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Evidence for the charmless annihilation decay mode Bs0→π +π -

AuthorsAaltonen, T.; Álvarez González, B.; Casal, Bruno ; Cuevas, Javier ; Gómez, G. ; Palencia, Enrique ; Rodrigo, Teresa ; Ruiz Jimeno, Alberto ; Scodellaro, Luca ; Vila, Iván ; Vilar, Rocío ; Vizán, J. ; CDF Collaboration
Issue Date2012
PublisherAmerican Physical Society
CitationPhysical Review Letters 108: 211803 (2012)
AbstractWe 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-1 of integrated luminosity, we obtain the first evidence for the Bs0→π+π- decay, with a significance of 3.7σ, and a measured branching ratio B(Bs0→π+π-)=(0.57±0.15(stat)±0.10(syst))×10-6. A search for the B0→K+K- mode in the same sample yields a significance of 2.0σ, and a central value estimate B(B0→K+K-)=(0.23±0.10(stat)±0.10(syst))×10-6.
DescriptionAaltonen, T. et al.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevLett.108.211803
Identifiersdoi: 10.1103/PhysRevLett.108.211803
issn: 0031-9007
e-issn: 1079-7114
Appears in Collections:(IFCA) Artículos
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