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oai:recercat.cat:20.500.14342/32952025-03-11T04:13:46Zcom_2072_482405com_2072_183628col_2072_482415

Measurement of the ¯B0s→D−sD+s and ¯B0s→D−D+s Effective Lifetimes Calvo Gómez, Míriam Camboni, Alessandro Vilasís Cardona, Xavier LHCb Collaboration - CERN Universitat Ramon Llull. La Salle CERN Gran col·lisionador d'hadrons (França i Suïssa) Partícules (Física nuclear) Col·lisions (Física nuclear) Protons Mesons 53 The first measurement of the effective lifetime of the ¯B0s meson in the decay ¯B0s→D−sD+s is reported using a proton-proton collision data set, corresponding to an integrated luminosity of 3  fb−1, collected by the LHCb experiment. The measured value of the ¯B0s→D−sD+s effective lifetime is 1.379±0.026±0.017  ps, where the uncertainties are statistical and systematic, respectively. This lifetime translates into a measurement of the decay width of the light ¯B0s mass eigenstate of ΓL=0.725±0.014±0.009  ps−1. The ¯B0s lifetime is also measured using the flavor-specific ¯B0s→D−D+s decay to be 1.52±0.15±0.01  ps. 2014-03-19 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.14342/3295 https://doi.org/10.1103/PhysRevLett.112.111802 eng Physical Review Letters, 2014, Vol. 112, No. 11 (Març) Attribution 4.0 International © CERN http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess 9 p. American Physical Society