RT Journal Article
T1 Precision measurement of the ratio of the Λ0b to B¯ 0 lifetimes
A1 LHCb Collaboration, 
A1 Adeva Andany, Bernardo
A1 Álvarez Cartelle, Paula
A1 Dosil Suárez, Álvaro
A1 Fernández Albor, Víctor Manuel
A1 Gallas Torreira, Abraham Antonio
A1 Hernando Morata, José Ángel
A1 Pazos Álvarez, Antonio
A1 Pérez Trigo, Eliseo
A1 Plo Casasus, Máximo
A1 Rodríguez Pérez, Pablo
A1 Romero Vidal, Antonio
A1 Saborido Silva, Juan José
A1 Sanmartín Sedes, Brais
A1 Santamarina Ríos, Cibrán
A1 Seco Miguélez, Marcos Antonio
A1 Vázquez Regueiro, Pablo
A1 Vázquez Sierra, Carlos
AB The LHCb measurement of the lifetime ratio of the Λ b 0 baryon to the B¯ 0 meson isupdated using data corresponding to an integrated luminosity of 3.0 fb− 1 collected using 7and 8 TeV centre-of-mass energy pp collisions at the LHC. The decay modes used are Λ b0→ J/ψ p K− and B¯ 0→ J/ψ π+ K−, where the π+ K− mass is consistent with that of the K¯⁎0 (892) meson. The lifetime ratio is determined with unprecedented precision to be0.974±0.006±0.004, where the first uncertainty is statistical and the second systematic. This This result is in agreement with original theoretical predictions based on the heavy quark expansion. Using the current world average of the B0 lifetime, the Λ0 lifetime is found to be 1.479 +/- 0.009 +/- 0.010 ps
PB Elsevier
SN 0370-2693
YR 2014
FD 2014
LK http://hdl.handle.net/10347/21849
UL http://hdl.handle.net/10347/21849
LA eng
NO Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Albrecht, J., ... & Cartelle, P. A. (2014). Precision measurement of the ratio of the Λb0 to B¯ 0 lifetimes. Physics Letters B, 734, 122-130
DS Minerva
RD 28 abr 2026