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% C.L.
Observation of New Charmless Decays of Bottom Hadrons RID G-1087-2011 RID E-4473-2011
DELL'ORSO, MAURO;DONATI, SIMONE;PUNZI, GIOVANNI;
2009-01-01
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% C.L.File in questo prodotto:
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