Measurement of sigma(0)(Lambda B)/sigma(0) x B(Lambda(0)(b)->Lambda(+)(c)pi(-))/B(B)over-bar(0)-> D(+)pi(-)) in p(p)over-bar collisions at root s=1.96 TeV RID G-1087-2011 RID E-4473-2011
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- DELL'ORSO, MAURO
- DONATI, SIMONE
- PUNZI, GIOVANNI
Publication date
January 2007
DOIAbstract
We present the first observation of the baryon decay Lambda(0)(b)->Lambda(+)(c)pi(-) followed by Lambda(+)(c)-> pK(-)pi(+) in 106 pb(-1) p (p) over bar collisions at root s=1.96 TeV in the CDF experiment. In order to reduce systematic error, the measured rate for Lambda(0)(b) decay is normalized to the kinematically similar meson decay (B) over bar (0)-> D(+)pi(-) followed by D(+)->pi(+)K(-)pi(+). We report the ratio of production cross sections (sigma) times the ratio of branching fractions (B) for the momentum region integrated above p(T)> 6 GeV/c and pseudorapidity range |eta|Lambda(0)(b)X)/sigma(p (p) over bar ->(B) over bar (0)X)xB(Lambda(0)(b)->Lambda(+)(c)pi(-))/B((B) over bar (0)-> D(+)pi(-))=0.82 +/- 0.08(stat)+/- 0.11(syst)+/- 0.2...
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