Evidence for the Charmless Annihilation Decay Mode B[subscript s][superscript 0]→π[superscript +]π[superscript -]

Author(s)
Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Paus, Christoph M. E.
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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].
Date issued
2012-05
URI
http://hdl.handle.net/1721.1/71688
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
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
ISSN
0031-9007
1079-7114
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