Evidence for the Charmless Annihilation Decay Mode B[subscript s][superscript 0]→π[superscript +]π[superscript -]
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Aaltonen-2012-Evidence for the Charmless Annihilation Decay.pdf
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Author(s)
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Paus, Christoph M. E.
Date Issued
May 2012
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
T. Aaltonen et al. "Evidence for the Charmless Annihilation Decay Mode B[subscript s][superscript 0]→π[superscript +]π[superscript -]" Physical Review Letters 108, 211803 (2012). © 2012 American Physical Society
Version
Final published version
Abstract
We search for annihilation decay modes of neutral b mesons into pairs of charmless charged hadrons with the upgraded Collider Detector at the Fermilab Tevatron. Using a data sample corresponding to 6 fb[superscript -1] of integrated luminosity, we obtain the first evidence for the B[subscript s][superscript 0]→π[superscript +]π[superscript -] decay, with a significance of 3.7σ, and a measured branching ratio B(B[subscript s][superscript 0]→π[superscript +]π[superscript -])=(0.57±0.15(stat)±0.10(syst))×10[superscript -6]. A search for the B[superscript 0]→K[superscript +]K[superscript -] mode in the same sample yields a significance of 2.0σ, and a central value estimate B(B[superscript 0]→K[superscript +]K[superscript -])=(0.23±0.10(stat)±0.10(syst))×10[superscript -6].
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/PhysRevLett.108.211803
