RT Journal Article
T1 Observation of the decay Λ0b→Λ+cppπ−
A1 LHCb Collaboration, 
A1 Adeva Andany, Bernardo
A1 Boente García, Óscar
A1 Borsato, Martino
A1 Chobanova, Veronika
A1 Cid Vidal, Xabier
A1 Dosil Suárez, Álvaro
A1 Fernández Prieto, Antonio
A1 Gallas Torreira, Abraham Antonio
A1 García Plana, Beatriz
A1 Lucio Martínez, Miriam
A1 Martínez Santos, Diego
A1 Plo Casasus, Máximo
A1 Prisciandaro, James J.
A1 Ramos Pernas, Miguel
A1 Romero Vidal, Antonio
A1 Saborido Silva, Juan José
A1 Sanmartín Sedes, Brais
A1 Santamarina Ríos, Cibrán
A1 Vázquez Regueiro, Pablo
A1 Vieites Díaz, María
AB The decay Λ0b→Λ+cppπ−is observed using ppcollision data collected with the LHCb detector at centre-of-mass energies of √s=7and 8Tev, corresponding to an integrated luminosity of 3fb−1. The ratio of branching fractions between Λ0b→Λ+cppπ−and Λ0b→Λ+cπ−decays is measured to beB(Λ0b→Λ+c ppπ−)B(Λ0b→Λ+c π−)= 0.0540±0.0023±0.0032.Two resonant structures are observed in the Λ+cπ−mass spectrum of the Λ0b→Λ+cppπ−decays, corresponding to the Σc(2455)0and Σ∗c(2520)0states. The ratios of branching fractions with respect to the decay Λ0b→Λ+cppπ−areB(Λ0b→Σ0c pp)×B(Σ0c→Λ+c π−)B(Λ0b→Λ+c ppπ−)= 0.089±0.015±0.006,B(Λ0b→Σ∗0c pp)×B(Σ∗0c→Λ+c π−)B(Λ0b→Λ+c ppπ−)= 0.119±0.020±0.014.In all of the above results, the first uncertainty is statistical and the second is systematic. The phase space is also examined for the presence of dibaryon resonances. No evidence for such resonances is found.
PB Elsevier
SN 0370-2693
YR 2018
FD 2018
LK http://hdl.handle.net/10347/22297
UL http://hdl.handle.net/10347/22297
LA eng
NO LHCb Collaboration et al. (2018). Observation of the decay Λ0b→Λ+cppπ−. Physics Letters B, 784, 101-111
DS Minerva
RD 28 abr 2026