Measurement of the branching fraction B(Λ[subscript b][superscript 0]→Λ[subscript c][superscript +]π[superscript -]π[superscript +]π[superscript -]) at CDF
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Aaltonen-2012-Measurement of the branching fraction.pdf
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Author(s)
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Paus, Christoph M. E.
Alternative Title
Measurement of the branching fraction B(Λb0→Λc+π-π+π-) at CDF
Date Issued
February 2012
Journal
Physical Review D
Publisher
American Physical Society
Citation
Aaltonen, T. et al. “Measurement of the Branching Fraction B(Λ_{b}^{0}→Λ_{c}^{+}π^{-}π^{+}π^{-}) at CDF.” Physical Review D 85.3 (2012): Web. 11 May 2012. © 2012 American Physical Society
Version
Final published version
Abstract
We report an analysis of the Λ[subscript b][superscript 0]→Λ[subscript c][superscript +]π[superscript -]π[superscript +]π[superscript -] decay in a data sample collected by the CDF II detector at the Fermilab Tevatron corresponding to 2.4 fb[superscript -1] of integrated luminosity. We reconstruct the currently largest samples of the decay modes Λ[subscript b][superscript 0]→Λ[subscript c](2595)[superscript +]π[superscript -] (with Λ[subscript c](2595)[superscript +]→Λ[subscript c][superscript +]π[superscript +]π[superscript -]), Λ[subscript b][superscript 0]→Λ[subscript c](2625)[superscript +]π[superscript -] (with Λ[subscript c](2625)[superscript +]→Λ[subscript c][superscript +]π[superscript +]π[superscript -]), Λ[subscript b][superscript 0]→Σ[subscript c](2455)[superscript ++]π[superscript -]π[superscript -] (with Σ[subscript c](2455)[superscript ++]→Λ[subscript c][superscript +]π[superscript +]), and Λ[subscript b][superscript 0]→Σ[subscript c](2455)[superscript 0]π[superscript +]π[superscript -] (with Σ[subscript c](2455)[superscript 0]→Λ[subscript c][superscript +]π[superscript -]) and measure the branching fractions relative to the Λ[subscript b][supersccript 0]→Λ[subscript c][superscript +]π[superscript -] branching fraction. We measure the ratio B(Λ[subscript b][superscript 0]→Λ[subscript c][superscript +]π[superscript -]π[superscript +]π[superscript -])/ B(Λ[subscript b][superscript 0]→Λ[subscript c][[superscript +]π[superscript -])=3.04±0.33(stat)[subscript -0.55][superscript +0.70](syst) which is used to derive B(Λ[subscript b][superscript 0]→Λ[subscript c][superscript +]π[superscript -]π[superscript +]π[superscript -])=(26.8[subscript -11.2][superscript +11.9])×10[superscript -3].
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.85.032003
