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Measurement of σΛb0B0×B(Λbo -> Λc+π)/B(B0 -> D+π) in pp Collisions at s√=1.96  TeV

CollaborationWith : Campanelli, Mario / Clark, Allan Geoffrey / Donega, Mauro / Moed, Shulamit / Sfyrla, Anna / Vallecorsa, Sofia / Wu, Xin
Published in Physical Review Letters. 2007, vol. 98, no. 12, p. 122002
Abstract We present the first observation of the baryon decay Λ0b→Λ+cπ− followed by Λ+c→pK−π+ in 106  pb−1 pp collisions at s√=1.96  TeV in the CDF experiment. In order to reduce systematic error, the measured rate for Λ0b decay is normalized to the kinematically similar meson decay B0→D+π− followed by D+→π+K−π+. We report the ratio of production cross sections (σ) times the ratio of branching fractions (B) for the momentum region integrated above pT>6  GeV/c and pseudorapidity range |η|<1.3: σ(pp→Λ0bX)/σ(pp→B0X)×B(Λ0b→Λ+cπ−)/B(B0→D+π−)=0.82±0.08(stat)±0.11(syst)±0.22[B(Λ+c→pK−π+)].
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CDF COLLABORATION. Measurement of σΛb0B0×B(Λbo -> Λc+π)/B(B0 -> D+π) in pp Collisions at s√=1.96  TeV. In: Physical Review Letters, 2007, vol. 98, n° 12, p. 122002. https://archive-ouverte.unige.ch/unige:38377

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Deposited on : 2014-07-01

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