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Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/22171
Title: Observation of New Charmless Decays of Bottom Hadrons
Authors: 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.
Issue Date: 17-Jul-2009
Publisher: American Physical Society
Citation: Physical Review Letters 103 (3): 031801 (2009)
Abstract: 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.
Publisher version (URL): http://dx.doi.org/ 10.1103/PhysRevLett.103.031801
URI: http://hdl.handle.net/10261/22171
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.103.031801
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