Measurement of the branching fraction ${\mathcal{B}}(\Lambda^0_b\rightarrow \Lambda^+_c\pi^-\pi^+\pi^-)$ at CDF

Aaltonen, T.; Alvarez Gonzalez, B.; Amerio, S.; Amidei, D.; Anastassov, A.; Annovi, A.; Antos, J.; Apollinari, G.; Appel, J.A.; Arisawa, T.

doi:10.1103/PhysRevD.85.032003

Measurement of the branching fraction ${\mathcal{B}}(\Lambda^0_b\rightarrow \Lambda^+_c\pi^-\pi^+\pi^-)$ at CDF

CDF

Collaboration

Dec, 2011

11 pages

Published in:

Phys.Rev.D 85 (2012) 032003

e-Print:

1112.3334 [hep-ex]

DOI:

10.1103/PhysRevD.85.032003

PDG:

{{\mathit \Lambda}_{{{b}}}^{0}}

\rightarrow

{{\mathit \Lambda}_{{{c}}}^{+}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{-}}

Report number:

FERMILAB-PUB-11-658-E

Experiments:

FNAL-E-0830

View in:

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Abstract: (arXiv)

We report an analysis of the

\Lambda^0_b\rightarrow\Lambda^+_c\pi^-\pi^+\pi^-

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

\Lambda^0_b\rightarrow \Lambda_c(2595)^+\pi^-

(with

\Lambda_c(2595)^+\rightarrow\Lambda^+_c\pi^+\pi^-

),

\Lambda^0_b\rightarrow \Lambda_c(2625)^+\pi^-

(with

\Lambda_c(2625)^+\rightarrow\Lambda^+_c\pi^+\pi^-

),

\Lambda^0_b\rightarrow \Sigma_c(2455)^{++}\pi^-\pi^-

(with

\Sigma_c(2455)^{++}\rightarrow\Lambda^+_c\pi^+

), and

\Lambda^0_b\rightarrow \Sigma_c(2455)^0\pi^+\pi^-

(with

\Sigma_c(2455)^0\rightarrow\Lambda^+_c \pi^-

) and measure the branching fractions relative to the

\Lambda^0_b\rightarrow\Lambda^+_c\pi^-

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}.

Note:

11 pages, 5 figures. Submitted Phys. Rev. D

14.20.Lq
14.20.Mr
Lambda/b0: branching ratio: measured
CDF
Batavia TEVATRON Coll
anti-p p: interaction
Lambda/b0: hadronic decay
Lambda/c(2593): intermediate state
Lambda/c(2625): intermediate state
Sigma/c(2455): intermediate state

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