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Measurement of the branching fraction B(Λb0 -> Λc+ππ+π) at CDF

CollaborationWith : Clark, Allan Geoffrey / Garcia Navarro, Jose Enrique / Lister, Alison / Wu, Xin
Published in Physical Review. D. 2012, vol. 85, no. 03, p. 032003
Abstract We report an analysis of the Λ0b→Λ+cπ−π+π− decay in a data sample collected by the CDF II detector at the Fermilab Tevatron corresponding to 2.4  fb−1 of integrated luminosity. We reconstruct the currently largest samples of the decay modes Λ0b→Λc(2595)+π− (with Λc(2595)+→Λ+cπ+π−), Λ0b→Λc(2625)+π− (with Λc(2625)+→Λ+cπ+π−), Λ0b→Σc(2455)++π−π− (with Σc(2455)++→Λ+cπ+), and Λ0b→Σc(2455)0π+π− (with Σc(2455)0→Λ+cπ−) and measure the branching fractions relative to the Λ0b→Λ+cπ− branching fraction. We measure the ratio B(Λ0b→Λ+cπ−π+π−)/B(Λ0b→Λ+cπ−)=3.04±0.33(stat)+0.70−0.55(syst) which is used to derive B(Λ0b→Λ+cπ−π+π−)=(26.8+11.9−11.2)×10−3.
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CDF COLLABORATION. Measurement of the branching fraction B(Λb0 -> Λc+ππ+π) at CDF. In: Physical Review. D, 2012, vol. 85, n° 03, p. 032003. https://archive-ouverte.unige.ch/unige:38809

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Deposited on : 2014-07-21

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