2026-04-17T11:02:31Zhttps://recercat.cat/oai/requestoai:recercat.cat:2445/1957202025-12-05T16:43:31Zcom_2072_1057col_2072_478823col_2072_478917
RECERCAT
author
Garrido Beltrán, Lluís
author
Graciani Díaz, Ricardo
author
Graugés Pous, Eugeni
author
LHCb Collaboration
2023-03-21T12:00:11Z2023-03-21T12:00:11Z2012-072023-03-21T12:00:11Z
A precise determination of the effective B0 s → K + K − lifetime can be used to constrain contributions from physics beyond the Standard Model in the B0 s meson system. Conventional approaches select B meson decay products that are significantly displaced from the B meson production vertex. As a consequence, B mesons with low decay times are suppressed, introducing a bias to the decay time spectrum which must be corrected. This analysis uses a technique that explicitly avoids a lifetime bias by using a neural network based trigger and event selection. Using 1.0 fb−1 of data recorded by the LHCb experiment, the effective B0 s → K + K − lifetime is measured as 1.455 ± 0.046 (stat.) ± 0.006 (syst.) ps. © 2012 CERN. Published by Elsevier B.V. All rights reserved.
(c) Elsevier B.V., 2012 info:eu-repo/semantics/openAccess
Física de partícules
Mesons (Física nuclear)
Experiments
Gran Col·lisionador d'Hadrons
Particle physics
Mesons (Nuclear physics)
Experiments
Large Hadron Collider (France and Switzerland)
Measurement of the effective B0s→K+K− lifetime
info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion