Observation of New Charmless Decays of Bottom Hadrons

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dc.contributor University of Helsinki, Department of Physics en
dc.contributor University of Helsinki, Department of Physics en
dc.contributor University of Helsinki, Department of Physics en
dc.contributor University of Helsinki, Helsinki Institute of Physics en
dc.contributor University of Helsinki, Department of Physics en
dc.contributor University of Helsinki, Department of Physics en
dc.contributor.author Aaltonen, T.
dc.contributor.author Mehtälä, Petteri
dc.contributor.author Orava, Risto
dc.contributor.author Mäki, Tuula
dc.contributor.author Saarikko, Heimo
dc.contributor.author Österberg, Kenneth
dc.contributor.author CDF Collaboration
dc.date.accessioned 2011-01-06T11:50:05Z
dc.date.available 2011-01-06T11:50:05Z
dc.date.issued 2009
dc.identifier.citation Aaltonen , T , Mehtälä , P , Orava , R , Mäki , T , Saarikko , H , Österberg , K & CDF Collaboration 2009 , ' Observation of New Charmless Decays of Bottom Hadrons ' Physical Review Letters , vol 103 , no. 3 , pp. 031801 . , 10.1103/PhysRevLett.103.031801 en
dc.identifier.issn 0031-9007
dc.identifier.other PURE: 9951149
dc.identifier.other PURE UUID: 7ce7939d-73dd-4ef4-b7b1-85c7b7fb155f
dc.identifier.other ArXiv: http://arxiv.org/abs/0812.4271v1
dc.identifier.uri http://hdl.handle.net/10138/24481
dc.description.abstract We search for new charmless decays of neutral b-hadrons to pairs of charged hadrons with the upgraded Collider Detector at the Fermilab Tevatron. Using a data sample corresponding to 1 fb-1 of integrated luminosity, we report the first observation of the B0s->K-pi+ decay, with a significance of 8.2 sigma, and measure BR(B0s->K-pi+)= (5.0+-0.7(stat)+-0.8(syst))*10^{-6}. We also report the first observation of charmless b-baryon decays in the channels Lambda_b -> p pi and Lambda_b -> pK with significances of 6.0 sigma and 11.5 sigma respectively, and we measure BR(Lambda_b->p pi-) = (3.5+-0.6(stat)+-0.9(syst))*10^{-6} and BR(Lambda_b->p K-) = (5.6+-0.8(stat)+-1.5(syst))*10^{-6}. No evidence is found for the decays B0->K+K- and B0s -> pi+pi-, and we set an improved upper limit BR(B0s -> pi+pi-) K+pi-)$ as a reference. fi
dc.format.extent 8
dc.language.iso eng
dc.publisher American Institute of Physics
dc.relation.ispartof Physical Review Letters
dc.subject 114 Physical sciences en
dc.subject hep-ex en
dc.subject hep-ph en
dc.title Observation of New Charmless Decays of Bottom Hadrons en
dc.type A1 Refereed journal article
dc.identifier.doi http://dx.doi.org/10.1103/PhysRevLett.103.031801
dc.type.uri info:eu-repo/semantics/article
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