Evidence for the Charmless Annihilation Decay Mode Bs0π+π

T. Aaltonen et al. (CDF Collaboration)
Phys. Rev. Lett. 108, 211803 – Published 23 May 2012
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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 6fb1 of integrated luminosity, we obtain the first evidence for the Bs0π+π decay, with a significance of 3.7σ, and a measured branching ratio B(Bs0π+π)=(0.57±0.15(stat)±0.10(syst))×106. A search for the B0K+K mode in the same sample yields a significance of 2.0σ, and a central value estimate B(B0K+K)=(0.23±0.10(stat)±0.10(syst))×106.

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  • Received 1 November 2011

DOI:https://doi.org/10.1103/PhysRevLett.108.211803

© 2012 American Physical Society

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Vol. 108, Iss. 21 — 25 May 2012

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