@misc{10481/96049, year = {2016}, month = {6}, url = {https://hdl.handle.net/10481/96049}, abstract = {This paper presents the measurement of the relative width difference ΔΓd/Γd of the B0-B0 system using the data collected by the ATLAS experiment at the LHC in pp collisions at √s = 7 TeV and √s = 8 TeV and corresponding to an integrated luminosity of 25.2 fb−1. The value of ΔΓd/Γd is obtained by comparing the decay-time distributions of B0 → J/ψKS and B0 → J/ψK*0(892) decays. The result is ΔΓd/Γd = (−0.1±1.1 (stat.)±0.9 (syst.)) × 10−2. Currently, this is the most precise single measurement of ΔΓd/Γd . It agrees with the Standard Model prediction and the measurements by other experiments.}, organization = {CERN}, organization = {MINECO}, organization = {EPLANET}, organization = {ERC}, organization = {FP7}, organization = {Horizon 2020}, organization = {Marie Skłodowska-Curie Actions}, organization = {Generalitat de Catalunya}, organization = {Generalitat Valenciana}, publisher = {Springer Nature}, keywords = {B physics}, keywords = {Hadron-Hadron scattering (experiments)}, title = {Measurement of the relative width difference of the B0-B0 system with the ATLAS detector}, doi = {10.1007/JHEP06(2016)081}, author = {Aaboud, M. and Aguilar Saavedra, Juan Antonio and Atlas Collaboration, /}, }