottom Hadrons.” Physical Review Letters 103.3 (2009): 031801. © 2009 The American Physical Society
Version: Final published version
ISSN
0031-9007

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