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

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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

Abulencia, A; Adelman, J; Affolder, T; Akimoto, T; Albrow, MG; Ambrose, D; Amerio, S; ... CDF Collaboration; + view all (2007) 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. Physical Review Letters , 98 (12) , Article 122002. 10.1103/PhysRevLett.98.122002. Green open access

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Abstract

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|< 1.3: sigma(p (p) over bar ->Lambda X-0(b))/sigma(p (p) over bar ->(B) over bar X-0)xB(Lambda(0)(b)->Lambda(+)(c)pi(-))/B((B) over bar (0)-> D+pi(-))=0.82 +/- 0.08(stat)+/- 0.11(syst)+/- 0.22[B(Lambda(+)(c)-> pK(-)pi(+))].

Type:	Article
Title:	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
Open access status:	An open access version is available from UCL Discovery
DOI:	10.1103/PhysRevLett.98.122002
Publisher version:	http://dx.doi.org/10.1103/PhysRevLett.98.122002
Language:	English
Additional information:	© 2007 The American Physical Society
Keywords:	DECAYS
UCL classification:	UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI:	https://discovery.ucl.ac.uk/id/eprint/131707

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