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Título : Observation of New Charmless Decays of Bottom Hadrons
Autor : CDF Collaboration, Cabrera, Susana, Cuenca Almenar, Cristóbal, Álvarez González, B., Casal, Bruno, Cuevas, Javier, Gómez, G., Rodrigo, Teresa, Ruiz, Alberto, Scodellaro, Luca, Vila, Iván, Vilar, Rocío, Aaltonen, T.
Fecha de publicación : 17-Jul-2009
Editor: American Physical Society
Resumen: We search for new charmless decays of neutral b hadrons to pairs of charged hadrons, using 1 fb(-1) of data collected by the CDF II detector at the Fermilab Tevatron. We report the first observation of the B-s(0)-> K-pi(+) decay and measure B(B-s(0)-> K-pi(+))=(5.0 +/- 0.7(stat)+/- 0.8(syst))x10(-6). We also report the first observation of charmless b-baryon decays, and measure B(Lambda(0)(b)-> p pi(-))=(3.5 +/- 0.6(stat)+/- 0.9(syst))x10(-6) and B(Lambda(0)(b)-> pK(-))=(5.6 +/- 0.8(stat)+/- 1.5(syst))x10(-6). No evidence is found for other modes, and we set the limit B(B-s(0)->pi(+)pi(-))< 1.2x10(-6) at 90% confidence level. All quoted branching fractions are measured using BR(B0->K+pi-)$ as a reference.
Versión del editor: 10.1103/PhysRevLett.103.031801
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.103.031801
Citación : Physical Review Letters 103 (3): 031801 (2009)
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