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 $\BR(\Lambda^0_b\rightarrow \Lambda^+_c\pi^-\pi^+\pi^-) /\BR(\Lambda^0_b\rightarrow \Lambda^+_c \pi^-) = 3.04 \pm 0.33(\text{stat})^{+0.70}_{-0.55}(\text{syst})$ which is used to derive $\BR(\Lambda^0_b\rightarrow \Lambda^+_c\pi^-\pi^+\pi^-)= (26.8^{+11.9}_{-11.2})\times10^{-3}$.

Measurement of the branching fraction B(Λ_{b}^{0}→Λ_{c}^{+}π^{-}π^{+}π^{-}) at CDF

C. E. Pagliarone
Membro del Collaboration Group
;
2012

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 $\BR(\Lambda^0_b\rightarrow \Lambda^+_c\pi^-\pi^+\pi^-) /\BR(\Lambda^0_b\rightarrow \Lambda^+_c \pi^-) = 3.04 \pm 0.33(\text{stat})^{+0.70}_{-0.55}(\text{syst})$ which is used to derive $\BR(\Lambda^0_b\rightarrow \Lambda^+_c\pi^-\pi^+\pi^-)= (26.8^{+11.9}_{-11.2})\times10^{-3}$.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11580/25321
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