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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, Matthew 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. doi:10.1103/PhysRevD.84.092001 ISSN 1550-7998.
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WRAP_Gershon_e092001.pdf - Published Version Available under License Creative Commons Attribution. Download (820Kb) |
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.
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