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Measurements of the branching fractions for B(s)->D(s)πππ and Λb0->Λc+πππ

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LHCb Collaboration (Including: Back, J. J., Dossett, D., Gershon, T. J., Harrison, P. F., Kreps, Michal, Latham, Thomas, Pilar, T., Poluektov, Anton, Reid, M. M., Whitehead, M. (Mark) and Williams, M. P.). (2011) Measurements of the branching fractions for B(s)->D(s)πππ and Λb0->Λc+πππ. Physical Review D (Particles, Fields, Gravitation and Cosmology), Vol.84 (No.9). 092001. ISSN 1550-7998

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Official URL: http://dx.doi.org/10.1103/PhysRevD.84.092001

Abstract

Branching fractions of the decays Hb→Hcπ-π+π- relative to Hb→Hcπ- are presented, where Hb (Hc) represents B̅ 0 (D+), B- (D0), B̅ s0 (Ds+), and Λb0 (Λc+). The measurements are performed with the LHCb detector using 35 pb-1 of data collected at √s=7 TeV. The ratios of branching fractions are measured to be [B(B̅ 0→D+π-π+π-)]/[B(B̅ 0→D+π-)]=2.38±0.11±0.21, [B(B-→D0π-π+π-)]/[B(B-→D0π-)]= 1.27±0.06±0.11, [B(B̅ s0→Ds+π-π+π-)]/[B(B̅ s0→Ds+π-)]=2.01±0.37±0.20, [B(Λb0→Λc+π- π+π-)]/[B(Λb0→Λc+π-)]=1.43±0.16±0.13 We also report measurements of partial decay rates of these decays to excited charm hadrons. These results are of comparable or higher precision than existing measurements.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science > Physics
Library of Congress Subject Headings (LCSH):	Hadrons -- Decay, Large Hadron Collider (France and Switzerland)
Journal or Publication Title:	Physical Review D (Particles, Fields, Gravitation and Cosmology)
Publisher:	American Physical Society
ISSN:	1550-7998
Date:	2 November 2011
Volume:	Vol.84
Number:	No.9
Page Range:	092001
Identification Number:	10.1103/PhysRevD.84.092001
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	Brazil. Coordenação do Aperfeiçoamento de Pessoal de Nível Superior (CAPES), Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ), Financiadora de Estudos e Projetos (Brazil) (FINEP), European Organization for Nuclear Research (CERN), Guo jia zi ran ke xue ji jin wei yuan hui (China) [National Natural Science Foundation of China] (NSFC), Germany. Bundesministerium für Bildung und Forschung (BMBF), Deutsche Forschungsgemeinschaft (DFG), Hermann von Helmholtz-Gemeinschaft Deutscher Forschungszentren (HGF), Max-Planck-Gesellschaft zur Förderung der Wissenschaften [Max Planck Society for the Advancement of Science], Science Foundation Ireland (SFI), Istituto nazionale di fisica nucleare (INFN), Stichting voor Fundamenteel Onderzoek der Materie (FOM) [Foundation for Fundamental Research on Matter], Nederlandse Organisatie voor Wetenschappelijk Onderzoek [Netherlands Organisation for Scientific Research] (NWO), SCSR (Poland), Autoritatea Nationala pentru Cercetare Stiintifica (ANCS), Federalʹnoe agentstvo po atomnoĭ ėnergii (Russia), Spain. Ministerio de Ciencia e Innovación (MICINN), Galicia (Spain : Region). Xunta, Catalonia (Spain), Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung [Swiss National Science Foundation] (SNSF), Switzerland. Staatssekretariat für Ausbildung und Forschung (SER), Nat︠s︡ionalʹna akademii︠a︡ nauk Ukraïny (NAS), Science and Technology Facilities Council (Great Britain) (STFC), National Science Foundation (U.S.) (NSF), European Research Council (ERC), Centre national de la recherche scientifique (France) (CNRS), Seventh Framework Programme (European Commission) (FP7/2007-2013)
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URI:	http://wrap.warwick.ac.uk/id/eprint/40318